Is each light-harvesting complex protein important for plant fitness?1[w]
Is each light-harvesting complex protein important for plant fitness?1[w]
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DOI：
10.1104/pp.103.033324
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发表时间：
2004-01-01
期刊：
影响因子：
7.4
通讯作者：
Jansson, S
中科院分区：
文献类型：
--
作者：
Ganeteg, U;Külheim, C;Jansson, S
许多光合作用基因在所有高等植物中是保守的，这表明存在强大的选择压力来维持每个蛋白质的基因。然而，这些基因的突变体往往缺乏可见的生长表型，这表明它们只在某些条件下是重要的或具有重叠的功能。为了评估编码捕光复合体（LHC）蛋白的特定基因对植物在自然环境中生存的重要性，我们结合了两种不同的科学传统，通过对一组具有不同LHC蛋白含量的转基因拟南芥植物进行生态适应性测定。所有LHC缺陷植物的适应性在一些生长环境中降低，支持每个基因都被保守的假设，因为它们提供了生态灵活性，这在自然界中遇到的高度可变的条件下具有很大的适应价值。
Many of the photosynthetic genes are conserved among all higher plants, indicating that there is strong selective pressure to maintain the genes of each protein. However, mutants of these genes often lack visible growth phenotypes, suggesting that they are important only under certain conditions or have overlapping functions. To assess the importance of specific genes encoding the light-harvesting complex (LHC) proteins for the survival of the plant in the natural environment, we have combined two different scientific traditions by using an ecological fitness assay on a set of genetically modified Arabidopsis plants with differing LHC protein contents. The fitness of all of the LHC-deficient plants was reduced in some of the growth environments, supporting the hypothesis that each of the genes has been conserved because they provide ecological flexibility, which is of great adaptive value given the highly variable conditions encountered in nature.