One of two tandem Arabidopsis genes homologous to monosaccharide transporters is senescence-associated

被引：94

作者：

Quirino, BF

Reiter, WD

Amasino, RD

机构：

[1] Univ Wisconsin, Dept Biochem, Madison, WI 53706 USA

[2] Univ Connecticut, Dept Mol & Cell Biol, Storrs, CT 06269 USA

来源：

PLANT MOLECULAR BIOLOGY | 2001年 / 46卷 / 04期

关键词：

differential expression; gene duplication; senescence; senescence-associated gene; sugar transporter; vascular tissue;

D O I：

10.1023/A:1010639015959

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

A gene designated SFP1, which is similar to major facilitator superfamily monosaccharide transporters, is induced during leaf senescence. Genomic sequence analysis identified a second highly similar and closely linked gene, SFP2, suggesting that SFP1 and SFP2 may have arisen through a recent duplication event. However, RNA gel-blot analyses and histochemical localization of a reporter gene activity in transgenic plants show that SFP1 and SFP2 are differentially regulated and that only SFP1 is induced during leaf senescence. The increase in SFP1 gene expression during leaf senescence is paralleled by an accumulation of monosaccharides. Possible roles for SFP1 in sugar transport during leaf senescence are discussed.

引用

页码：447 / 457

页数：11

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