Consideraciones epidermico-foliares sobre la tribu Caesalpinieae (Leguminosae-Caesalpinioideae) en Cuba. Acta Bot. Cub. 102:1-10 diciembre, 1994.
Beyra Matos, Angela y Adelaida Barreto Valdés.
Abstract. En el presente trabajo se describe la epidermis foliar de algunos taxones cubanos de la tribu Caesalpinieae. El estudio anatómico permitió definir ciertos caracteres diferenciales en los géneros Caesalpinia, Parkinsonia, Delonix y Peltophorum. Los caracteres anatómicos examinados, utilizados junto con los morfológicos pueden servir como herramientas taxonómica eficaz para llegar a definiciones intergenericas dentro de la subfamilia.
Consideraciones epidermico-foliares sobre los taxones cubanos de la familia Simaroubaceae. Acta Bot. Cub. 103:1-16 diciembre, 1994.
Beyra Matos, Angela y Adela Cárdenas Alvarez.
Abstract. Se reportan las características del tejido epidermico-foliar, examinadas en seis géneros y 13 especies cubanas de la familia Simaroubaceae, tomando en consideración parámetros de tipo cualitativo y cuantitativo. El estudio histologico permitió definir los caracteres de valor diagnostico para la identificación de géneros y especies dentro de la familia. Las diferencias intergenericas halladas en cuanto a los rasgos anatómicos evaluados contribuirán, junto a los caracteres morfológicos, al establecimiento de definiciones taxonómicas dentro de la familia.
Plantas alimenticias silvestres y cultivadas para el consumo humana en la provincia de Camagüey. Acta Bot. Cub. 104:1-20 diciembre, 1994.
Pérez Carreras, Everardo; Nestor Enríquez Salgueiro y Norkis Sarduy Carmenates.
Abstract. Se estudia el recurso floristico como potencial alimentario en la provincia de Camagüey. Se hacen los análisis de 214 taxones que pertenecen a 163 géneros de 76 familias de plantas superiores; de ellos, 125 son silvestres y 89 cultivados. Se destaca la importancia de algunos arboles, arbustos y hierbas como productores de alimentos y la existencia entre ellos de 40 taxones con algunas porciones tóxicas. Se señala, además, la distribución y diversidad de las diferentes especies alimenticias entre las formaciones vegetales que caracterizan la provincia, donde se encuentran, por ejemplo, 35 taxones en el bosque siempreverde microfilo y 50 en las sabanas antropicas. Se refieren las diferentes partes comestibles de las plantas y algunas formas de uso de las mismas. Se incorpora el esquema con la distribución de las especies alimenticias por el territorio.
Arquitectura foliar de las especies del genero Caesalpinia L. (Leguminosae: Caesalpinioideae) en Cuba. Acta Bot. Cub. 105:1-12 diciembre, 1994.
Beyra Matos, Angela y Adelaida Barreto Valdés.
Abstract. Se examinaron materiales de 25 taxones del genero Caesalpinia L. Presentes en la flora cubana, que se caracterizaron teniendo en cuenta la arquitectura foliar. Se describió la forma, el margen y la posición de las glándulas de los foliolos, así como su textura y además, la venacion de orden mayor y menor. La mayoría de las especies mostraron el patrón de venacion pinnado camptodromo broquidodromo-eucamptodroma. El patrón pinnado camptodromo cladodromo-broquidodromo se observo en C. pinnata. Los aspectos de la venacion analizados resultaron importantes a nivel especifico y subespecifico cuando se consideraron en conjunto.
Características morfológicas de las semillas de algunos taxones de la subtribu Cassiinae (Leguminosae: Caesalpinioideae: Cassieae). Acta Bot. Cub. 106:1-13 diciembre, 1994.
Barreto Valdés, Adelaida; Olga Medina Torres y Nestor Enríquez Salgueiro.
