Cited time in webofscience Cited time in scopus

NORE1/SAUL1 integrates temperature-dependent defense programs involving SGT1b and PAD4 pathways and leaf senescence in Arabidopsis

Title
NORE1/SAUL1 integrates temperature-dependent defense programs involving SGT1b and PAD4 pathways and leaf senescence in Arabidopsis
Author(s)
Lee, Il HwanLee, In ChulKim, JeongsikKim, Jin HeeChung, Eui-HwanKim, Hyo JungPark, Su JinKim, Yong MinKang, Sin KyuNam, Hong GilWoo, Hye RyunLim, Pyung Ok
Issued Date
2016-10
Citation
Physiologia Plantarum, v.158, no.2, pp.180 - 199
Type
Article
Keywords
AGE-RELATED RESISTANCECELL-DEATHDisease ResistanceE3 UBIQUITIN LIGASEF-BOX PROTEINHYPERSENSITIVE RESPONSEPLANT INNATE IMMUNITYSALICYLIC-ACIDSYSTemIC ACQUIRED-RESISTANCETranscription Factor
ISSN
0031-9317
Abstract
Leaf senescence is not only primarily governed by developmental age but also influenced by various internal and external factors. Although some genes that control leaf senescence have been identified, the detailed regulatory mechanisms underlying integration of diverse senescence-associated signals into the senescence programs remain to be elucidated. To dissect the regulatory pathways involved in leaf senescence, we isolated the not oresara1-1 (nore1-1) mutant showing accelerated leaf senescence phenotypes from an EMS-mutagenized Arabidopsis thaliana population. We found that altered transcriptional programs in defense response-related processes were associated with the accelerated leaf senescence phenotypes observed in nore1-1 through microarray analysis. The nore1-1 mutation activated defense program, leading to enhanced disease resistance. Intriguingly, high ambient temperature effectively suppresses the early senescence and death phenotypes of nore1-1. The gene responsible for the phenotypes of nore1-1 contains a missense mutation in SENESCENCE-ASSOCIATED E3 UBIQUITIN LIGASE 1 (SAUL1), which was reported as a negative regulator of premature senescence in the light intensity- and PHYTOALEXIN DEFICIENT 4 (PAD4)-dependent manner. Through extensive double mutant analyses, we recently identified suppressor of the G2 Allele of SKP1b (SGT1b), one of the positive regulators for disease resistance conferred by many resistance (R) proteins, as a downstream signaling component in NORE1-mediated senescence and cell death pathways. In conclusion, NORE1/SAUL1 is a key factor integrating signals from temperature-dependent defense programs and leaf senescence in Arabidopsis. These findings provide a new insight that plants might utilize defense response program in regulating leaf senescence process, possibly through recruiting the related genes during the evolution of the leaf senescence program. © 2016 Scandinavian Plant Physiology Society
URI
http://hdl.handle.net/20.500.11750/5075
DOI
10.1111/ppl.12434
Publisher
Wiley Blackwell
Related Researcher
  • 우혜련 Woo, Hye Ryun
  • Research Interests Genome biology; Epigenomics; Plant senescence
Files in This Item:

There are no files associated with this item.

Appears in Collections:
Department of New Biology CBRG(Complex Biology Research Group) 1. Journal Articles
Department of New Biology Lab of Plant Molecular Communication 1. Journal Articles
Department of New Biology Plant Senescence Laboratory 1. Journal Articles

qrcode

  • twitter
  • facebook
  • mendeley

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE