Nitrogen partitioning in the photosynthetic apparatus of Plantago asiatica leaves grown under different temperature and light conditions:: Similarities and differences between temperature and light acclimation
Nitrogen partitioning in the photosynthetic apparatus of Plantago asiatica leaves grown under different temperature and light conditions:: Similarities and differences between temperature and light acclimation
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DOI：
10.1093/pcp/pci137
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发表时间：
2005-08-01
影响因子：
4.9
通讯作者：
Hikosaka, K
中科院分区：
文献类型：
--
作者：
Hikosaka, K
研究了生长温度和光照对氮素在光合组分间分配的影响。在不同温度和光照条件下栽培车前。生长条件的调节，使叶绿素a/B的比例在低温低辐射下生长的叶片是类似的，在高温高辐射下生长的叶片，这表明在光合机构中的光能的获取和利用之间的平衡是相似的两种生长条件。当对叶片氮含量作图时，RuBP（核酮糖-1，5-二磷酸）羧化酶含量没有显着差异，这取决于生长条件。高光照和低温都降低了氮分配到叶绿素-蛋白质复合物。低温增加氮分配到基质FBPase（果糖-1，6-磷酸酶）不受生长光照。气体交换测定表明，电子传递速率（J（max））与最大羧化速率（V-cmax）的比值不受生长光照的影响，而受生长温度的影响。得出的结论是，氮分配之间的获取和利用的光能响应生长温度和光照，而羧化和再生RuBP之间的氮分配只响应生长温度。
Effects of growth temperature and irradiance on nitrogen partitioning among photosynthetic components were studied. Plantago asiatica was grown under different temperature and light conditions. Growth conditions were regulated such that the Chl a/b ratio in leaves grown at a low temperature with a low irradiance was similar to that in leaves grown at a high temperature with a high irradiance, suggesting that the balance between acquisition and utilization of light energy in the photosynthetic apparatus was similar between the two growth conditions. When plotted against the leaf nitrogen content, the RuBP (ribulose-1,5-bisphosphate) carboxylase content did not significantly differ depending on growth conditions. Both high irradiance and low temperature decreased nitrogen partitioning to Chl-protein complexes. Low temperature increased nitrogen allocation to stroma FBPase (fructose-1,6-phosphatase) irrespective of growth irradiance. Gas exchange measurement indicated that the ratio of the electron transport (J(max)) to the maximum carboxylation rate (V-cmax) was not affected by growth irradiance but by growth temperature. It is concluded that nitrogen partitioning between acquisition and utilization of light energy responds to both growth temperature and irradiance, while nitrogen partitioning between carboxylation and regeneration of RuBP responds only to growth temperature.