Elizabeth Rengifo

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Trees in the flooded forest of the Mapire River in Venezuela suffer a decrease in photosynthetic rate (A) when flood begins, which is reverted at maximum flood. Changes in A are accompanied by similar changes in stomatal conductance (g(s)), and the possibility of changes in photosynthetic capacity is not ruled out. In order to understand how relative(More)
Water relations and photosynthetic characteristics of plants of Lycium nodosum grown under increasing water deficit (WD), saline spray (SS) or saline irrigation (SI) were studied. Plants of this perennial, deciduous shrub growing in the coastal thorn scrubs of Venezuela show succulent leaves which persist for approx. 1 month after the beginning of the dry(More)
In Venezuela 30,000 km2 of land is covered by savannas, of which 410,000 ha have been planted with several species and hybrids of Eucalyptus for lumber and pulp production. Popular concern about possible diminutions in water availability of reservoirs near eucalypt plantations prompted our interest in measuring water use by these trees. Since these savannas(More)
SUMMARY In order to gain knowledge on the physiological and anatomical responses of plants to long-term growth under elevated CO 2 concentrations, measurements of water status, leaf gas exchange and leaf anatomical characteristics were made during the rainy and the dry season in plants of Brownea coccinea and Spatiphylum cannifolium growing along a natural(More)
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