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Title: Specific and non-specific responses of Hyacinth bean (<i style="">Dolichos lablab)</i> to drought stress
Authors: D’souza, Myrene R
Devaraj, V R
Keywords: Antioxidants
antioxidant enzymes
<i style="">Dolichos lablab</i>
drought stress
hyacinth bean proline
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, <i style="">Dolichos lablab</i> (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, H<sub>2</sub>O<sub>2</sub>, 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 <i style="">in vitro</i> 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
Description: 130-139
ISSN: 0975-0967 (Online); 0972-5849 (Print)
Appears in Collections:IJBT Vol.10(1) [January 2011]

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