The roles of ethylene and transcription factors in the regulation of onset of leaf senescence

Leaf senescence is the last stage of leaf development and is accompanied by cell death. In contrast to senescence in individual organisms that leads to death, leaf senescence is associated with dynamic processes that include the translocation of nutrients from old leaves to newly developing or stora...

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Published inFrontiers in plant science Vol. 5; p. 650
Main Author Koyama, Tomotsugu
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Media S.A 25.11.2014
Subjects
AP2/ERF
ethylene
leaf senescence
NAc
Plant Science
tran
TCP
NAC
WRKY
transcription factor
AP2/ERF
ethylene
leaf development
leaf senescence
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Summary:Leaf senescence is the last stage of leaf development and is accompanied by cell death. In contrast to senescence in individual organisms that leads to death, leaf senescence is associated with dynamic processes that include the translocation of nutrients from old leaves to newly developing or storage tissues within the same plant. The onset of leaf senescence is largely regulated by age and internal and external stimuli, which include the plant hormone ethylene. Earlier studies have documented the important role of ethylene in the regulation of leaf senescence. The production of ethylene coincides with the onset of leaf senescence, whereas the application of ethylene to plants induces precocious leaf senescence. Recently, many studies have described the components of ethylene signaling and biosynthetic pathways that are involved in modulating the onset of leaf senescence. Particularly, transcription factors (TFs) integrate ethylene signals with those from environmental and developmental factors to accelerate or delay leaf senescence. This review aims to discuss the regulatory cascade involving ethylene and TFs in the regulation of onset of leaf senescence.
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This article was submitted to Plant Physiology, a section of the journal Frontiers in Plant Science.
Reviewed by: Victoria Fernandez, Technical University of Madrid, Spain; Veronica Graciela Maurino, Heinrich-Heine-University Duesseldorf, Germany
Edited by: Domenico De Martinis, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Italy
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2014.00650