生物
水稻
突变体
MYB公司
农学
转录因子
禾本科
粮食产量
产量(工程)
磷酸盐
植物
基因
遗传学
生物化学
材料科学
冶金
作者
Tingting Wang,Y. Jin,Lele Deng,F. Li,Zhiyuan Wang,Yanxun Zhu,Yufeng Wu,Hongye Qu,Shunan Zhang,Ying Liu,Hanwei Mei,Lijun Luo,Yan Mao,Minghong Gu,Guohua Xu
标识
DOI:10.1093/plcell/koad268
摘要
The high-yielding Green Revolution varieties of cereal crops are characterized by a semi-dwarf architecture and lodging resistance. Plant height is tightly regulated by the availability of phosphate (Pi), yet the underlying mechanism remains obscure. Here, we report that rice (Oryza sativa) R2R3-type MYB transcription factor MYB110 is a Pi-dependent negative regulator of plant height. MYB110 is a direct target of PHOSPHATE STARVATION RESPONSE 2 (OsPHR2) and regulates OsPHR2-mediated inhibition of rice height. Inactivation of MYB110 increased culm diameter and bending resistance, leading to enhanced lodging resistance despite increased plant height. Strikingly, the grain yield of myb110 mutants was elevated under both high- and low-Pi regimes. Two divergent haplotypes based on single nucleotide polymorphisms in the putative promoter of MYB110 corresponded with its transcript levels and plant height in response to Pi availability. Thus, fine-tuning MYB110 expression may be a potent strategy for further increasing the yield of Green Revolution cereal crop varieties.
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