Mutation in the gene encoding 1-aminocyclopropane-1-carboxylate synthase 4 (CitACS4) led to andromonoecy in watermelon

文献类型: 外文期刊

第一作者: Ji, Gaojie

作者: Ji, Gaojie;Zhang, Jie;Zhang, Haiying;Sun, Honghe;Gong, Guoyi;Shi, Jianting;Tian, Shouwei;Guo, Shaogui;Ren, Yi;Xu, Yong;Ji, Gaojie;Shen, Huolin;Gao, Junping

作者机构:

关键词: 1-aminocyclopropane-1-carboxylic acid synthase;Citrullus lanatus;sex determination

期刊名称:JOURNAL OF INTEGRATIVE PLANT BIOLOGY ( 影响因子:7.061; 五年影响因子:6.002 )

ISSN: 1672-9072

年卷期: 2016 年 58 卷 9 期

页码:

收录情况: SCI

摘要: Although it has been reported previously that ethylene plays a critical role in sex determination in cucurbit species, how the andromonoecy that carries both the male and hermaphroditic flowers is determined in watermelon is still unknown. Here we showed that the watermelon gene 1-aminocyclopropane-1-carboxylate synthase 4 (CitACS4), expressed specifically in carpel primordia, determines the andromonoecy in watermelon. Among four single nucleotide polymorphism (SNPs) and one InDel identified in the coding region of CitACS4, the C364W mutation located in the conserved box 6 was co-segregated with andromonoecy. Enzymatic analyses showed that the C364W mutation caused a reduced activity in CitACS4. We believe that the reduced CitACS4 activity may hamper the programmed cell death in stamen primordia, leading to the formation of hermaphroditic flowers.

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