Physiologie végétale, 3 place de l'université, CH 1211, Geneve 4.
Photosynth Res. 1985 Jan;7(1):41-57. doi: 10.1007/BF00032921.
In order to evaluate the aclimation of Chenopodium seedlings to different quantum fluence rates of R and BL, kinetics of Rubisco capacity, Chl content and chloroplast structure were studied. Under monochromatic light photoreceptors are stimulated selectively and their influence on biosynthetis capacities during chloroplast development can be studied.R irradiations saturate Rubisco capacity even at the lowest quantum fluence rates applied, whereas Chl a+b synthesis depends strongly upon fluence rate of R. Under BL irradiations, both Rubisco capacity and Chl content are fluence rate dependent. R irradiations favour Chl b synthesis relative to Chl a, whereas under BL Chl a content is high relative to Chl b. Under R irradiation Pfr is the main photoreceptor involved in regulation of Rubisco capacity whereas under BL a specific BL absorbing photoreceptor may control the response. From the fluence rate dependency under BL irradiations it is concluded that the blue region of the day light spectrum may be the sensor for monitoring fluence rate and causing the characteristic changes in shade and high/low WL adaptation with respect to Rubisco levels in Chenopodium.
为了评估 Chenopodium 幼苗对不同量子 R 和 BL 通量率的适应情况，研究了 Rubisco 容量、Chl 含量和叶绿体结构的动力学。在单色光下，光感受器被选择性地刺激，并且可以研究它们对叶绿体发育过程中生物合成能力的影响。R 辐射即使在应用的最低量子通量率下也能使 Rubisco 容量饱和，而 Chl a+b 的合成强烈依赖于 R 的通量率。在 BL 辐射下，Rubisco 容量和 Chl 含量都与通量率有关。R 辐射有利于 Chl b 的合成相对于 Chl a，而在 BL 下 Chl a 的含量相对于 Chl b 较高。在 R 辐射下，Pfr 是调节 Rubisco 容量的主要光感受器，而在 BL 下，可能有一种特定的 BL 吸收光感受器来控制这种反应。从 BL 辐射下的通量率依赖性可以得出结论，白天光谱的蓝光区域可能是监测通量率的传感器，并导致 Chenopodium 中 Rubisco 水平相对于遮荫和高光/低光适应的特征变化。
