Cited 4 time in webofscience Cited 5 time in scopus

High Ambient Temperature Accelerates Leaf Senescence via PHYTOCHROME-INTERACTING FACTOR 4 and 5 in Arabidopsis

Title
High Ambient Temperature Accelerates Leaf Senescence via PHYTOCHROME-INTERACTING FACTOR 4 and 5 in Arabidopsis
Authors
Kim, ChanheeKim, Sun JiJeong, JinkilPark, EunaeOh, EunkyooPark, Youn-IlLim, Pyung OkChoi, Giltsu
DGIST Authors
Kim, Chanhee; Kim, Sun Ji; Jeong, Jinkil; Park, Eunae; Oh, Eunkyoo; Park, Youn-Il; Lim, Pyung Ok; Choi, Giltsu
Issue Date
2020-07
Citation
Molecules and Cells, 43(7), 645-661
Type
Article
Article Type
Article
Author Keywords
ArabidopsisPIF4phytochromesenescencetemperature
Keywords
PIF4AGEMEDIATED HYPOCOTYL ELONGATIONCIRCADIAN CLOCKBODY-TEMPERATURELIGHT RECEPTORCRYPTOCHROME 1LIFE-SPANTRANSCRIPTIONGROWTH
ISSN
1016-8478
Abstract
Leaf senescence is a developmental process by which a plant actively remobilizes nutrients from aged and photosynthetically inefficient leaves to young growing ones by disassembling organelles and degrading macromolecules. Senescence is accelerated by age and environmental stresses such as prolonged darkness. Phytochrome B (phyB) inhibits leaf senescence by inhibiting phytochrome-interacting factor 4 (PIF4) and PIF5 in prolonged darkness. However, it remains unknown whether phyB mediates the temperature signal that regulates leaf senescence. We found the light-activated form of phyB (Pfr) remains active at least four days after a transfer to darkness at 20°C but is inactivated more rapidly at 28°C. This faster inactivation of Pfr further increases PIF4 protein levels at the higher ambient temperature. In addition, PIF4 mRNA levels rise faster after the transfer to darkness at high ambient temperature via a mechanism that depends on ELF3 but not phyB. Increased PIF4 protein then binds to the ORE1 promoter and activates its expression together with ABA and ethylene signaling, accelerating leaf senescence at high ambient temperature. Our results support a role for the phy-PIF signaling module in integrating not only light signaling but also temperature signaling in the regulation of leaf senescence.
URI
http://hdl.handle.net/20.500.11750/12336
DOI
10.14348/molcells.2020.0117
Publisher
The Korean Society for Molecular and Cellular Biology
Related Researcher
  • Author Lim, Pyung Ok Plant Senescence Laboratory
  • Research Interests Aging and programmen cell death in plants; RNA-based regulation of leaf aging; Synthetic genetics-based aging reprogramming
Files:
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Collection:
Department of New BiologyPlant Senescence Laboratory1. Journal Articles


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