生物
蓖麻属
拟南芥
MYB公司
转录因子
遗传学
调节器
毛状体
植物
拟南芥
基因
位置克隆
细胞生物学
表型
突变体
作者
Yueying Liu,Xinyu Wang,Zongjian Li,Jing Tu,Yanan Lu,Xiaohang Hu,Qingzhu Zhang,Zhimin Zheng
出处
期刊:Plant Physiology
[Oxford University Press]
日期:2023-03-08
卷期号:192 (2): 1028-1045
标识
DOI:10.1093/plphys/kiad149
摘要
Abstract Castor (Ricinus communis L.) is a dicotyledonous oilseed crop that can have either spineless or spiny capsules. Spines are protuberant structures that differ from thorns or prickles. The developmental regulatory mechanisms governing spine formation in castor or other plants have remained largely unknown. Herein, using map-based cloning in 2 independent F2 populations, F2-LYY5/DL01 and F2-LYY9/DL01, we identified the RcMYB106 (myb domain protein 106) transcription factor as a key regulator of capsule spine development in castor. Haplotype analyses demonstrated that either a 4,353-bp deletion in the promoter or a single nucleotide polymorphism leading to a premature stop codon in the RcMYB106 gene could cause the spineless capsule phenotype in castor. Results of our experiments indicated that RcMYB106 might target the downstream gene RcWIN1 (WAX INDUCER1), which encodes an ethylene response factor known to be involved in trichome formation in Arabidopsis (Arabidopsis thaliana) to control capsule spine development in castor. This hypothesis, however, remains to be further tested. Nevertheless, our study reveals a potential molecular regulatory mechanism underlying the spine capsule trait in a nonmodel plant species.
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