Ecología de los congriales de la Estación Experimental Nicolasito (Santa Rita, estado Guárico, Venezuela). 2. Fenología, potencial hídrico, conductividad estomática y anatomía foliar de Sweetia nitens (Vog.) Benth. (congrio) y Caraipa llanorum Cuatrec. (Saladillo)
Hernández, Ch.L.; Marín, Ch.D. (1998). Ecología de los congriales de la Estación Experimental Nicolasito (Santa Rita, estado Guárico, Venezuela). 2. Fenología, potencial hídrico, conductividad estomática y anatomía foliar de Sweetia nitens (Vog.) Benth. (congrio) y Caraipa llanorum Cuatrec. (Saladillo). Mem. Soc. Cienc. Nat. La Salle 58(150): 19-39
In: Memorias de la Sociedad de Ciencias Naturales "La Salle". Fundación La Salle/Museo de Historia Natural La Salle: Caracas. ISSN 0037-8518, meer
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| Auteurs | | Top |
- Hernández, Ch.L.
- Marín, Ch.D.
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| Abstract |
Sweetia nitens (congrio) and Caraipa llanorum (saladillo) are typical trees fron the seasonal swamp forests known as "congriales", in the south and south-east of the Guárico State in Venezuela. They are evergreen species with flowering in the second half of rain season. Fruiting begin on September for congrio trees and October for saladillo. Flushing occur from June to November in congrio plants, and between September and April in C. llanorum. Daily courses of leaf water potential (Yh) and leaf conductance (g) during wet season, showed higher g values and lower Yh (P<0,01) in S. nitens. In the dry season g values were significatively lower than wet season in both species (P<0,01). Leaves of congrio and saladillo are sclerophylls, dorsiventrals, without hypodermis, with thick outer epidermal cell walls and cuticles, low values of Specific Leaf Area, paracytic stomatal complexes, and with calcium oxalate druses. Moreover, saladillo leaves have abundance of sclerenchyma. Sclerophyll appear more connected with N than P levels in the congrial soil. |
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