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叶片照远红光后，其叶绿素荧先参数Fm／Fo和两个光系统低温荧光产量比值F685／F735升高，照红先后，其Fm／Fo和F685／F735降低；在照远红光或红先过程中，与F685／F735的变化相比，Fm／Fo的变化幅度在较短的时间内达到最大；NaF预处理的叶片经远红光照射时，其Fm／Fo和F685／F735不增加；DCMU预处理的叶片经红光照射时，其Fm／Fo和F685／F735降低的幅度比对照小。这些结果表明，小麦叶片状态转换过程中两个先系统间能量分配的变化至少部分地与激发能满溢变化有关。这种满溢的变化与捕光色素蛋白复合体LHCⅡ的磷酸化相联，并且，与光吸收截面变化相比，满溢的变化是对两个光系统不平衡光吸收的较快响应。
Fv / Fo and F685 / F735 ratio of chlorophyll fluorescence parameter Fm / Fo and low-temperature fluorescence of the two photosystems increased after the leaves were exposed to far-red light. Their photosynthetic Fm / Fo and F685 / F735 decreased afterwards. In the process of red first, compared with the change of F685 / F735, the change range of Fm / Fo reaches the maximum in a short period of time. When the leaf of NaF pretreated by far red light, the Fm / Fo and F685 / F735 are not Increased. The decrease of Fm / Fo and F685 / F735 in DCMU pretreated leaves was less than that of control when exposed to red light. These results indicate that the change of energy distribution between two pre-systems during the state transition of wheat leaves is at least partly related to the change of excitation energy. This overflowing change is linked to the phosphorylation of the light harvesting protein complex LHCII, and, as compared to changes in light absorption cross sections, the change in overflow is a faster response to unbalanced light absorption of the two light systems.