Hui Wenkai, Fan Jiangtao, Liu Xianzhi, Zhao Feiyan, Saba Tasheen, Wang Jingyan, Wu Aimin, Zhang Xuebin, Zhang Junli, Zhong Yu, Chen Gang, Gong Wei
Key Laboratory of Ecological Forestry Engineering of Sichuan Province, College of Forestry, Sichuan Agricultural University, Chengdu, China.
State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China.
Front Plant Sci. 2022 Sep 2;13:976338. doi: 10.3389/fpls.2022.976338. eCollection 2022.
is a prominent plant for food industries. Its male flowers often occur in gynogenesis plants; however, the potential mechanism remains poorly understood. Herein, a total of 26 floral sex differentiation stages were observed to select four vital phases to reveal key factors by using RNA-seq, phytohormones and carbohydrates investigation. The results showed that a selective abortion of stamen or pistil primordia could result in the floral sex differentiation in . Carbohydrates might collaborate with cytokinin to effect the male floral differentiation, whereas female floral differentiation was involved in SA, GA, and ABA biosynthesis and signal transduction pathways. Meanwhile, these endogenous regulators associated with reproductive growth might be integrated into ABCDE model to regulate the floral organ differentiation in . Furthermore, the 21 crucial candidates were identified in co-expression network, which would contribute to uncovering their roles in floral sex differentiation of in further studies. To the best of our knowledge, this study was the first comprehensive investigation to link floral sex differentiation with multi-level endogenous regulatory factors in . It also provided new insights to explore the regulatory mechanism of floral sex differentiation, which would be benefited to cultivate high-yield varieties in .
是食品工业中的一种重要植物。其雄花常出现在雌核发育植株中；然而，潜在机制仍知之甚少。在此，共观察到26个花性别分化阶段，通过RNA测序、植物激素和碳水化合物研究选择四个关键阶段以揭示关键因素。结果表明，雄蕊或雌蕊原基的选择性败育可导致其花性别分化。碳水化合物可能与细胞分裂素协同作用影响雄花分化，而雌花分化涉及水杨酸、赤霉素和脱落酸的生物合成及信号转导途径。同时，这些与生殖生长相关的内源调节因子可能整合到ABCDE模型中以调控其花器官分化。此外，在共表达网络中鉴定出21个关键候选基因，这将有助于在进一步研究中揭示它们在其花性别分化中的作用。据我们所知，本研究是首次将其花性别分化与多层次内源调节因子联系起来的全面研究。它还为探索花性别分化的调控机制提供了新见解，这将有利于培育其高产品种。
