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首页> 外文会议>NATO Advanced Research Workshop on The Chloroplast: From Molecular Biology to Biotechnology Kolymbari-Chania, Crete, Greece 10-15 August 1998 >Influence of a CO_2-Partial Pressure of 700 PPM on the Lipid and Fatty Acid Composition of Higher Plants
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Influence of a CO_2-Partial Pressure of 700 PPM on the Lipid and Fatty Acid Composition of Higher Plants

机译：700 PPM的CO_2分压对高等植物脂质和脂肪酸组成的影响

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摘要

The CO_2 content of the atmosphere is steadily increasing. It is generally assumed that the CO_2-content of air will increase within the next 50 years from now 350 ppm to 700 ppm. In context with this expected atmospheric change it is of interest to know what impact the CO_2-increase will have on growth of higher plants. With Nicotiana tabacum and the Chinese "Tung Oil Tree" Aleurites montana we were able to show that under the influence of the increased CO_2-content 30-40percent more biomass is formed. Differences in dependence on the CO_2-content are observed for the chlorophyll and sugar content on the one hand but also with respect to the content of the biomass forming enzyme ribulose 1.5-bisphosphate carboxylase and the energy equivalent-forming coupling factor of photophosphorylation CF_1. Molecular changes are observed in the composition of peptides of photosystem II and photosystem I. Thus, the light-harvesting complex of photosystem II (3,4) is reduced and the same is true for photosystem I. The oxygen-evolving-complex (OEC)-peptides are reduced in plants cultivated under increased CO_2. In addition the electron transport components (plastoquinone, cytochrome f, plastocyanin, ferredoxin, ferredoxin-NADP-reductase) are reduced under these conditions as shown by rocket-immune-electrophoresis.
机译：大气中的CO_2含量正在稳定增加。通常认为，在未来50年内，空气中的CO_2含量将从现在的350 ppm增加到700 ppm。在预期的大气变化的背景下，了解CO_2的增加将对高等植物的生长产生什么影响是很重要的。通过使用烟草和中国“桐油树”蒙牛油，我们能够证明，在增加的CO_2含量的影响下，可形成30-40％的生物量。一方面观察到叶绿素和糖含量对CO_2含量的依赖性差异，但也观察到生物质形成酶核糖1.5-双磷酸羧化酶的含量以及光磷酸化CF_1的能量当量形成偶联因子。在光系统II和光系统I的肽组成中观察到分子变化。因此，光系统II（3,4）的光收集复合物减少了，光系统I的情况也是如此。放氧复合物（OEC）在增加的CO_2下培养的植物中）-肽减少。另外，如火箭免疫电泳所示，在这些条件下电子传递成分（质体醌，细胞色素f，质体蓝蛋白，铁氧还蛋白，铁氧还蛋白-NADP-还原酶）降低。

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