Seasonal variations of leaf chlorophyll-protein complexes in the wintergreen herbaceous plant Ajuga reptans L.
Seasonal variations of leaf chlorophyll-protein complexes in the wintergreen herbaceous plant Ajuga reptans L.
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冬绿草本植物 Ajuga reptans L. 叶片叶绿素-蛋白质复合物的季节变化。
DOI：
10.1071/fp17199
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
T. Golovko
中科院分区：
文献类型：
--
作者：
O. Dymova;M. Khristin;Z. Miszalski;A. Kornaś;K. Strzałka;T. Golovko
研究了多年生草本冬青植物羊蹄草（Ajuga reptans L., bugle）不同季节叶片、叶绿体和分离色素蛋白复合物的叶绿素和类胡萝卜素含量、低温荧光光谱。在冬季，这些植物下调光合作用和PSA重组，包括叶绿素的损失，PSII功能反应中心的数量可能减少，以及类囊体蛋白复合物聚集的变化。在积雪覆盖的叶片中，我们还观察到PSI-PSII巨复合体和psii -光收集复合体II超复合体的重组。融雪后，还检测了与PSII相关的chl a/b色素蛋白复合物（LHCII）和游离色素的单体形式。我们预计积雪为保持光合作用机制在春季融雪后的光合作用提供了有利条件。在冬季，玉米黄质依赖的保护机制的作用可能会增强，该机制负责消耗过量吸收的光能。
The chlorophyll and carotenoid content, and the spectra of low-temperature fluorescence of the leaves, chloroplasts and isolated pigment-protein complexes in the perennial herbaceous wintergreen plant Ajuga reptans L. (bugle) in different seasons of the year were studied. During winter, these plants downregulate photosynthesis and the PSA is reorganised, including the loss of chlorophyll, possible reductions in the number of functional reaction centres of PSII, and changes in aggregation of the thylakoid protein complexes. We also observed a restructuring of the PSI-PSII megacomplex and the PSII-light-harvesting complex II supercomplex in leaves covered by snow. After snowmelt, the monomeric form of the chl a/b pigment-protein complex associated with PSII (LHCII) and the free pigments were also detected. We expect that snow cover provides favourable conditions for keeping photosynthetic machinery ready for photosynthesis in spring just after snowmelt. During winter, the role of the zeaxanthin-dependent protective mechanism, which is responsible for the dissipation of excess absorbed light energy, is likely to increase.