文献类型： 外文期刊

作者： Cai, Yaming ¹ ; Ma, Zhishen ⁴ ; Ogutu, Collins Otieno ¹ ; Zhao, Lei ¹ ; Liao, Liao ¹ ; Zheng, Beibei ¹ ; Zhang, Ruoxi; ¹ ;

作者机构： 1.Chinese Acad Sci, Innovat Acad Seed Design, Wuhan Bot Garden, CAS Key Lab Plant Germplasm Enhancement & Special, Wuhan, Peoples R China

2.Univ Chinese Acad Sci, Beijing, Peoples R China

3.Chinese Acad Sci, Core Bot Gardens, Ctr Econ Bot, Wuhan, Peoples R China

4.Hebei Acad Agr & Forestry Sci, Shijiazhuang Pomol Inst, Shijiazhuang, Hebei, Peoples R China

5.Chinese Acad Sci, Sino Africa Joint Res Ctr, Wuhan, Peoples R China

关键词： Prunus persica; tapetum degradation; pollen development; ROS homeostasis; male sterility

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：4.402； 五年影响因子：5.207 ）

ISSN： 1664-462X

年卷期： 2021 年 12 卷

页码：

收录情况： SCI

摘要： Male sterility is an important agronomic trait for hybrid vigor utilization and hybrid seed production, but its underlying mechanisms remain to be uncovered. Here, we investigated the mechanisms of male sterility in peach using a combined cytology, physiology, and molecular approach. Cytological features of male sterility include deformed microspores and tapetum cells along with absence of pollen grains. Microspores had smaller nucleus at the mononuclear stage and were compressed into belts and subsequently disappeared in the anther cavity, whereas tapetum cells were swollen and vacuolated, with a delayed degradation to flowering time. Male sterile anthers had an ROS burst and lower levels of major antioxidants, which may cause abnormal development of microspores and tapetum, leading to male sterility in peach. In addition, the male sterility appears to be cytoplasmic in peach, which could be due to sequence variation in the mitochondrial genome. Our results are helpful for further investigation of the genetic mechanisms underlying male sterility in peach.