4.7 Article Proceedings Paper

Photosynthesis, sugars and the regulation of gene expression

期刊

JOURNAL OF EXPERIMENTAL BOTANY
卷 51, 期 -, 页码 407-416

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OXFORD UNIV PRESS
DOI: 10.1093/jexbot/51.suppl_1.407

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photosynthesis; sugars; mannose; Arabidopsis; mutants

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Sugar-mediated regulation of gene expression is a mechanism controlling the expression of many different plant genes. In this review, a compilation of the genes encoding photosynthetic proteins, subject to this mode of regulation, is presented. Several groups have devised different screening strategies to obtain Arabidopsis mutants in sugar sensing and signalling. An overview of these strategies has been included. Sugar-mediated regulation of gene expression is thought to require the hexokinase (HXK) protein. It has previously been shown that one such sugar, mannose, is capable of blocking germination in Arabidopsis. This inhibition is also mediated by HXK and occurs in the low millimolar concentration range. Here, the use of germination on mannose as an effective screening strategy for putative sugar sensing and signalling mutants is reported. T-DNA- and EMS-mutagenized collections were used to isolate 31 mannose-insensitive germination (mig) mutants. With the use of these mutants, a comparison between this screen and other existing sugar-sensing screens is presented.

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