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Natural variation in CTB4a enhances rice adaptation to cold habitats
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Journal Article
Natural variation in CTB4a enhances rice adaptation to cold habitats
2017
Overview
Low temperature is a major factor limiting rice productivity and geographical distribution. Improved cold tolerance and expanded cultivation to high-altitude or high-latitude regions would help meet growing rice demand. Here we explored a QTL for cold tolerance and cloned the gene,
CTB4a
(cold tolerance at booting stage), encoding a conserved leucine-rich repeat receptor-like kinase. We show that different
CTB4a
alleles confer distinct levels of cold tolerance and selection for variation in the
CTB4a
promoter region has occurred on the basis of environmental temperature. The newly generated cold-tolerant haplotype
Tej
-Hap-KMXBG was retained by artificial selection during temperate
japonica
evolution in cold habitats for low-temperature acclimation. Moreover, CTB4a interacts with AtpB, a beta subunit of ATP synthase. Upregulation of
CTB4a
correlates with increased ATP synthase activity, ATP content, enhanced seed setting and improved yield under cold stress conditions. These findings suggest strategies to improve cold tolerance in crop plants.
Low temperature is a major factor limiting productivity in rice. Here the authors show that the
CTB4a
gene confers cold tolerance to
japonica
varieties adapted to cold habitats at the booting stage of development, and propose that CTB4a acts via an interaction with the beta subunit of ATP synthase.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 13/44
/ 13/89
/ 38/111
/ 38/77
/ 38/79
/ 38/90
/ 82/80
/ 96/63
/ Adaptation, Physiological - genetics
/ Altitude
/ ATP
/ Chromosomes, Plant - genetics
/ Cloning
/ Gene Expression Regulation, Plant
/ Genes
/ Humanities and Social Sciences
/ Kinases
/ Promoter Regions, Genetic - genetics
/ Quantitative Trait Loci - genetics
/ Rice
/ Science
/ Seeds
