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ORE9, an F-box protein that regulates leaf senescence in Arabidopsis

Title
ORE9, an F-box protein that regulates leaf senescence in Arabidopsis
Authors
Woo, HRChung, KMPark, JHOh, SAAhn, THong, SHJang, SKNam, HG
POSTECH Authors
Jang, SKNam, HG
Date Issued
Jan-2001
Publisher
AMER SOC PLANT PHYSIOLOGISTS
Abstract
Senescence is a sequence of biochemical and physiological events that constitute the final stage of development. The identification of genes that alter senescence has practical value and is helpful in revealing pathways that influence senescence. However, the genetic mechanisms of senescence are largely unknown. The leaf of the oresara9 (ore9) mutant of Arabidopsis exhibits increased longevity during age-dependent natural senescence by delaying the onset of various senescence symptoms. It also displays delayed senescence symptoms during hormone-modulated senescence. Map-based cloning of ORE9 identified a 693-amino acid polypeptide containing an F-box motif and 18 leucine-rich repeats. The F-box motif of ORE9 interacts with ASK1 (Arabidopsis Skp1-like 1), a component of the plant SCF complex. These results suggest that ORE9 functions to limit leaf longevity by removing, through ubiquitin-dependent proteolysis, target proteins that are required to delay the leaf senescence program in Arabiclopsis.
Keywords
UBIQUITIN-DEPENDENT PROTEOLYSIS; GENE-EXPRESSION; ABSCISIC-ACID; DIFFERENTIAL EXPRESSION; SIGNAL-TRANSDUCTION; GROWTH-REGULATORS; FESTUCA-PRATENSIS; MESSENGER-RNAS; AUXIN RESPONSE; CDNA CLONES
URI
http://oasis.postech.ac.kr/handle/2014.oak/19439
ISSN
1040-4651
Article Type
Article
Citation
PLANT CELL, vol. 13, no. 8, page. 1779 - 1790, 2001-01
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 NAM, HONG GIL
Div of Integrative Biosci & Biotech
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