NDLI: Molecular regulation of starch accumulation in rice seedling leaves in response to salt stress

Content Provider	Springer Nature Link
Author	Chen, Huai Ju Chen, Jia Yi Wang, Shu Jen
Copyright Year	2007
Abstract	In this report we show that the starch content decreased in NaCl-stressed rice (Oryza sativa L.) seedling leaves during the daytime. Because photosynthetic efficiency and starch degradation enzyme activity were not significantly affected by the high salt, it is likely that this effect results from repression of starch biosynthesis. To determine the regulatory mechanism, the activities of enzymes such as ADP-glucose pyrophosphorylase (AGPase), granule-bound starch synthase (GBSS), soluble starch synthase (SSS) and starch branching enzyme (SBE) involved in starch synthetic pathway were examined. Data suggest that NaCl-induced repression of GBSS activity was the most significant factor reducing starch accumulation. Based on real-time RT-PCR analysis, the effect of salinity on GBSS expression was primarily controlled on the transcriptional level. Furthermore, the salt-induced decrease of both GBSSI and GBSSII gene expressions could be mostly contributed by ion-specific effect and not by osmotic stress. Although the mRNA accumulation of GBSSI and GBSSII can be down-regulated by exogenous ABA, the negative influence of salt stress on GBSSI and II gene expression could be chiefly mediated via an ABA-independent pathway.
Starting Page	135
Ending Page	142
Page Count	8
File Format	PDF
ISSN	01375881
Journal	Acta Physiologiae Plantarum
Volume Number	30
Issue Number	2
e-ISSN	18611664
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-10-09
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Abscisic acid Granule-bound starch synthase Oryza sativa Salt stress Starch Agriculture Plant Anatomy/Development Plant Pathology Plant Biochemistry Plant Genetics & Genomics Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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