Abstract. Se calculo el largo y el ancho de las semillas de los diferentes taxones y se estableció el intervalo de valores para estos caracteres. Se modifico el limite superior de los valores del largo de la semilla planteado por Corner (1976) para el grupo y el inferior de los complejos varietales de S. hirsuta y S. pendula señalado por Irwin y Barneby (1982 a). Se describió cualitativamente cada taxon teniendo en cuenta la forma, el color, las características de la testa, el tipo de embrión y los cotiledones en corte longitudinal y transversal. Se corroboro la presencia en las especies de Senna, de una areola limitada por un pleurograma en las caras laterales de la testa y de ornamentaciones microscópicas en aquellas de Chamaecrista, lo que posibilita su uso en la diferenciación interespecifica. No se observaron en Cassia. Los detalles externos de la testa sustentan las consideraciones de Irwin y Barneby (1981) sobre la escisión de Cassia s. L.
Características de la epidermis foliar de especies cubanas de la subtribu Cassiinae (Leguminosae: Caesalpinioideae: Cassieae). Acta Bot. Cub. 107:1-25 diciembre, 1994.
Barreto Valdés, Adelaida; Angela Beyra Matos.
Abstract. Se estudiaron algunos caracteres de la epidermis foliar, de valor taxonómico, en 57 taxones de la subtribu Cassiinae (=Cassia L. s. l.) presente en la flora cubana. Los resultados alcanzados fueron de interés en la caracterización epidermico-foliar de los taxones analizados de la subtribu y sirvieron a otros autores para definiciones taxonómicas sobre algunos taxones del grupo.
Uso potencial de algunas comunidades ruderales en Cuba. Región occidental. Acta Bot. Cub. 108:1-18 diciembre, 1994.
Rosete Blandariz, Sonia; Nancy Ricardo y Yamila Jiménez.
Abstract. Se analizo una extensa revisión bibliográfica, con el fin de conocer el uso potencial de las especies incluidas en las comunidades ruderales. De las 180 especies que se establecen en las ciudades del occidente del país, 73% son potencialmente útiles. Se relacionan los tipos de uso de estas sobre la base de reportes bibliográficos y se incluyen además las plantas tóxico-venenosas.
Efectos de seis cepas de hongos micorrizogenos arbusculares sobre la nutrición de plantas de cítricos en vivero. Acta Bot. Cub. 109:1-8 marzo, 1998.
Izquierdo, Irma; María J. Garcia y Julia Azcuy.
Abstract. The influence over the inoculation with strains of micorrhizal arbuscular fungi in the upon the taking of the soil macronutrients (NPK) as well as their assimilation by mandarino Cleopatra (Citrus reshni Hort. ex Tan.) in nurseries is evaluated. A ferralitic red soil without organic and chemistry enmandation, with pH=7.1 were used. The analysis of the nutritional contents and their relationship with other evaluated items permitted to corroborate the effectiveness of the arbuscular micorrhizae (AM). As it regards the phosphorus adsorption we may say, that it was possible to observe several increase of this element in inoculated plant with Glomus mosseae and Glomus intraradices. It migth be observed and outstanding an increased of level the N, P and K nutrients in inoculated plants with Glomus spurcum and Glomus agreggatum followed by Glomus manihotis. Due to the efficiency of these strains of AM fungi, some considerations about of their application migth be established, with more use perpectives for the development of this citric pattern.
Formaciones vegetales del macizo montañoso Guamuhaya, Cuba
Acta Bot. Cub. 110:1-7 marzo, 1998.
Ricardo, Nancy; Daysi Vilamajo; Mirna Duarte; Luis Montes; Oscar Valdes-Lafont; Rene Capote; Elisa E. Garcia y Yamila Jiménez.
Abstract. The vegetation map of the Guamuhaya mountain massif is presented and the plant formations are described. This massif is in the province Cienfuegos, Sancti Spiritus and Villa Clara of Cuba. The tropical vegetation units are based on physiognomic, ecological and geographic criteria. The main vegetation formations including montane humid rainforest, semidecidous forest and evergreen forest.
Valoración biológica del uso del inoculante micorrizogeno VA cubano MicoFert(r) en viveros de citricos. Acta Bot. Cub. 111:1-10 marzo, 1998.
Garcia, María J.; Enrique Pouyu; Julia Azcuy; Irma Izquierdo; Ainel Valdés; Eduardo G. Cañizares y Ricardo A. Herrera.
