Division of Plant Industry, CSIRO, GPO Box 1600, 2601, Canberra, ACT, Australia.
Photosynth Res. 1984 Jun;5(2):105-15. doi: 10.1007/BF00028524.
The effect of light intensity (16 h white light and 8 h dark) during growth of pea plants at 20°C on the chlorophyll composition and on the relative distribution of chlorophyll amongst the various chlorophyll-protein of pea thylakoids was studied. The chl a/chl b ratios increased from 2.1 to 3.2 as light intensity during growth varied from 10 to 840 μEm(-2) s(-1). This function can be described by two straight lines intersecting at a transition point of approximately 200 μEm(-2) s(-1). Similar discontinuities in the responses were observed in the changes in the relative distribution of chlorophyll amongst the various chlorophyll-protein complexes. This demonstrates that the chl a/chl b ratio of the various thylakoids is a good indicator of changes in the relative distribution of chlorophyll. As the chl a/chl b ratio decreased, the amount of chlorophyll associated with photosystem I complexes decreased, that with photosystem II core reaction centre complex was halved, and that with the main chl a/b-proteins of the light-harvesting complex was markedly increased.
在 20°C 下，研究了豌豆植株生长过程中光照强度（16 小时白光和 8 小时黑暗）对叶绿素组成以及各种豌豆类囊体叶绿素蛋白中叶绿素相对分布的影响。随着生长过程中光照强度从 10 到 840 μEm(-2) s(-1) 的变化，chl a/chl b 比值从 2.1 增加到 3.2。该功能可以用两条相交于大约 200 μEm(-2) s(-1) 的直线来描述。在各种叶绿素蛋白复合物中叶绿素相对分布的变化中也观察到了类似的不连续性。这表明各种类囊体的 chl a/chl b 比值是叶绿素相对分布变化的良好指标。随着 chl a/chl b 比值的降低，与光系统 I 复合物结合的叶绿素量减少，与光系统 II 核心反应中心复合物结合的叶绿素量减半，而与光捕获复合物的主要 chl a/b-蛋白结合的叶绿素量明显增加。
