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The ERF transcription factor EPI1 is a negative regulator of dark-induced and jasmonate-stimulated senescence in Arabidopsis.


ABSTRACT: Identification of the factors involved in the regulation of senescence and the analysis of their function are important for both a biological understanding of the senescence mechanism and the improvement of agricultural productivity. In this study, we identified an ERF gene termed "ERF gene conferring Postharvest longevity Improvement 1" (EPI1) as a possible regulator of senescence in Arabidopsis. We found that EPI1 possesses transcriptional repression activity and that the transgenic plants overexpressing EPI1 and expressing its chimeric repressor, EPI1-SRDX, commonly suppressed the darkness-induced senescence in their excised aerial parts. These transgenic plants additionally maintained a high level of chlorophyll, even after the methyl jasmonate (MeJA) treatment, which stimulated senescence in the dark. In addition, we found that senescence-induced and -reduced genes are down- and upregulated, respectively, in the MeJA-treated transgenic plants under darkness. Our results suggest that EPI1 functions as a negative regulator of the dark-induced and JA-stimulated senescence.

SUBMITTER: Chung K 

PROVIDER: S-EPMC6637254 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature

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The ERF transcription factor EPI1 is a negative regulator of dark-induced and jasmonate-stimulated senescence in <i>Arabidopsis</i>.

Chung KwiMi K   Nakano Toshitsugu T   Fujiwara Sumire S   Mitsuda Nobutaka N   Otsuki Namie N   Tsujimoto-Inui Yayoi Y   Naito Yuki Y   Ohme-Takagi Masaru M   Suzuki Kaoru K  

Plant biotechnology (Tokyo, Japan) 20160409 4


Identification of the factors involved in the regulation of senescence and the analysis of their function are important for both a biological understanding of the senescence mechanism and the improvement of agricultural productivity. In this study, we identified an <i>ERF</i> gene termed <i>"ERF gene conferring Postharvest longevity Improvement 1</i>" (EPI1) as a possible regulator of senescence in <i>Arabidopsis</i>. We found that EPI1 possesses transcriptional repression activity and that the  ...[more]

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