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采用快速叶绿素荧光诱导方法研究了和田河上游两河交汇处自然分布的四种荒漠河岸植物光系统II(PSII)的能量分配特征,结果显示:灌木柽柳(Tamarix spp.)、黑果枸杞(Lycium ruthenicum)、铃铛刺(Halimodendron halodendron)以及多年生草本骆驼刺(Alhagi sparsifolia)四个种对当地河岸环境都适应较好,其PSII光化学传递效率有差异,以骆驼刺最高而柽柳最低。总效能指数PIt的四个组成成分中,主要光化学反应和电子传递受体QA到QB的传递效率对总体光化学效率的贡献率四个种都最高,PIt与Fv/Fm的变化在种之间具有不一致性。不同种之间生理..