Programming of plant leaf senescence with temporal and inter-organellar coordination of transcriptome in arabidopsis

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Title
Programming of plant leaf senescence with temporal and inter-organellar coordination of transcriptome in arabidopsis
Author(s)
Hye Ryun Woo; Hee Jung Koo; Jeongsik Kim; Hyobin Jeong; Yang J.O.; Il Hwan Lee; Jun J.H.; Seung Hee Choi; Su Jin Park; Byeongsoo Kang; You Wang Kim; Bong-Kwan Phee; Jin Hee Kim; Seo C.; Park C.; Kim S.C.; Park S.; Lee B.; Lee S.; Daehee Hwang; Hong Gil Nam; Lim P.O.
Publication Date
2016-05
Journal
PLANT PHYSIOLOGY, v.171, no.1, pp.452 - 467
Publisher
AMER SOC PLANT BIOLOGISTS
Abstract
Plant leaves, harvesting light energy and fixing CO2, are a major source of foods on the earth. Leaves undergo developmental and physiological shifts during their lifespan, ending with senescence and death. We characterized the key regulatory features of the leaf transcriptome during aging by analyzing total- and small-RNA transcriptomes throughout the lifespan of Arabidopsis (Arabidopsis thaliana) leaves at multidimensions, including age, RNA-type, and organelle. Intriguingly, senescing leaves showed more coordinated temporal changes in transcriptomes than growing leaves, with sophisticated regulatory networks comprising transcription factors and diverse small regulatory RNAs. The chloroplast transcriptome, but not the mitochondrial transcriptome, showed major changes during leaf aging, with a strongly shared expression pattern of nuclear transcripts encoding chloroplast-targeted proteins. Thus, unlike animal aging, leaf senescence proceeds with tight temporal and distinct interorganellar coordination of various transcriptomes that would be critical for the highly regulated degeneration and nutrient recycling contributing to plant fitness and productivity. © 2016 American Society of Plant Biologists. All rights reserved
URI
https://pr.ibs.re.kr/handle/8788114/2515
ISSN
0032-0889
Appears in Collections:
Center for Plant Aging Research (식물 노화·수명 연구단) > Journal Papers (저널논문)
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