GhUBX controlling helical growth results in production of stronger cotton fiber
Yihao Zang,
Yan Hu,
Chenyu Xu,
Shenjie Wu,
Yangkun Wang,
Zhiyuan Ning,
Zegang Han,
Zhanfeng Si,
Weijuan Shen,
Yayao Zhang,
Lei Fang,
TianZhen Zhang
Affiliations
Yihao Zang
State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China; Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China
Yan Hu
Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China
Chenyu Xu
State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China; Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China
Shenjie Wu
Biotechnology Research Center, Shanxi Academy of Agricultural Sciences, Taiyuan 030031, China
Yangkun Wang
State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
Zhiyuan Ning
State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
Zegang Han
State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
Zhanfeng Si
Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China
Weijuan Shen
State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
Yayao Zhang
Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China
Lei Fang
Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China
TianZhen Zhang
State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China; Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China; Corresponding author
Summary: Cotton fiber is an excellent model for studying plant cell elongation and cell wall biogenesis as well because they are highly polarized and use conserved polarized diffuse growth mechanism. Fiber strength is an important trait among cotton fiber qualities due to ongoing changes in spinning technology. However, the molecular mechanism of fiber strength forming is obscure. Through map-based cloning, we identified the fiber strength gene GhUBX. Increasing its expression, the fiber strength of the transgenic cotton was significantly enhanced compared to the receptor W0 and the helices number of the transgenic fiber was remarkably increased. Additionally, we proved that GhUBX regulates the fiber helical growth by degrading the GhSPL1 via the ubiquitin 26S–proteasome pathway. Taken together, we revealed the internal relationship between fiber helices and fiber stronger. It will be useful for improving the fiber quality in cotton breeding and illustrating the molecular mechanism for plant twisted growth.
