Abstract: The changes in the water potentials in the environment can cause drastic negative effect in the cellular activities of plants. Drought stress being one of the major abiotic stresses results in reduced growth and productivity. Various morphological, biochemical and physiological mitigations occur within the plant system to cope up with effects of such stress. Results of the study intiated to evaluate the responses of the PEG- 6000 induced drought stress in in-vitro regenerated plants of Sree Reshmi cultivar of Colocasia esculenta are presented here under. The induced stress had the negative effect on fresh and dry weight, plant height, relative water content and total chlorophyll content. Levels of certain oxidative stress markers viz., hydrogen peroxide, proline, malondialdehyde, ascorbic acid and glutathione were elevated relative to control. Antioxidative enzymes, ascorbate peroxidase, gauaicol peroxidase and glutathione reductase were significantly enhanced, whereas, activity of catalase was reduced in time dependent manner. β- Amylase, a metabolic enzyme was moderately enhanced in the stressed plants. The plants were able to rehydrate and grow upon re-watering. The paper discusses contribution of above mentioned factors to abiotic stress response in in-vitro regenerated Colocasia esculenta.
Keywords: Colocasia esculenta, Sree Reshmi cv. induced water stress, PEG-6000, antioxidant enzymes, drought tolerance.
Title: Responses of In-Vitro Regenerated Colocasia esculenta (L.) Schott to PEG induced drought stress
Author: Anupama, N., Devaraj, V.R., Tejavathi, D.H.
International Journal of Life Sciences Research
ISSN 2348-313X (Print), ISSN 2348-3148 (online)
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