Gain-of-function of the 1-aminocyclopropane-1-carboxylate synthase gene ACS1G induces female flower development in cucumber gynoecy
文献类型: 外文期刊
作者: Zhang, Huimin 1 ; Li, Shuai 1 ; Yang, Li 2 ; Cai, Guanghua 2 ; Chen, Huiming 5 ; Gao, Dongli 2 ; Lin, Tao 2 ; Cui, Qingzhi 5 ; Wang, Donghui 6 ; Li, Zheng 7 ; Cai, Run 8 ; Bai, Shunong 6 ; Lucas, William J. 2 ; Huang, Sanwen 2 ; Zhang, Zhonghua 1 ; Sun, Jinjing 1 ;
作者机构: 1.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Sino Dutch Joint Lab Hort Genom, Minist Agr,Key Lab Biol & Genet Improvement Hort, Beijing 100081, Peoples R China
2.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Genome Anal Lab, Minist Agr, Shenzhen 518124, Peoples R China
3.Huazhong Agr Univ, Coll Hort & Forestry, Wuhan 430070, Peoples R China
4.Minist Educ, Key Lab Hort Plant Biol, Wuhan 430070, Peoples R China
5.Hunan Acad Agr Sci, Hunan Vegetable Res Inst, Changsha 410125, Peoples R China
6.Peking Univ, Coll Life Sci, Beijing 100871, Peoples R China
7.Northwest A&F Univ, Coll Hort, Xian 712100, Shaanxi, Peoples R China
8.Shanghai Jiao Tong Univ, Sch Agr & Biol, Shanghai 200240, Peoples R China
9.Univ Calif Davis, Coll Biol Sci, Davis, CA 95616 USA
10.Qingdao Agr Univ, Coll Hort, Qingdao 266109, Peoples R China
期刊名称:PLANT CELL ( 影响因子:11.277; 五年影响因子:12.061 )
ISSN: 1040-4651
年卷期: 2021 年 33 卷 2 期
页码:
收录情况: SCI
摘要: Unisexual flowers provide a useful system for studying plant sex determination. In cucumber (Cucumis sativus L.), three major Mendelian loci control unisexual flower development, Female (F), androecious [a; 1-aminocyclopropane-1-carboxylate {ACC} synthase 11, acs11], and Monoecious (M; ACS2), referred to here as the Female, Androecious, Monoecious (FAM) model, in combination with two genes, gynoecious (g, the WIP family C2H2 zinc finger transcription factor gene WIP1) and the ethylene biosynthetic gene ACC oxidase 2 (ACO2). The F locus, conferring gynoecy and the potential for increasing fruit yield, is defined by a 30.2-kb tandem duplication containing three genes. However, the gene that determines the Female phenotype, and its mechanism, remains unknown. Here, we created a set of mutants and revealed that ACS1G is responsible for gynoecy conferred by the F locus. The duplication resulted in ACS1G acquiring a new promoter and expression pattern; in plants carrying the F locus duplication, ACS1G is expressed early in floral bud development, where it functions with ACO2 to generate an ethylene burst. The resulting ethylene represses WIP1 and activates ACS2 to initiate gynoecy. This early ACS1G expression bypasses the need for ACS11 to produce ethylene, thereby establishing a dominant pathway for female floral development. Based on these findings, we propose a model for how these ethylene biosynthesis genes cooperate to control unisexual flower development in cucumber.
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