The Difference in Sterility due to High Temperatures during the Flowering Period among Japonica-Rice Varieties

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The objectives of this study are to compare the floret sterility induced by a high temperature given in the daytime during the flowering period among nine japonica rice varieties, and to clarify the mechanism of the high-temperature-induced sterility. Nine japonica rice varieties were subjected to 35.0, 37.5 or 40.0℃ day-temperature conditions (1000-1600) for six consecutive days using sun-lit phytotrons, and the percentage of fertility, pollination and germinated pollen grains on the stigmas were examined. The temperature that caused 50% sterility varied with the variety, and a difference of approximately 3.0℃ was observed between the most tolerant and susceptible varieties. Under the 37.5℃ day-temperature condition, the percentage of florets with 10 or more germinated pollen grains was roughly coincident with the percent fertility, but under the 40℃ day-temperature condition, it was higher than the percent fertility. Many of the florets with less than 10 germinated pollen grains had less than 20 total pollen grains on their stigmas under both temperature conditios. From these results, we concluded that sure pollination under high-temperature conditions is an important factor and that the high-temperature tolerance of the processes following pollen germination is also required fertility under excessively high temperature conditions.

収録刊行物

  • Plant production science

    Plant production science 4(2), 90-93, 2001-06-01

    日本作物学会

参考文献:  17件中 1-17件 を表示

被引用文献:  10件中 1-10件 を表示

各種コード

  • NII論文ID(NAID)
    110001720734
  • NII書誌ID(NCID)
    AA11162156
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    1343943X
  • データ提供元
    CJP書誌  CJP引用  NII-ELS 
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