论文部分内容阅读
目的研究模拟微重力对植物幼苗光合特性的影响。方法采用 1π回转器模拟微重力并处理植物样品 1 2 0h。结果 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/Fo外 ,Fv/Fo ,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。结论微重力对叶绿体的正常光合功能没有显著影响 ,故植物幼苗在微重力条件下可以正常生长。
Objective To study the effects of simulated microgravity on the photosynthetic characteristics of plant seedlings. Methods A 1π gyrator was used to simulate microgravity and to treat plant samples for 120 h. Results 1) Plant height and number of leaves increased; 2) Strawberry chlorophyll content decreased by 47.5% and carnation chlorophyll content increased by 4.3%; 3) After the rotation, the main absorption peak of chlorophyll of the two seedlings did not change, The FVC / Fm, Fv / Fm and T1 / 2 were all increased except for CA / Fo after rotation; 5) The chlorophyll content of the control and treated chloroplasts There are differences in the excitation energy distribution between the two light systems. Conclusion Microgravity has no significant effect on photosynthetic function of chloroplast, so plant seedlings can grow normally under microgravity.