Occurrence of the PsbS and LhcSR products in the green alga Ulva linza and their correlation with excitation pressure.
Occurrence of the PsbS and LhcSR products in the green alga Ulva linza and their correlation with excitation pressure.
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DOI：
10.1016/j.plaphy.2013.05.024
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发表时间：
2013-09
期刊：
影响因子：
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通讯作者：
Xiaowen Zhang;N. Ye;S. Mou;Dong Xu;Xiao Fan
中科院分区：
文献类型：
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作者：
Xiaowen Zhang;N. Ye;S. Mou;Dong Xu;Xiao Fan
为了避免光抑制，植物已经发展了多种光保护机制。植物的短期强光保护机制之一是非光化学猝灭（NPQ），它将吸收的光能作为热能耗散。在绿色植物Ulvalinza中，NPQ的动力学开始于初始的快速上升，随后下降，然后在较长的时间段内第二次和更高的上升。在整个过程中，NPQ受ΔpH的触发和控制，并受到玉米黄质的强化和调节。捕光复合物（LHC）家族成员在这一机制中起着至关重要的作用。PSBS蛋白是LHC家族的成员，被认为只存在于高等植物中，首次在U. linza中被鉴定。在强光条件下，PSBS和LHCSR的表达均上调，且LHCSR的上调幅度大于PSBS。LHCSR和PSBS依赖的NPQ都可能是适应环境的重要策略，它们无疑在它们的进化中发挥了作用。
To avoid photoinhibition, plants have developed diverse photoprotection mechanisms. One of the short-term high light protection mechanisms in plants is non-photochemical quenching (NPQ), which dissipates the absorbed light energy as thermal energy. In the green alga,Ulvalinza, the kinetics of NPQ starts with an initial, quick rise followed by a decline, and then a second and higher rise at longer time periods. During the whole phase, NPQ is triggered and controlled by ΔpH, then strengthened and modulated by zeaxanthin. Light-harvesting complex (LHC) family members are known to play crucial roles in this mechanism. The PSBS protein, a member of the LHC family that was thought to be present exclusively in higher plants, has been identified for the first time inU. linza. The expression of both PSBS and LHCSR was up-regulated during high light conditions, and LHCSR increased more than PSBS. Both LHCSR and PSBS-dependent NPQ may be important strategies for adapting to the environment, and they have undoubtedly played a role in their evolution.