Photosynthetic performances of transplanted Cypripedium flavum plants
Photosynthetic performances of transplanted Cypripedium flavum plants
复制标题
DOI：
10.7016/bbas.200510.0307
复制
发表时间：
2005-10
期刊：
影响因子：
--
通讯作者：
Shi-Bao Zhang;Hong Hu;Zhekun Zhou;Kun Xu;N. Yan;Shuyun Li
中科院分区：
文献类型：
--
作者：
Shi-Bao Zhang;Hong Hu;Zhekun Zhou;Kun Xu;N. Yan;Shuyun Li
为探索低海拔地区黄花菜的保护与栽培，对喜马拉雅山东部高山黄花菜光合特性的变化进行了研究。从天生桥（alt. 3,450米），并种植在中甸（alt. 3，200米）和昆明（海拔3，200米）。1 900米）。在天生桥和中甸的黄花菜叶片表现出较高的光合速率、气孔导度、蒸腾速率、表观量子效率和羧化效率。光合作用的最适温度为20 ℃。生长在天生桥、中甸和昆明的黄花草的温度分别为18、19和2 ℃。最适温度也随光合有效辐射（PAR）的增加而增加。而C.三个地点的flavum对PAR的影响相似。光合作用在PAR为746-832 μ mol·m ~（-2）·s ~（-1）时达到光饱和。C的无能。在较低海拔（昆明），黄毛忍冬适应高温，光合速率下降。结果表明，C.在低海拔地区，黄藓对温暖的温度适应性较差。它可以在较低的海拔高度种植，但需要制定适当的农艺学方法以促进生长。
To explore the conservation and cultivation of Cypripedium flavum at comparatively lower altitudes, a study on variations in photosynthetic characteristics was conducted on C flavum plants from the high mountains of the eastern Himalayas. Plants of same size (6 leaves, 35-40 cm height) were selected from Tianshengqiao (alt. 3,450 m) and planted at the gardens at Zhongdian (alt. 3,200 m) and Kunming (alt. 1,900 m). The leaves of C flavum at Tianshengqiao and Zhongdian exhibited higher photosynthetic rate, stomatal conductance, transpiration rate, apparent quantum yield, and carboxylation efficiency than their counterparts at Kunming. The optimal temperatures for photosynthesis of C. flavum plants growing at Tianshengqiao, Zhongdian, and Kunming were 18, 19 and 2 degrees C, respectively. The optimal temperature also increased with increasing photosynthetically active radiation (PAR). However, the photosynthetic responses of C. flavum to PAR were similar at the three sites. The photosynthesis reached light saturation at the PAR of 746-832 mu mol m(-2)s(-1). The inability of C. flavum to acclimate to higher temperature resulted in the depression of photosynthetic rate at the lower altitude (Kunming). The results suggest that C. flavum adapts poorly to the warmer temperatures at low altitudes. It can be cultivated at a lower attitude, but proper agronomical methodology will need to be developed for better growth.