Natural variation in rosette size under salt stress conditions corresponds to developmental differences between Arabidopsis accessions and allelic variation in the LRR-KISS gene
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ArticleAuthors
Julkowska, MagdalenaKlei, Karlijn
Fokkens, Like
Haring, Michel A.
Schranz, M. Eric
Testerink, Christa
KAUST Department
Biological and Environmental Science and Engineering (BESE) DivisionCenter for Desert Agriculture
Date
2016-02-11Online Publication Date
2016-02-11Print Publication Date
2016-04Permanent link to this record
http://hdl.handle.net/10754/608592
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Natural variation among Arabidopsis accessions is an important genetic resource to identify mechanisms underlying plant development and stress tolerance. To evaluate the natural variation in salinity stress tolerance, two large-scale experiments were performed on two populations consisting of 160 Arabidopsis accessions each. Multiple traits, including projected rosette area, and fresh and dry weight were collected as an estimate for salinity tolerance. Our results reveal a correlation between rosette size under salt stress conditions and developmental differences between the accessions grown in control conditions, suggesting that in general larger plants were more salt tolerant. This correlation was less pronounced when plants were grown under severe salt stress conditions. Subsequent genome wide association study (GWAS) revealed associations with novel candidate genes for salinity tolerance such as LRR-KISS (At4g08850), flowering locus KH-domain containing protein and a DUF1639-containing protein. Accessions with high LRR-KISS expression developed larger rosettes under salt stress conditions. Further characterization of allelic variation in candidate genes identified in this study will provide more insight into mechanisms of salt stress tolerance due to enhanced shoot growth.Citation
Natural variation in rosette size under salt stress conditions corresponds to developmental differences between Arabidopsis accessions and allelic variation in the LRR-KISS gene 2016, 67 (8):2127 Journal of Experimental BotanyPublisher
Oxford University Press (OUP)Journal
Journal of Experimental BotanyAdditional Links
http://jxb.oxfordjournals.org/lookup/doi/10.1093/jxb/erw015ae974a485f413a2113503eed53cd6c53
10.1093/jxb/erw015