Premium
Natural variations of growth thermo‐responsiveness determined by SAUR 26/27/28 proteins in Arabidopsis thaliana
Author(s) -
Wang Zhixue,
Yang Leiyun,
Liu Zhenhua,
Lu Minghui,
Wang Minghui,
Sun Qi,
Lan Yiheng,
Shi Tieliu,
Wu Dianxing,
Hua Jian
Publication year - 2019
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.15956
Subject(s) - subfamily , biology , arabidopsis , arabidopsis thaliana , gene , adaptation (eye) , genetic architecture , locus (genetics) , gene expression , rosette (schizont appearance) , genetic variation , genetics , evolutionary biology , phenotype , mutant , neuroscience , immunology
Summary How diversity in growth thermo‐responsiveness is generated for local adaptation is a long‐standing biological question. We investigated molecular genetic basis of natural variations in thermo‐responsiveness of plant architecture in Arabidopsis thaliana . We measured the extent of rosette architecture at 22°C and 28°C in a set of 69 natural accessions and determined their thermo‐responsiveness of plant architecture. A genome‐wide association study was performed to identify major loci for variations in thermo‐responsiveness. The SAUR 26 subfamily, a new subfamily of SAUR genes, was identified as a major locus for the thermo‐responsive architecture variations. The expression of SAUR 26/27/28 is modulated by temperature and PIF 4. Extensive natural polymorphisms in these genes affect their RNA expression levels and protein activities and influence the thermo‐responsiveness of plant architecture. In addition, the SAUR 26 subfamily genes exhibit a high variation frequency and their variations are associated with the local temperature climate. This study reveals that the SAUR 26 subfamily is a key variation for thermo‐responsive architecture and suggests a preference for generating diversity for local adaptation through signaling connectors.