Water Deficit Effects on Proline, Cell Wall Elasticity and Osmotic Potential among seven Avena species at Vegetative and Flowering stages

Author: H. C. Pandey*, M. J. Baig and Nilamani Dikshit

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Abstract

This paper has concentrated to quantify the effect of water limitation in Avena species at different phenophases in terms of plant water relations and osmotic adjustment responses triggered by drought stress. Relative Water content (RWC) decreased in all the species when the drought period progressed in subsequent days after with-holding water supply. At vegetative stage all the seven species of Avena grouped under three categories in response to the extent of moisture stress. The group one comprised of three species viz. A. brevis, A. maroccana and A. sterilis showing the maximum stress up to 16th day from with-holding the water supply. The second group comprised of three species (A. strigosa, A. vaviloviana and A. abyssinica) showing tolerance up to 12th day and the third group in which the stress tolerance was recorded up to 9th day comprised of only one species i.e. A. sativa. Among all these seven species evaluated for drought tolerance, three species belonging to group Ist showe

Keywords

Drought, water relations, tolerance, climate change, oat, stress.