Changes in Activities of Antioxidant Enzymes in Sunflower Leaves of Different Ages
作者： R.K. Sairam , D.V. Singh , G.C. Srivastava
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摘要: Role of superoxide dismutase isozymes and other antioxidant enzymes was studied in relation to leaf age sunflower (Helianthus annuus L. cv. ACC 1508) at pre-flowering grain filling stages. Relative water content (RWC) did not change much leaves different the two Protein declined continuously from youngest oldest leaf, while chlorophyll (Chl) carotenoids (Car) contents increased down 7th/9th subsequent older leaves. Protein, Chl Car were higher than seed stage. Superoxide (SOD), its isozymes, ascorbate peroxidase (APO) catalase (CAT) activities highest 9th SOD APO filling, except senescent (13th, 15th) Among Cu/Zn-SOD Mn-SOD accounted for most total SOD, only marginal activity observed Fe-SOD. Peroxidase stage 13th
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