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Indian Journal of Biotechnology (IJBT) >
IJBT Vol.10 [2011] >
IJBT Vol.10(1) [January 2011] >
| Title: | Specific and non-specific responses of Hyacinth bean (Dolichos lablab) to drought stress |
| Authors: | D’souza, Myrene R
Devaraj, V R |
| Keywords: | Antioxidants
antioxidant enzymes
Dolichos lablab
drought stress
hyacinth bean proline
malondialdehyde |
| Issue Date: | Jan-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Drought
and salinity stress are the major causes of historic and modern agricultural
productivity losses throughout the world. The availability of irrigation water
is a challenge for many countries that have scarce water resources, yet are
highly dependent on agriculture as a means of revenue. Effect of drought on Hyacinth
bean, Dolichos lablab (HA-4 cultivar)
was evaluated in 10-d-old seedlings for 8 d after withholding water. The stress
reduced dry and fresh weight, leaf number, surface area, root and shoot length,
total chlorophyll and relative water content. Oxidative stress markers, H2O2,
glutathione, malondialdehyde, proline, ascorbic acid, total phenols, and total
soluble sugars were significantly elevated. Drought enhanced antioxidant
enzymes, peroxidase and glutathione reductase, and reduced catalase in a time
dependent manner in the leaves. POX and CAT in roots showed inverse
relationship with the duration of stress, whereas GR exhibited increased
activity. The metabolic activitiy of enzymes, β-amylase and acid phosphatase,
increased temporally in leaves and roots. Intensity of isozymes correlated with
in vitro levels under stress. The
plant showed ability to rehydrate and grow upon re-watering, and levels of
antioxidant components correlated with drought tolerance of the plant |
| Page(s): | 130-139 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0967 (Online); 0972-5849 (Print) |
| Source: | IJBT Vol.10(1) [January 2011]
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