Abstract. MicoFert(r) is the comercial name used in Cuba for the VA mycorrhizal inocula. The aplication of six VAM fungal strains (Agricultural MicoFert(r), on growth of citrus seedlings cultivated in a nursery was evaluated during 19 months. As a roostock Cleopatra mandarin (Citrus reshni Hort. ex Tan) was cultivated on Red Ferralitic soil without organic amendment, pH=7.1. This trial was developed in the Citrus Enterprise "Ceiba del Agua" from May 1992 to December 1993. Different parameters were estimated after 17 months growth period as follows: height; leaves, stem, roots and rootlets dry weigths; and nutrient contents (NPK) in soil. Mycorrhizae were assessed as the colonization percentage and "visual density" of VA endophytes. After 19 months growth, photosynthetic and transpiration rates, in addition to folial conductancy were measured. Glomus aggregatum, G. manihotis, and G. spurcum significantly influenced citrus growth and photosynthesis. The results confirm the advantage of using MicoFert(r) in citrus murseries. Seeedling survival improvement and saving of three months growth period was shown for citrus nurseries when MicoFert(r) was used. In addition, the utilization of MicoFert(r) represent a saving of 140 000 Cuban Pesos per million of inoculated seedlings.
Influencia del ganado en aspectos del funcionamiento de tres ecosistemas de la Reserva de la Biosfera Guanahacabibes, Cuba. (Bostas y actividad biológica del suelo). Acta Bot. Cub. 112:1-8 mayo, 1998.
Rodríguez, María E. y Ana A. Socarras.
Abstract. Two forest types: semideciduous and microphyllous evergreen; and two pasture areas on old dunes were studied at the Biosphere Reserve of Guanahacabibes at the occidental part of Cuba. The biological activity and cellullolitic activity as well as mesofauna community composition were studied, comparing soil and soil under the cattle's dung. Soil (0-10cm) under dungs showed a higher C-mineralization and cellullolitic activity which was also influenced by soil humidity. A variation of the mesofauna community structure with a higher amount of Astigmata among the Acari groups in the dungs soil was also observed. A counting and classification of dungs was performed according to their decomposition status by means of transects on all areas. Between 40 and 75% of dungs presented germinated seeds in forests and 7-28% in pastures. Rootlets invading the dungs were observed in 50-100% and in 15-67% of the forests and pastures dungs, respectively. The results showed the ecological role of cattle dungs on the function of ecosystems.
Fitorrecursos del macizo montañoso Guamuhaya, Cuba. Acta Bot. Cub. 113:1-24 mayo, 1998.
Ricardo, Nancy; Daysi Vilamajo; Yamila Jiménez y Mirna Duarte.
Abstract. The analysis of the useful wild flora of the Guamuhaya mountainous massif and the catalog floristic is attached that understands 347 species where the taxa prevails with medicinal, timber-yielding and melliferous; 40 taxa are cuban endemic plants what represents 11,5% of the total. The species with more use diversity are: Roystonea regia (palma), Clusia rosea (cupey), Cecropia schreberiana (yagruma hembra), Genipa americana (jagua), Sapindus saponaria (jaboncillo) y Bursera simaruba (almácigo).
Mapa de vegetación del territorio provincial de Cienfuegos, Cuba, escala 1: 250000. Acta Bot. Cub. 114:1-6 septiembre, 1998.
Vilamajo, Daysi; Nancy Ricardo; Oscar Valdes-Lafont; Rene Capote; Elisa E. Garcia; Mirna Duarte, Yamila Jiménez y Luis Montes.
Abstract. The vegetation map of Cienfuegos Province, Cuba, is presented and the plant formations are describeb. This map was elaborated according to teledetection and geobotanical methods. The areas with natural vagetation are in the southern part of this province. Data base for the flora taxa was obtained, and in its contains with more than 1 100 species were analyzed the potentialities of them. This Database is deposited in National Biodiversity Center of the Institute of Ecology and Systematics.
Comportamiento germinativo de Diospyros philippensis (Desr.) Guercke, ante diferentes niveles de temperatura del substrato y de almacenamiento. Acta Bot. Cub. 115:1-8 diciembre, 1998.
Sánchez Rendon, Jorge A.; Eric Calvo; Barbara Muñoz y Ramón Orta.
