Molecular evidence that most RNAs required for germination and pollen tube growth are stored in the mature pollen grain in petunia
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概要
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After landing on the stigma, the pollen grain germinates and elongates a tube to deliver its generative nuclei to the egg cell of the ovule. The molecular mechanisms involved in the drastic morphological changes in the pollen grain during this fertilization process remain largely unknown. In this study, the expression of 732 randomly selected genes in petunia pollen and pollen tubes was analyzed by microarray and quantitative PCR analyses. We found no evidence for up-regulation of any of these genes in the pollen tube. Our findings provide support at the gene level for the longstanding hypothesis that pollen germination and tube growth are not dependent on new RNA synthesis and that the large number of RNAs required for germination and tube growth are stored in mature pollen grains.
著者
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KODAMA Hiroaki
Department of Chemistry, Faculty of Science and Engineering, Saga University
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Ando Toshio
Department of Physics, Kanazawa University
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WATANABE Masao
Graduate School of Life Sciences, Tohoku University
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Ishimizu Takeshi
Graduate School Of Science Osaka University
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Ando Toshio
Department Of Mathematics And Physics Grad School Of Natural Science And Technology Kanazawa Univ.
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Kodama Hiroaki
Department Of Bioproduction Science Faculty Of Horticulture Chiba University
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Kodama Hiroaki
Department Of Anatomy Ohu University School Of Dentistry
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