Hormonal Response and Seed Viabil ity of Parteresia coarctata,a Brackish Water Species |
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Authors: | C. V. Anita G. M. Reddy |
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Affiliation: | 1. Department of Genetics, Osmania University, Hyderabad, 500007, India
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Abstract: | Stimulation of α-amylase activity was observed in Porteresia coarctata immature seeds (20-day-old) when de-embryonated prewashed half seeds were incubated in media containing gibberellic acid (GA3, 10?5M). No such activity was observed in mature seeds even when GA3 concentration was increased up to five fold. ABA suppressed the GA3 enhanced α-amylase synthesis up to nearly 70% in the immature seeds. Absence of this enzyme activity in mature seeds may be due to high levels of ABA. The immature aleurone showed a 23 kD polypeptide induced by ABA. |
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