Abstract. The present work determined the correlation existing between the different types of seeds of Diospyros philippensis, (Desr.) Guercke and its germinative response on different leves of temperature of substratum and this stored. The seed were classified in two categories of size (morphs I and II), according with their presences in fruits. In each morph it was determined: lenght, width, thickes, fresh weight, dry weight, humidity content and percent of germination. All the parameters differ between morph. The morphological variability shows a clear relationshisp with its germinative response. The major percent of germination in both morphs had at 25°C. The bigger seed (morph I), had the major percent of germination. In both morphs the temperature affected the seeds viability.
Caracterización espacial de la biomasas subterránea en pastizales del Instituto de Ciencia Animal. Acta Bot. Cub. 116:1-7 diciembre, 1998.
Hernández, Luis; Jorge A. Sánchez y Jesús Lazo.
Abstract. The spatial characterization of the underground biomass have been studied in the pastures with Cynodon nlemfuensis predominance, in area of the Institute of Annimal Sciences. For vertical distribution the samples were taken with soil monolith of 12.3 cm of diameter-in profiles from 0 to 95 cm of depth- and 5.0 cm for the horizontal distribution. The components of the underground biomass were classificated in roots rhizomes and detritus. The roots according to their diameters were divided in fine root (<0.02mm). intermediate root (from 0.2 to 0.5mm) and coarse root (>0.05mm). The major concentration of underground biomass was found in the layer o to 15 cm, downard the underground biomass disminishes together with depth. The 75% of the total underground biomass was in 0 to 15 cm layer, and the porcentaje of root, rhizomes and detritus in it was 42.8, 25.2 and 32.0%, respectively, the fine root represented 30.7% from the total biomass. The horizontal distribution of the underground biomass components was affect by soil variability and gramineaus species arrangement. The fine root porcentaje (beteween 26 and 48%) shaved the principal variability of the root biomass.
Flora del macizo montañoso Guamuhaya, Cuba. Acta Bot. Cub. 117:1-26 diciembre, 1998.
Ricardo, Nancy; Pedro Herrera; Vilamajo, Daysi; Luis Montes; Mirna Duarte y Yamila Jiménez.
Abstract. The Guamuhaya massif reaches near 80km of extension and it occupies territories of the provinces Cienfuegos, Sancti Spiritus and Villa Clara. This mountainous massif presents 724 taxa, 419 genus and 121 families, of these, five represent 25,7% of the total of the taxa: Rubiaceae, Asteraceae, Poaceae, Euphorbiaceae and Orchidaceae; 163 cuban endemics taxa qere quantified, of them 23 correspond to the mountainous massif Guamuhaya one represented by 7 local, 5 distritals, 8 subdistritals and 3 sectorial.
Inducción de tolerancia al déficit hídrico en Trichospermum grewiifolium. Acta Bot. Cub. 118:1-16 diciembre, 1998.
Sánchez, Jorge A.; Tatiana M. Blanco y Barbara Muñoz.
Abstract. The object of the present paper was to determinate the effects that had the combination of pregerminative hydration-dehydration and heat shock treatments on Trichospermum grewiifolium seeds, pioneer shrub species. The combination of two cycle of partial hydration with heat shock to 40°C for 1hr was the best treatment. This procedure increased seeds germination and emergence under water deficit. The possible factors that limited this species only to humid climates were discussed.
Influencia de la calidad del inoculo micorrizogeno sobre el crecimiento de plantulas de pinos. Acta Bot. Cub. 119:1-11 diciembre, 1998.
Ruiz, Margarita; Sara Herrera; Hugo Iglesias; Jorge L. Ortiz y Teresa Cabrera.
Abstract. The advantages of the spores utilization of Pisolithus tinctorius as effective inoculum in the growth and development of Pinus caribaea are discurssed. A comparison between the traditional inoculation method used in nurseries in Cuba, and the utilization of spores and vegetative micelium of these mycorrhizal fungi was accomplished, being obtained the better results for spores as inoculum. Besides, it was demonstrated that, to inoculation effects, the spores should have not more than 2 years of storage, if optimal results are to be obtained in nursery production.
Valoraciones acerca de la relación entre la micorrizacion y el contenido de nutrientes en diferentes poblaciones de casuarinas (Casuarina equisetifolia). Acta Bot. Cub. 120:1-8 diciembre, 1998.
