THE UNSATURATION OF MEMBRANE-LIPIDS STABILIZES PHOTOSYNTHESIS AGAINST HEAT-STRESS
THE UNSATURATION OF MEMBRANE-LIPIDS STABILIZES PHOTOSYNTHESIS AGAINST HEAT-STRESS
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DOI：
10.1104/pp.104.2.563
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发表时间：
1994-02-01
期刊：
影响因子：
7.4
通讯作者：
MURATA, N
中科院分区：
文献类型：
--
作者：
GOMBOS, Z;WADA, H;MURATA, N
通过对蓝藻集胞藻6803的脂肪酸去饱和酶进行突变和转化，研究了类囊体膜甘油脂不饱和度对光合放氧耐热性的影响。实验结果表明，去除二烯类脂质分子后，光合放氧的耐热性降低，但幅度较小，而去除三烯类脂质分子对耐热性无影响。这一结论与以前的假设，即光合作用的耐热性增强后，在膜脂饱和度的增加。研究还表明，光照不影响脂类不饱和度对光合作用耐热性影响的性质。
The effect of the unsaturation of glycerolipids of thylakoid membranes on the heat tolerance of the photosynthetic evolution of oxygen was studied in vivo by mutation and transformation of fatty-acid desaturases in the cyanobacterium Synechocystis PCC6803. The experimental results indicate that elimination of dienoic lipid molecules decreases, to a small but distinct extent, the heat tolerance of photosynthetic oxygen evolution, but that elimination of trienoic lipid molecules has no effect on the heat tolerance. This conclusion contrasts with the previous hypothesis that the heat tolerance of photosynthesis is enhanced upon an increase in the level of saturation of membrane lipids. It is also shown that light does not affect the nature of the effect of lipid unsaturation on the heat tolerance of photosynthesis.