Efeito do estresse salino em plantas de feijoeiro.

Abstract

The objective of this study went evaluate the effect of saline stress on physiologic parameters of the bean plant. The experiment was carried out in the lysimeter station at the Irrigation and Drainage experimental area, in campus of the Universidade Federal de Viçosa (UFV). The treatments consisted of seven leaching fractions corresponding to 3, 14, 16, 23, 25, 31 and 40% of the irrigation water depth; for the leaching fraction of 3%, the fresh water was used (0.07 dS m-1), whereas the saline water was used for the other fractions (2 dS m-1). The stoma conductance, and the transpiration rate were measured, in the bean flowering and fulfillment periods, by using a portable, infrared gas analyzer, I LI- 6400 model. According to the results, the following conclusions may be drawn: the osmotic potential decreased, lineally, with increment in CEes; the soil salinity significantly reduced the physiologic parameters (stomatic conductance and transpiration) of the bean plant, while the temperature foliate it increased, lineally, with increment in CEes.