Ruiz, Margarita; Irma Izquierdo; Ana Ma. Sotolongo; Bertha Sandrino y Marta Lescaille.
Abstract. A comparative study in different casuarina populations was developed with the objective of determine the mortality possible causes of some of them. Five soil cores and green leaves samples were collected in each case. Mycorrhizal indexes like colonization percentage, occupancy and endophyte were evaluated as well as rootless and nodules biomass. Nutrient foliage and nitrogen, phosphorus, calcium and magnesium soil contents were also measured. The results suggest that unbalance between occupancy-rootless ratio and nutrients relationships, as well as aeration and soil pollution could be the reason why a functional unbalance was found in casuarina plants in the most disturbed areas.
Modelo de hidratacion parcial en agua para tratamientos revigorizadores, acondicionadores y robustecedores de semillas. Acta Bot. Cub. 121:1-8 diciembre, 1998.
Orta Cruz, Ramón; Jorge A. Sánchez Rendon; Barbara Muñoz y Eric Calvo.
Abstract. The pregerminative hydration-dehydration treatments had proved to be effectives to reinvigorate old seeds, to acelerate and to make uniform the germination of the lots or resistence enhance of the plants resulting the environmental stress; effects known as: reinvigoration, priming or hardening, respectively, based on the partial hydration hold in the time, followed of a process of dehydration before the sowing. These methods, they're though effectives, had not been used in the international agricultural practice, due to that the imbibition solutions proposes must contain polymers that act perfect osmotic and permit the partial imbibition for potential's equilibrium of seed-solutions a during a determined time. We had developed a model of imbibition a successive hydration-dehydration cicle in pure water, used the time like barrier to partial imbibition and not the osmotic potencial of the solution. This model is economic, single and we got similar results to the one in the references.
Programa ECAT para la determinación del grado de antropizacion de un territorio, versión 2.1 para Windows 3.X y 95. Acta Bot. Cub. 122:1-4 diciembre, 1998.
Ferras, Hermen; Nancy Ricardo y Ana Martell.
Abstract. The ECAT software for valuation of the anthropic degee of territory was created, in a specific application system, supported in Microsoft Windows version 3.1 or later, and written in language Delphi version 1.4 of 16 bits. It was chosen for the creation of the system the Delphi for their friendly operation, use easiness and their compatibility with the compilers I upset Pascal and Borland Pascal.
La diversidad vegetal en el entorno del río Almendares. Acta Bot. Cub. 123:1-11 diciembre, 1998.
Vilamajo, Daysi y Margarita Lauzan Coto.
Abstract. The main object of this study was to take an overview of the ecological problems of the Almendares river neighbordhood located between 100 Avenue and Rancho Boyeros and the mouth of this river. This research included studies about the flora and the phisionomic features of the natural and / or cultural plant communities with an appropiate extension to be identified and delimited by air photograph at the scale 1:10 000. For these purpose remote sensing and field sampling methods were used.
During the 8 years of investigations it was proved that the plant cover surface inside the city goes on decreasing. Thirty tree species were identified, it means that there is already a diversity of this type of plants to take it into account for territorial enviromental ordering programs.
Manual de identificación de los hongos fitopatogenos de la caña de azúcar en Cuba. Acta Bot. Cub. 124:1-75 agosto, 1999.
López Mesa, María Ofelia; Ileana Sandoval y Julio Mena.
Abstract. Sugarcane is one of the most important crops in Cuba and its mycobiota is exceptionally rich. With the purpose of simplify the diagnostic work of its fungic pathologies, this paper was prepared. The presence of more than 100 fungic species was determined, 36 of them pathogenic. Nine dichotomic keys to the determination of groups, genera and species were constrcted. Fortythree species are described. Of these, seven are new records to sugarcane in Cuba: Cerebella andropogonis, Fusarium equiseti, Lophodermium sp., Phoma sorghina, Pteroconium anamorfo de Apiospora camptospora, Pythium aphanidermatum and sclerotium bataticola; and a new pathogen causing sugarcane leaf spots: Bipolaris bicolor. Also, a new combination for Leptosphaeria sacchari are proposed and fifteen other new records are listed.
Agromercados en Cuba: Reservorios de Germoplasma. Acta Bot. Cub. 125:1-8 noviembre, 1999.
