摘要
与正常重力下生长的植物幼苗对照相比 ,在竖直平面内经回转器连续做 12 0h圆周回转的草莓和香石竹幼苗的生长状况发生如下变化 :(1)株高和叶片数有所增加 ;(2 )草莓的叶绿素含量降低 47.5 % ,香石竹叶绿素含量增加 4.3% ;(3)回转后两种幼苗的叶绿素的主要吸收峰位不变 ,而每个峰位吸收强度有所增加 ;(4 )两种幼苗的叶片快速荧光动力学参数 ,回转后除CA/F0 外 ,Fv/F0 、Fv/Fm 和T1/ 2 均有提高 ;(5 )对照和处理的叶绿体的两个光系统间的激发能分配有差异 。
When the seedlings of strawberry and carnation were cultured while rotating around a horizontal axis on a clinostat, their photosynthetic characteristics were different from the control:(1) there were some increases in height and number of leaves per plant (Table 1); (2) the content of chlorophyll in strawberry declined by 47.5% and that in carnation increased by 4.3%(Fig.1); (3) there was no change in position of the main absorption peaks, but the intensity of them was increased;(4) there were significant increases in the parameters of chlorophyll fluorescence inductive kinetics except CA/F 0 (complementary areas of fluorescence rise)(Fig.2); (5) there were some differences in excitation energy distribution between the two photosystems, but no function of chloroplasts was impaired(Fig.3).
基金
国家863资助项目!(8632.7.2 .13)
关键词
微重力
光合特征
叶绿素
幼苗生长
植物
microgravity, photosynthetic characteristic, strawberry, carnation
