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ROLE OF NON-STRUCTURAL CARBOHYDRATE AND ITS CATABOLISM ASSOCIATED WITH SUB 1 QTL IN RICE SUBJECTED TO COMPLETE SUBMERGENCE

Published online by Cambridge University Press:  17 May 2012

DEBABRATA PANDA  and
RAMANI KUMAR SARKAR
DEBABRATA PANDA*
Affiliation:
Central Rice Research Institute, Cuttack-753 006, Odisha, India Rubber Research Institute of India Tura, Meghalaya-794 001, India
RAMANI KUMAR SARKAR
Affiliation:
Central Rice Research Institute, Cuttack-753 006, Odisha, India
*
§Corresponding author. Email: [email protected]
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Summary

The present study is to characterise the non-structural carbohydrate (NSC) status and its catabolism along with elongation growth in rice cultivars either possessing or not possessing the Sub 1 quantitative trait locus (QTL), i.e. Swarna and Swarna Sub1 exposed to seven days of complete submergence. During submergence, Swarna accelerated the rate of stem and leaf elongation and rapidly consumed NSC. In contrast, Swarna Sub1 consumed energy resources more slowly and maintained similar growth rate to that of non-submerged plants. Swarna Sub1 showed better utilisation of carbohydrate than that of Swarna by progressive induction of alcohol dehydrogenase, starch phosphorylase and total and α-amylase enzyme activity during submergence. Overall, submergence tolerance conferred by the Swarna Sub1 QTL is correlated with better maintenance and utilisation of NSC than that of Swarna.

Type
Research Article
Information
Experimental Agriculture , Volume 48 , Issue 4 , October 2012 , pp. 502 - 512
Copyright
Copyright © Cambridge University Press 2012

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