Fernández, Maira; Cándida Martínez; Sonia Rosete y Julio I. Martínez.
Abstract. The study of four agriculture markets from Havana city, corroborated that they are functionals, and that they can stablish economics and social relations, which are the bases for the interchange of seeds, products, and cultivation experience and as an annually average, they registered 88 products, the vegetable diversity that is been offering, the families and botanical diversity more representatives, as well as the inestability of the prices.
Sinantropismo de la flora del macizo montañoso Guamuhaya, Cuba. Acta Bot. Cub. 126:1-25 diciembre, 1999.
Ricardo, Nancy; Pedro Herrera y Alberto González.
Abstract. The Guamuhaya mountains are characterized by autochthonus species, 46,1% of which are synanthropics and among them 256 apophytes taxa mainly represented by intrapophytes. This territory still has areas of original vegetation in a good state of conservation.
Afectaciones a la diversidad vegetal producto de la urbanización. caso ciudad de La Habana. Acta Bot. Cub. 127:1-10 diciembre, 1999.
Bastart Ortiz, José A. y Daysi Vilamajó Alberdi.
Abstract. In the present study is analyzed the diferent human actions carry out in Havana city which have a direct incident over the original flora and vegetation . There are identification of the different enviromental impacts which they change the characteristics of this natural component . The authors give information about the original aspect of the Havana flora. This data were obtained from the data base of Biodiversity National Centre (CeNBio). This study take into account the principal threats which afect the plant diversity .
Estado de actualización del Herbario de la Academia de Ciencias de Cuba (HAC). I. Subclases Magnoliidae, Hamamelidae y Caryophyllidae (Magnoliatae). Acta Bot. Cub. 128:1-7 diciembre, 1999.
Martínez Martínez, Ma. Cristina y Francisco Cejas Rodríguez.
Abstract. With the purpose of assessing the richness of the HAC herbarium, Cuban specimens deposited in the Section of Consultation and belonging to the Subclasses Magnoliidae, Hamamelidae and Caryophyllidae were brought up-to date. A database was made and the actual results are exposed in the present work.
Adiciones al tratamiento taxonómico de Callicarpa L. (Verbenaceae: Viticoideae), en Cuba. Acta Bot. Cub. 129:1-3 diciembre, 1999.
Baro Oviedo, Isora.
Abstract. Two series are stablished in Cuba for the genus Callicarpa L., in relation with the presence or absence and coloration of the foliar indument beneath.
Evaluación del estado de conservación de la familia Asteraceae en Cuba. Acta Bot. Cub. 130:1-16 diciembre, 1999.
Herrera Oliver, Pedro P.; Miriam L. Prede Rodríguez y Francisco Cejas Rodríguez.
Abstract. In order to actualize the conservation state of the family Asteraceae in Cuba the metodology approved by IUCN (1994) was followed. A list of 113 species with their corresponding category is proposed.
Cambios en la composición floristica de la Laguna del tesoro, Cuba. Acta Bot. Cub. 131:1-7 diciembre, 1999.
Plasencia Fraga, Jose; Andres Hurtado y Tania Chateloin.
Abstract. Treasure lagoon, the largest freshwater natural reservoir in Cuba, has shown changes in macrophytes species diversity recently. Fron 18 species in 1973, belonging to four plant associations, only three species were recorded in 1996, which belong to Nymphaetum amplae Borhidi et Muñiz. A mortality of Typha domingensis (Pers.) Kunth and the growth of small trees of Rhizophora mangle L. close to the macrophyte belt was observed. Natural and antropic causes of these changes are analized.
Características del humus en suelos afectados por la minería en Moa. Acta Bot. Cub. 132:1-4 diciembre, 1999.
Rodriguez, Maria E. y Stella Gordienko.
Abstract. Humus fractioning was done using Tiurin technique modified by Ponomariova-Plotnikova. Natural vegetation sites in different succsessional stages and spoil heaps (15 year) were compared. FA predominate in this Ferritic soil (Ferralsol), representing more than 70% of soil carbon. Humines were also high. Second fraction (joint to Ca-Mg) in FA and HA was absent even in the natural forest but was present in the site with grasses and pinus plus latifolious vegetation in successional stage. Those elements are practically absent from this soil, so it means not only a better humus quality but an advantage to the establishment of secondary plant species that will prevent erosion and leaching strongly affecting soils in Moa conditions.
