Stability of Rice Pollination in the Field under Hot and Dry Conditions in the Riverina Region of New South Wales, Australia

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Even under extremely hot (40℃) conditions during anthesis, heat-induced floret sterility does not appear to be a serious issue for Australian rice growers. This contradicts previously reported temperature thresholds for floret sterility. To determine the factors associated with stable rice production under hot and dry conditions in the Riverina region of New South Wales (Australia), we examined rice (cv. 'Langi') pollination at different distances from the windward edge of a paddy field and its association with canopy microclimate. With an air temperature of 34.5℃ and a relative humidity of 20.7% during anthesis, poor pollination of florets occurred at the windward edge, but pollination remained stable farther from the edge. The temperature difference between the air and the panicles in the canopy reached as high as 6.8℃ under these conditions because of low humidity and strong transpirational cooling. Moreover, the length of the dehiscence at the base of the thecae during anthesis was long; this is a desirable trait for heat tolerance. The long basal dehiscence of the thecae of this cultivar and die lower panicle temperatures relative to the ambient temperature caused by high transpirational cooling appear to be the key factors responsible for stable pollination under the extremely high temperatures of the Riverina region.

収録刊行物

  • Plant production science

    Plant production science 10(1), 57-63, 2007-01-01

    日本作物学会

参考文献:  18件中 1-18件 を表示

被引用文献:  1件中 1-1件 を表示

各種コード

  • NII論文ID(NAID)
    110006197657
  • 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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