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田间增加UV-B辐射对丝瓜光合作用日变化及水分利用效率的影响
  • 摘要

    在自然条件下,增加不同强度的UV-B辐射,对攀援植物丝瓜叶片光合速率日变化和水分利用效率进行了研究,发现经增加R1强度UV-B辐射处理的丝瓜的净光合速率和蒸腾速率比对照上升了28%和33%,水分利用效率则下降了3.4%,而经增加R2强度UV-B辐射处理的丝瓜的净光合速率和蒸腾速率比对照上升了47%和13%,水分利用效率也上升了28%,且其光合作用不受午间强光的抑制,光合午休现象消失了.这表明,在该实验的UV-B强度下,丝瓜的光合作用不但未受抑制,反而还增强了,说明适当增加UV-B辐射对丝瓜的生长有利.

  • 作者

    罗南书  刘芸  钟章成  周永洪  张彭跃 

  • 作者单位

    西南师范大学,生命科学学院,重庆,400715/西南农业大学,农学系,重庆,400716

  • 刊期

    2003年3期 ISTIC PKU

  • 关键词

    UV-B辐射  丝瓜  光合作用  水分利用效率 

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