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KMID : 0578320150380050390
Molecules and Cells
2015 Volume.38 No. 5 p.390 ~ p.395
The Divergent Roles of STAYGREEN (SGR) Homologs in Chlorophyll Degradation
Sakuraba Yasuhito

Park So-Yon
Paek Nam-Chon
Abstract
Degradation of chlorophyll (Chl) by Chl catabolic enzymes (CCEs) causes the loss of green color that typically occurs during senescence of leaves. In addition to CCEs, STAYGREEN1 (SGR1) functions as a key regulator of Chl degradation. Although sgr1 mutants in many plant species exhibit a stay-green phenotype, the biochemical function of the SGR1 protein remains elusive. Many recent studies have examined the physiological and molecular roles of SGR1 and its homologs (SGR2 and SGR-LIKE) in Chl metabolism, finding that these proteins have different roles in different species. In this review, we summarize the recent studies on SGR and discuss the most likely functions of SGR homologs.
KEYWORD
abiotic stress, chlorophyll catabolic enzymes, chlorophyll degradation, STAYGREEN (SGR), SGR-LIKE (SGRL)
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