RRC ID 32254
Author Shibuya K, Shimizu K, Niki T, Ichimura K.
Title Identification of a NAC transcription factor, EPHEMERAL1, that controls petal senescence in Japanese morning glory.
Journal Plant J.
Abstract In flowering plants, floral longevity is species-specific and is closely linked to reproductive strategy; petal senescence, a type of programmed cell death (PCD), is a highly regulated developmental process. However, little is known about regulatory pathways for cell death in petal senescence, which is developmentally controlled in an age-dependent manner. Here, we show that a NAC transcription factor, designated EPHEMERAL1 (EPH1), positively regulates PCD during petal senescence in the ephemeral flowers of Japanese morning glory (Ipomoea nil). EPH1 expression is induced independently of ethylene signaling, and suppression of EPH1 resulted in Japanese morning glory flowers that are in bloom until the second day. The suppressed expression of EPH1 delays progression of PCD, possibly through suppression of the expression of PCD-related genes, including genes for plant caspase and autophagy in the petals. Our data further suggest that EPH1 is involved in the regulation of ethylene-accelerated petal senescence. In this study, we identified a key regulator of PCD in petal senescence, which will facilitate further elucidation of the regulatory network of petal senescence.
Volume 79(6)
Pages 1044-51
Published 2014-9
DOI 10.1111/tpj.12605
PMID 24961791
MeSH Apoptosis* Ethylenes / pharmacology* Flowers / drug effects Flowers / genetics Flowers / physiology Gene Expression Regulation, Plant* Ipomoea nil / drug effects Ipomoea nil / genetics* Ipomoea nil / physiology Organ Specificity Phenotype Plant Growth Regulators / pharmacology* Plant Leaves / drug effects Plant Leaves / genetics Plant Leaves / physiology Plant Proteins / genetics Plant Proteins / metabolism Plant Roots / drug effects Plant Roots / genetics Plant Roots / physiology Plant Stems / drug effects Plant Stems / genetics Plant Stems / physiology Plants, Genetically Modified Real-Time Polymerase Chain Reaction Time Factors Transcription Factors / genetics* Transcription Factors / metabolism Up-Regulation
IF 5.726
Times Cited 7
Morning Glory Violet、EST clones