Role of Ubisch bodies secreted by tapetum in Ca2+ transprot |
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Authors: | Xianghong Meng Jianbo Wang Rongqian Li |
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Institution: | (1) College of Life Sciences, Wuhan University, 430072 Wuhan, China |
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Abstract: | The distribution of Ca2+ in the anthers of wheat was observed using cytochemical method of potassium antimonite. At the later tetrad stage, Ubisch
bodies carrying Ca2+ were observed on the inner surface of tapetum, in anther locule and on pollen surface. The Ubisch bodies contacted with pollen,
and Ca2+ began to accumulate on pollen surface. At the uninucleate pollen stage, abundant Ubisch bodies were distributed in anther
locule, and the amount of Ca2+ on pollen surface increased. At the mature pollen stage a large amount of Ca2+ ions were localized on the inner surface of tapetum, the surface of pollen and Ubisch bodies. In the pollen wall, Ca2+ precipitates arranged in radial lines. These results demonstrated that Ubisch bodies were involved in Ca2+ transport from anther wall to pollen surface at some developmental stages of anther. |
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Keywords: | wheat anther Ubisch bodies pollen Ca2+ |
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