International Journal of Pharma and Bio Sciences
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10.22376/ijpbs.2019.10.1.p1-12
Volume 5 Issue 1
2014 (January - March)
ALTERATIONS IN ANTIOXIDANT METABOLISM AND GROWTH IN PASPALUM SCROBICULATUM L. VARIETIES SUBJECTED TO DROUGHT STRESS
Drought is a major factor limiting crop productivity worldwide. Plants have different mechanism to cope with water scarcity. Hence, the aim of the present study was to understand the effect of drought stress on growth and anti-oxidant activities of two varieties of lessThan i greaterThan Paspalum scrobiculatum lessThan b greaterThan . lessThan /b greaterThan lessThan /i greaterThan The experiments were carried out in a pot culture. Two varieties of lessThan i greaterThan P scrobiculatum lessThan /i greaterThan L. were selected for the study. Three regimes of drought stress (3, 5 and 7 DID) were imposed from 20 to 40 DAS. The samples were collected in 40, 60 and 80 DAS and were analyzed for estimating growth parameters and antioxidant enzymes. The data clearly showed increased drought stress declines shoot length, total leaf area and shoot fresh and dry weight whereas, root length, root fresh and dry weight increased. The enzyme activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), catalase (CAT), ascorbic acid (AA) and α-tocopherol (a-TOC) increased in both root and shoot of lessThan i greaterThan P. scrobiculatum lessThan /i greaterThan under drought stress, supports its drought tolerance adaptations. In addition, both the varieties showed a tendency of recovery when the drought stresses were removed.
MIR AAFAQ AHMAD, P.V. MURALI AND G. MARIMUTHU
Antioxidant enzymes, water potential, adaptation, drought stress
1117-1131