The protective function of the xanthophyll cycle in photosynthesis
The protective function of the xanthophyll cycle in photosynthesis
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叶黄素循环在光合作用中的保护功能
DOI：
10.1016/0014-5793(94)01028-5
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发表时间：
1994
期刊：
影响因子：
3.5
通讯作者：
M. Havaux
中科院分区：
文献类型：
--
作者：
J. Sarry;J. Montillet;Y. Sauvaire;M. Havaux
在23°C下，暴露于2000 μE·M−2·S− 1的强白色光下的马铃薯叶片中，类胡萝卜素紫黄质通过花药黄质（叶黄素循环）快速转化为玉米黄质，这与光合电子传递的轻微抑制（根据叶绿素荧光测量估计）和低脂质过氧化（根据乙烷测量估计）有关。当叶黄素循环被二硫苏糖醇（3 mM）或低温（3°C）阻断时，电子传递的光抑制加剧，同时发生明显的脂质过氧化。在23°C（900 μE·m−2·s− 1）的非光抑制光处理下，马铃薯叶片中玉米黄质和花药黄质的积累显著降低了随后在3°C光胁迫下的脂质过氧化水平。所提出的结果表明，叶黄素循环的功能之一可能是保护类囊体膜免受脂质过氧化，这表明在强光下合成的玉米黄质和花药黄质是作为游离色素存在于膜脂双层中。
The rapid conversion of the carotenoid violaxanthin to zeaxanthin via antheraxanthin (xanthophyll cycle) in potato leaves exposed at 23°C to a strong white light of 2000 μE·M−2·S−1was associated with a slight inhibition of photosynthetic electron transport (as estimated from chlorophyll fluorescence measurements) and a low lipid peroxidation (as estimated from ethane measurements). When the xanthophyll cycle was blocked by dithiothreitol (3 mM) or low temperature (3°C), photoinhibition of electron transport was exacerbated and pronounced lipid peroxidation occurred concomitantly. Accumulation of zeaxanthin and antheraxanthin in potato leaves by a non-photoinhibitory light treatment at 23°C (900 μE·m−2·s−1for 1 h) considerably reduced the level of lipid peroxidation during subsequent light stress at 3°C. The presented results indicate that one of the functions of the xanthophyll cycle could be the protection of thylakoid membranes against lipid peroxidation, suggesting that zeaxanthin and antheraxanthin synthesized in strong light are present as free pigments in the membrane lipid bilayer.
DOI：
10.1016/0005-2736(91)90061-c
发表时间：
1991-09-10
期刊：
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子：
--
作者：
SUBCZYNSKI, WK;MARKOWSKA, E;SIELEWIESIUK, J
通讯作者：
SIELEWIESIUK, J
DOI：
10.1016/0005-2736(92)90167-k
发表时间：
1992-03-23
期刊：
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子：
--
作者：
SUBCZYNSKI, WK;MARKOWSKA, E;SIELEWIESIUK, J
通讯作者：
SIELEWIESIUK, J