Funcionamiento diferencial de varias cepas de Glomus spp. Ante las variaciones del pH. Acta Bot. Cub. 133:1-8 diciembre, 1999.
Ruiz, Margarita; Ainel Valdes y Ricardo Herrera.
Abstract. pH effect on the behaviour of 10 strains of Glomales inoculated to tomato plants (cv Roma; VFP-93) was tested. Plants were fed with Long Ashton solution adjusted with NaOH in order to get the three pH levels used in the experiment (4.5; 6.5; 7.3). A marked effect on fungi growth was obtained by using these three pH levels which had a significant influence on biomass and mycorrhizal parameters. The hypothesis of Herrera et al. (1997) concerning the existence of strains having Austere or Exuberant behaviour was confirmd. Thus, the larger biomass yield in Glomus aggregatum, G. caledonium and G. sp. (Austere) were caused by the external mycelium whereas endophytes and mycorrhizal colonization rendered a biomass increase in the most Exuberant strains (G. intraradices, G. mosseae (IES-13) and G. tunicatum).
Agrupamiento del comportamiento en vivero del patrón de cítrico mandarino Cleopatra inoculado con MicoFert( Agrícola. Acta Bot. Cub. 134:1-8 diciembre, 1999.
García, Ma. Julia y Jorge A. Sánchez.
Abstract. The effect of the application of six types of Agricultural MicoFert(r), AMF, on the growth of citric plants cultivated in nurseries condition was evaluated. The rootstock employed was mandarino Cleopatra (Citrus reshni Hort. ex Tan). The obtained results from the growth and mycorrhizal indicators were processed through principal components analysis. All the growth variables except rootlets dry weight and mycorrhizal colonization presented meaningful correlation within each group of variables but they are mutually indepedent. The plants inoculated with the types of AMF IES-2 (Glomus manihotis) and IES-4 (G. aggregatum) reached the maximun growth values and minimal of mycorrhizal colonization what demonstrated the efficiency of them.
Dependencia Micorrízica de Seis Leguminosas Arbóreas Tropicales. Acta Bot. Cub. 135:1-12 diciembre, 1999.
Orozco, M.O., R. A. Herrera, E. Furrazola, L. Lastres y Y. Torres.
Abstract. Mycorrizal depencencies of six topical woody legumes: Leucaena leucocephala (Lam.) De Wit., Delonix regia (Bojer) Raf., Albizzia lebbeck (L) Benth, Caesalpinea violacea (Mill) Standl., Albizzia procera Benth y Andira inermis (Sw) HBK was study. Plants were inoculated with native VAM from two different soils collected from a primary evergreen forest plot (FO) or its neighbor road slope (RS) showing a pseudoclimax early successional vegetation. Experiments lasted 18 weeks in greenhouse conditions. At the end of the trial seven variables were quantified: shoot dry mass (SDM); root dry mass (RDM); VA mycorrhizal dependency (DM); number of nodules per plant (No.Nod.), nodule dry mass per plants (NDM), mycorrhizal root colonization percentage (% CM) and vesicular arbuscular external mycelium mycomasses (AEM). Additionally some seeds characteristics from the plants tested were calculated: seed size, seed dry mass, dry mass of seminal reserves, and dry mass of seed coats. The results showed that in general for five plant species tested all the variables recorded were higher and significantly different when the plants were inoculated with RS soil. That means a better Glomalean fungal fitness present in RS inocula in comparison with FO soil inocula. In the case of Andira inermis (Sr.) HBK with a big seed, data showed that this species was more dependent from cotyledon reserves so that negative values of DEP indicate no benefit effects of VAM. A natural nodulation level was found in three of the six species tested. It is interesting to note that the non-inoculated controls (non-mycorrhizae, only leaching added) never presented nodulation. It is an evidence of synergistic effect between VAM inocula and Rhizobium bacteria. RS produced also a higher nodule stimulation.
Relaciones de la diversidad en la flora endémica cubana con la vegetación y la aridez del clima. II) Estudio de las variables climáticas. Acta Bot. Cub. 136:1-12 diciembre, 1999.
