Autophagy regulates progression of programmed cell death during petal senescence in Japanese morning glory

Petal senescence is a type of programmed cell death (PCD) that is tightly regulated by multiple genes. We recently reported that a putative membrane protein, InPSR26, regulates progression of PCD during petal senescence in Japanese morning glory (Ipomoea nil). Reduced InPSR26 expression in transgeni...

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Published inAutophagy Vol. 5; no. 4; pp. 546 - 547
Main Authors Shibuya, Kenichi, Yamada, Tetsuya, Ichimura, Kazuo
Format Journal Article
LanguageEnglish
Published United States Taylor & Francis 16.05.2009
Subjects
Apoptosis
Autophagy
Binding
Biology
Bioscience
Calcium
Cancer
Cell
Cellular Senescence
Cycle
Flowers - cytology
Flowers - growth & development
Gene Expression Regulation, Plant
Ipomoea nil - cytology
Ipomoea nil - genetics
Landes
Models, Biological
Organogenesis
Proteins
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Summary:Petal senescence is a type of programmed cell death (PCD) that is tightly regulated by multiple genes. We recently reported that a putative membrane protein, InPSR26, regulates progression of PCD during petal senescence in Japanese morning glory (Ipomoea nil). Reduced InPSR26 expression in transgenic plants (PSR26r lines) resulted in accelerated petal senescence with hastened development of PCD symptoms, and transcript levels of autophagy-related genes were reduced in the petals. Autophagy visualized by monodansylcadaverine staining indicated reduced autophagic activity in the PSR26r plants. The results from our recent studies suggest that InPSR26 acts to delay the progression of PCD during petal senescence, possibly through regulation of the autophagic process. In this addendum, we discuss the role of autophagy in petal senescence as it relates to these findings.
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ISSN:1554-8627
1554-8635
DOI:10.4161/auto.5.4.8310