armandii obviously presented a descending-ascending trend,the lowest value was at 12:00 and the NPQ(non-photochemical quenching) of sunny needle leaves arrived at the maximum at noon.
②华山松阴生叶的各项荧光参数日变化幅度均较小,阴生叶的最大荧光(Fm)、可变荧光(Fv)、Fv/Fm、电子传递效率(Fm/F0)及PSⅡ潜在活性(Fv/F0)均明显高于阳生叶,但阴生叶的NPQ明显低于阳生叶,尤其是幼叶。
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