Ferrás Alvarez, Hermen; Antonio López Almirall; Ana Martell García; Avelino G. Suárez Rodríguez.
Abstract. A study using geographic information system (gis) and multivariate analysis tools was made to obtain the relation between the climatic variables and the floristic composition of the different phytogeografic districts of cuba. a negative correlation between the precipitations and the aridity index of the studied region was obtained as result. the analysis of the means changes in the temperature and precipitation regime predicted by the applied general circulation models allows us to predict the possible variation in the composition of the natural vegetation as consequence of these changes.
Simulación del funcionamiento de un bosque siempreverde y de la dinamica del carbono basado en un modelo de produccion de materia seca. Acta Bot. Cub. 137:1-12 diciembre, 1999.
Ferrás Alvarez, Hermen; Francisco Lopez; Francisco Acosta; Ana Martell García; Avelino G. Suárez.
Abstract. A microcomputer model to simulate the functioning of tropical evergreen forest was elaborated. To reach this goal were modified and adapted rainforest simulation models. As result of the modeling we obtained that the tropical forest overtakes rapidly the optimal value of biomass, keeping after that around it. On the other hand, the augmentation of the atmosferic CO2 concentration produces the increase of the ecosystem's primary production and the growth of it's total biomass.
Aspectos de la biología de cuatro especies de hongos comestibles (basidiomycetes). Acta Bot. Cub. 138:1-6 diciembre, 1999.
Blanco Hernández, Nelis y Sara Herrera Figueroa.
Abstract. Mycelial growth of four strains of different species of edible mushrooms: (9-93) volvariella volvacea (bull. ex fr.) singer; (10-93) lentinus edodes (berk.) singer; (11-93) pleurotus ostreatus (jacq. : fr.) p.kumm. y (12-93) auricularia polytricha (mont.) sacc. were studied. they were characterized under six different temperatures: 20, 25, 28, 32, 35 and 40 °c. on solid media malt extract agar. their cultural characteristics were studied and the production of extracellular oxidases was determined. results showed that the best strains for cultivation in cuba are volvariella, lentinus and auricularia.
La familia Cladoniaceae en Cuba. I. Los géneros Cladia y Cladina. (Ascomicetes Liquenizados: Lecanorales). Acta Bot. Cub. 139:1-10 abril 2000.
Iglesias, Hugo.
Abstract. One species of Cladia Nyl. and three of Cladina (Nyl.) Nyl. are recognized in Cuba. Their morphological and chemical features are mentioned. Data about their distribution in Cuba and worldwide are offered. keys of genera and species are provided. Cladina subtenuis (abbayes) mattick is reported for the first time from this country.
Fenologia de Trichospermum grewiifolium (A. Rich.) Kosterm. (Tiliaceae). Acta Bot. Cub. 140:1-8 abril 2000.
Albert Puentes, Delhy; Ana Martell; Pedro Herrera y Victor Vigil-Escalera.
Abstract. The phenological pattern of de Trichospermum grewiifolium (A. Rich.) Kosterm. (Tiliaceae) is given. Data on its distribution, polinators and seed dispersal are also discussed.
Composición de la familia Asteraceae en Cuba. Acta Bot. Cub. 141:1-20 abril 2000.
Herrera Oliver, Pedro P.; Miriam L, Prede y Francisco Cejas.
Abstract. The composition of the family Asteraceae has changed significatively since the publication of the fifth volume and Supplement of the "Flora de Cuba" (Alain 1964, 1974). According to current modifications and additions, whith the taxonomic treatment of the family has undergone, the up to date list of the Cuban species of Asteraceae is given. This list, validates a total of 484 infrageneric taxa, including 72 cultivated, together with their synonymus, which amount to more than 450 taxa.
Actualización de las especies comprendidas en el Volumen V de la obra "Flora de Cuba" (1964): Caprifoliaceae a Asteraceae. Acta Bot. Cub. 142:1-22 abril 2000.
Prede, Miriam L.; Pedro Herrera Oliver y Francisco Cejas.
Abstract. Changes related to nomenclature and new reports issued since the publication of the fifth volume of the "Flora de Cuba" (Alain, 1964) in all families except Rubiaceae are given.