A Cucumber DELLA Homolog CsGAIP May Inhibit Staminate Development through Transcriptional Repression of B Class Floral Homeotic Genes

作者：Zhang Yan; Liu Bin; Yang Sen; An Jingbo; Chen Chunhua; Zhang Xiaolan^*; Ren Huazhong

来源：PLos One, 2014, 9(3): e91804.

DOI：10.1371/journal.pone.0091804

• Cidadania feminina
• Violência contra a mulher
• Pacto Nacional pelo Enfrentamento à Violência Contra a Mulher
• Plano Estadual de Políticas para Mulheres
• Estrutura de enfrentamento à violência contra a mulher

In hermaphroditic Arabidopsis, the phytohormone gibberellin (GA) stimulates stamen development by opposing the DELLA repression of B and C classes of floral homeotic genes. GA can promote male flower formation in cucumber (Cucumis sativus L.), a typical monoecious vegetable with unisexual flowers, and the molecular mechanism remains unknown. Here we characterized a DELLA homolog CsGAIP in cucumber, and we found that CsGAIP is highly expressed in stem and male flower buds. In situ hybridization showed that CsGAIP is greatly enriched in the stamen primordia, especially during the hermaphrodite stage of flower development. Further, CsGAIP protein is located in nucleus. CsGAIP can partially rescue the plant height, stamen development and fertility phenotypes of Arabidopsis rga-24/gai-t6 mutant, and ectopic expression of CsGAIP in wide-type Arabidopsis results in reduced number of stamens and decreased transcription of B class floral homeotic genes APETALA3 (AP3) and PISTILLATA (PI). Our data suggest that monoecious CsGAIP may inhibit staminate development through transcriptional repression of B class floral homeotic genes in Arabidopsis.

• 出版日期2014-3-14
• 单位中国农业大学