Winter acclimation of PsbS and related proteins in the evergreen Arctostaphylos uva-ursi as influenced by altitude and light environment.
Winter acclimation of PsbS and related proteins in the evergreen Arctostaphylos uva-ursi as influenced by altitude and light environment.
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DOI：
10.1111/j.1365-3040.2005.01466.x
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发表时间：
2006-05
期刊：
影响因子：
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通讯作者：
C. Zarter;W. W. Adams-W.;V. Ebbert;I. Adamska;S. Jansson;B. Demmig-Adams
中科院分区：
文献类型：
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作者：
C. Zarter;W. W. Adams-W.;V. Ebbert;I. Adamska;S. Jansson;B. Demmig-Adams
万年青地被植物熊果（Arctostaphylos uva-ursi [L.] Sprengel）的特点是连续两年（2002-2004年），从阳光照射和阴影的网站在山地黄松和亚高山森林群落的1900和2800米高的海拔，分别。在夏季，光合能力和黎明前的光系统II（PSII）的效率在所有四个群体都同样高，在冬季，只有阳光照射和阴影的人口在2800米表现出完全下调的光合放氧能力和持续下调的PSII效率。这种光合下调在高海拔涉及的PSII组件[脱镁叶绿素，D1蛋白，氧释放复合物（[OEC]的大幅减少，一个强大的上调几个抗早光诱导蛋白（Elip）-和抗高光诱导蛋白（Hlip）-反应带和玉米黄质和花药黄质（Z + A）的温暖持续保留。PsbS，蛋白质调制的快速参与和脱离的Z +A的能量耗散，表现出其最明显的冬季增加在阴凉处在1900米，因此显然承担了更大的作用，在冬季提供快速可逆的玉米黄质依赖的光保护时，光变得过度的阴影人口，这仍然是光合作用活跃。这是有吸引力的假设，PsbS的亲戚（Elips/Hlips）可能参与持续玉米黄质依赖的光保护在更极端的冬季条件下，在2800米。
The evergreen groundcover bearberry (Arctostaphylos uva-ursi [L.] Sprengel) was characterized over two successive years (2002-2004) from both sun-exposed and shaded sites at a montane ponderosa pine and subalpine forest community of 1900- and 2800-m-high altitudes, respectively. During summer, photosynthetic capacities and pre-dawn photosystem II (PSII) efficiency were similarly high in all four populations, and in winter, only the sun-exposed and shaded populations at 2800 m exhibited complete down-regulation of photosynthetic oxygen evolution capacity and consistent sustained down-regulation of PSII efficiency. This photosynthetic down-regulation at high altitude involved a substantial decrease in PSII components [pheophytin, D1 protein, oxygen evolving complex ([OEC)], a strong up-regulation of several anti-early-light-inducible protein (Elip)- and anti-high-light-inducible protein (Hlip)-reactive bands and a warm-sustained retention of zeaxanthin and antheraxanthin (Z + A). PsbS, the protein modulating the rapid engagement and disengagement of Z +A in energy dissipation, exhibited its most pronounced winter increases in the shade at 1900 m, and thus apparently assumes a greater role in providing rapidly reversible zeaxanthin-dependent photoprotection during winter when light becomes excessive in the shaded population, which remains photosynthetically active. It is attractive to hypothesize that PsbS relatives (Elips/Hlips) may be involved in sustained zeaxanthin-dependent photoprotection under the more extreme winter conditions at 2800 m.