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Position: Home > Articles > Defective callose walls and cell plates during abnormal meiosis cause male-sterility in the oat mutant zbs1 Journal of Integrative Agriculture 2016,15 (2)

Defective callose walls and cell plates during abnormal meiosis cause male-sterility in the oat mutant zbs1

作者：

Shi Xiao;Wu Jin-xia;Zhou Hai-tao;Yang Xiao-hong;Li Tian-liang;Zhang Xin-jun;Yang Cai;Han Xiao

单位：

Zhangjiakou Acad Agr Sci, Zhangjiakou 075000, Peoples R China;Chinese Acad Agr Sci, Biotechnol Res Inst, Natl Key Facil Gene Resources & Gene Improvement, Beijing 100081, Peoples R China

关键词：

callose;male sterility;meiosis;microspore;naked oat

摘要：

During meiosis in flowering plants, degradation of the callose wall in tetrads releases newly produced microspores, which develop into mature pollen grains. In this study, we identified zbs1, a male-sterile mutant of naked oat (Avena nuda L.) that displayed complete spikelet sterility due to inviable mature pollen. The abnormal pollen grains originated from microspores with a defective callose wall and cell plate during meiosis. The defective callose wall and cell plate of the zbs1 mutant were detected by the labeling of cell wall epitopes (beta-1,3-glucan) with immunogold during meiosis, and an abnormal chromosome configuration was observed by propidium iodide staining. The mature pollen grains of the zbs1 mutant were irregular in shape, and abnormal germination was observed by scanning electron microscopy. Together, our results indicate that the cause of male sterility in zbs1 is abnormal meiosis.

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Defective callose walls and cell plates during abnormal meiosis cause male-sterility in the oat mutant zbs1

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