Natural allelic variation of GVS1 confers diversity in the regulation of leaf senescence in Arabidopsis

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Title
Natural allelic variation of GVS1 confers diversity in the regulation of leaf senescence in Arabidopsis
Author(s)
Jae Il Lyu; Jin Hee Kim; Hyosub Chu; Mark A. Taylor; Sukjoon Jung; Seung Hee Baek; Hye Ryun Woo; Pyung Ok Lim; Jeongsik Kim
Publication Date
2019-03
Journal
NEW PHYTOLOGIST, v.221, no.4, pp.2320 - 2334
Publisher
WILEY
Abstract
Leaf senescence affects plant fitness. Plants that evolve in different environments are expected to acquire distinct regulations of leaf senescence. However, the adaptive and evolutionary roles of leaf senescence are largely unknown. We investigated leaf senescence in 259 natural accessions of Arabidopsis by quantitatively assaying dark-induced senescence responses using a high-throughput chlorophyll fluorescence imaging system. A meta-analysis of our data with phenotypic and climatic information demonstrated biological and environmental links with leaf senescence. We further performed genome-wide association mapping to identify the genetic loci underlying the diversity of leaf senescence responses. We uncovered a new locus, Genetic Variants in leaf Senescence (GVS1), with high similarity to reductase, where a single nonsynonymous nucleotide substitution at GVS1 mediates the diversity of the senescence trait. Loss-of-function mutations of GVS1 in Columbia-0 delayed leaf senescence and increased sensitivity to oxidative stress, suggesting that this GVS1 variant promotes optimal responses to developmental and environmental signals. Intriguingly, gvs1 loss-of-function mutants display allele- and accession-dependent phenotypes, revealing the functional diversity of GVS1 alleles not only in leaf senescence, but also oxidative stress. Our discovery of GVS1 as the genetic basis of natural variation in senescence programs reinforces its adaptive potential in modulating life histories across diverse environments. C. 2018 New Phytologist Trust
URI
https://pr.ibs.re.kr/handle/8788114/5676
ISSN
0028-646X
Appears in Collections:
Center for Plant Aging Research (식물 노화·수명 연구단) > Journal Papers (저널논문)
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