短期UV-B辐射对青藏高原美丽风毛菊PSⅡ光化学效率的影响

来源 :应用生态学报 | 被引量 : 44次 | 上传用户：gedebao

【摘要】

：

通过短期增补UV-B辐射模拟试验,研究了青藏高原典型天气(晴天、多云、阴天)下高山植物美丽风毛菊叶片的叶绿素荧光参数变化.结果表明:随天气由晴变阴,美丽风毛菊叶片暗适应3min的PSⅡ最大光化学量子效率(Fv/Fm)显著升高,实际PSⅡ光化学效率(ΦPSⅡ)和光化学猝灭系数(qP)也升高,而非光化学猝灭系数(NPQ)则降低,可见光辐射(PAR)是影响PSⅡ光能转化效率的主要因素.增补UV-B辐射后

【作者】

：

师生波尚艳霞朱鹏锦杨莉

【出处】

：

应用生态学报

【发表日期】

：

2011年05期

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短期UV-B辐射对青藏高原美丽风毛菊PSⅡ光化学效率的影响

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