Natural variations of SLG1 confer high-temperature tolerance in indica rice

With global warming and climate change, breeding crop plants tolerant to high-temperature stress is of immense significance. tRNA 2-thiolation is a highly conserved form of tRNA modification among living organisms. Here, we report the identification of SLG1 ( Slender Guy 1 ), which encodes the cytos...

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Bibliographic Details
Published in:Nature communications 2020-10, Vol.11 (1), p.5441-5441, Article 5441
Main Authors: Xu, Yufang, Zhang, Li, Ou, Shujun, Wang, Ruci, Wang, Yueming, Chu, Chengcai, Yao, Shanguo
Format: Article
Language:English
Subjects:
631/208/8
631/449/2661/2663
631/61/447/8
82/1
82/111
82/29
82/58
Climate change
Cultivation
Global warming
Grain cultivation
Heat resistance
High temperature
Humanities and Social Sciences
multidisciplinary
Phenotypes
Plant breeding
Proteins
Rice
Science
Science (multidisciplinary)
Seedlings
Temperature tolerance
tRNA
tRNA Ala
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Summary:With global warming and climate change, breeding crop plants tolerant to high-temperature stress is of immense significance. tRNA 2-thiolation is a highly conserved form of tRNA modification among living organisms. Here, we report the identification of SLG1 ( Slender Guy 1 ), which encodes the cytosolic tRNA 2-thiolation protein 2 (RCTU2) in rice. SLG1 plays a key role in the response of rice plants to high-temperature stress at both seedling and reproductive stages. Dysfunction of SLG1 results in plants with thermosensitive phenotype, while overexpression of SLG1 enhances the tolerance of plants to high temperature. SLG1 is differentiated between the two Asian cultivated rice subspecies, indica and japonica , and the variations at both promoter and coding regions lead to an increased level of thiolated tRNA and enhanced thermotolerance of indica rice varieties. Our results demonstrate that the allelic differentiation of SLG1 confers indica rice to high-temperature tolerance, and tRNA thiolation pathway might be a potential target in the next generation rice breeding for the warming globe. Understanding the mechanism of high-temperature tolerance will help to breed crops adaptive to warming climate. Here, the authors show SLG1 , a cytosolic tRNA 2-thiolation protein 2 encoding gene, is differentiated between the two Asian cultivated rice subspecies and confers high temperature tolerance of indica rice.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-020-19320-9