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Abnormalities in pistil development result in low seed set in Leymus chinensis (Poaceae) |
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| Authors: | Nianjun Teng Tong Chen Biao Jin Xiaoqin Wu Zehao Huang Xiaoguan Li Yuhua Wang Xijin Mu Jinxing Lin |
| Institution: | aKey Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China bGraduate School of the Chinese Academy of Sciences, Beijing 100049, China cDepartment of Horticulture, Agricultural College, Yangzhou University, Yangzhou 225009, China |
| Abstract: | Megasporogenesis and megagametogenesis in Leymus chinensis and the callose deposition during these developmental processes were investigated. In addition, morphological and histochemical studies of pistils at anthesis and pollen behavior on the stigmas after pollination were examined. The results indicate that embryo sac development and callose deposition pattern of this grass follow the archetypal Polygonum type. Nearly half of the pistils developed abnormally in megagametogenesis, while only 8.6% of abnormalities occurred in megasporogenesis. Over 47% of pistils at anthesis were abnormal in appearance. By 24 h after anthesis, many pollen grains had germinated on the stigmas of normal pistils. The high percentage of abnormal pistils and their low capacity to capture pollen grains may be the main factor in the low seed set of L. chinensis. |
| Keywords: | Callose deposition Embryo sac development Leymus chinensis Low seed set Pistil development |
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