Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10870579 | FEBS Letters | 2014 | 8 Pages |
Abstract
During leaf senescence in Arabidopsis, STAYGREEN 1 (SGR1) and SGR2 regulate chlorophyll degradation positively and negatively, respectively. SGR-LIKE (SGRL) is also expressed in pre-senescing leaves, but its function remains largely unknown. Here we show that under abiotic stress, Arabidopsis plants overexpressing SGRL exhibit early leaf yellowing and sgrl-1 mutants exhibit persistent green color of leaves. Under salt stress, SGR1 and SGRL act synergistically for rapid Chl degradation prior to senescence. Furthermore, SGRL forms homo- and heterodimers with SGR1 and SGR2 in vivo, and interacts with LHCII and chlorophyll catabolic enzymes. The role of SGRL under abiotic stress is discussed.
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Related Topics
Life Sciences
Agricultural and Biological Sciences
Plant Science
Authors
Yasuhito Sakuraba, Dami Kim, Ye-Sol Kim, Stefan Hörtensteiner, Nam-Chon Paek,