Abstract:
This study was carried out to investigate
the effect of salinity on responses of Mung
bean plant which were measured by a
range of physiological parameters:
chlorophyll, proline and Nitrate reductase
activity.
Salt concentrations (0, 50, 100, and 150
mEq.L-1) were applied to Mung bean plant
that grown in plastic pots filled with a
mixture of sand and peat (2:1 v/v).
As a result of analyzing the cultures under
salinity stress, it was determined that the
chlorophyll decreased significantly. At low
salinity regimes, a slight decrease was
noted in chlorophyll a and b, and total
chlorophyll content, but under high
salinity conditions a significant reduction
in the content of these pigments was
observed. The chlorophyll a: chlorophyll b
ratio also varied significantly under
salinity stress, while the proline
concentration increased considerably
under salinity restraint. Therefore, the
stress induced by salt caused an
accumulation of proline. Nitrate reductase
activity (NRA) decreased progressively
with increasing salinity. This activity was
inhibited in both leaves and roots under
salinity
