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Lee, Seul Bi
식물 노화·수명 연구단
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Glycosyltransferase-Like RSE1 Negatively Regulates Leaf Senescence Through Salicylic Acid Signaling in Arabidopsis

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Title
Glycosyltransferase-Like RSE1 Negatively Regulates Leaf Senescence Through Salicylic Acid Signaling in Arabidopsis
Author(s)
Seulbee Lee; Myung-Hee Kim; Jae Ho Lee; Jieun Jeon; June M. Kwak; Yun Ju Kim
Publication Date
2020-05
Journal
FRONTIERS IN PLANT SCIENCE, v.11, pp.1 - 13
Publisher
FRONTIERS MEDIA SA
Abstract
© 2020 Lee, Kim, Lee, Jeon, Kwak and Kim. Leaf senescence is a developmental process designed for nutrient recycling and relocation to maximize growth competence and reproductive capacity of plants. Thus, plants integrate developmental and environmental signals to precisely control senescence. To genetically dissect the complex regulatory mechanism underlying leaf senescence, we identified an early leaf senescence mutant, rse1. RSE1 encodes a putative glycosyltransferase. Loss-of-function mutations in RSE1 resulted in precocious leaf yellowing and up-regulation of senescence marker genes, indicating enhanced leaf senescence. Transcriptome analysis revealed that salicylic acid (SA) and defense signaling cascades were up-regulated in rse1 prior to the onset of leaf senescence. We found that SA accumulation was significantly increased in rse1. The rse1 phenotypes are dependent on SA-INDUCTION DEFICIENT 2 (SID2), supporting a role of SA in accelerated leaf senescence in rse1. Furthermore, RSE1 protein was localized to the cell wall, implying a possible link between the cell wall and RSE1 function. Together, we show that RSE1 negatively modulates leaf senescence through an SID2-dependent SA signaling pathway
URI
https://pr.ibs.re.kr/handle/8788114/7867
DOI
10.3389/fpls.2020.00551
ISSN
1664-462X
Appears in Collections:
Center for Plant Aging Research (식물 노화·수명 연구단) > 1. Journal Papers (저널논문)
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