摘要
以沈农265水稻为试材,自然光为对照,研究了2种增强紫外辐射处理下(分别增加5%和10%),水稻不同生育时期光合色素含量和叶绿素荧光动力学参数的变化特征。研究结果显示,两处理下的叶绿素含量在拔节期减少最多,叶绿素a分别下降13.87%和23.30%,叶绿素b分别下降10.76%和17.70%;而类胡萝卜素含量均有所增加,其中抽穗期增幅最大,分别比对照增加了21.55%和31.02%。2种处理下的PSⅡ原初光能转换效率(Fv/Fm)在灌浆期下降最多,分别比对照下降了4.4%和7.83%;PSⅡ潜在活性(Fv/Fo)也比对照降低了9.02%和17.03%;实际量子产量(ΦPSⅡ)在抽穗期降幅较大,但处理间差异不显著(P<0.05);2种处理下的光化学荧光淬灭系数(qP)均有所降低,且降幅随生育进程逐渐减小;2种处理下的非光化学荧光淬灭(NPQ)在各生育时期的变化截然相反,分别比对照升高和降低。
It was used to investigate the contents of photosynthetic pigment and the characteristics of chlorophyll fluorescence kinetics parameters in the different growth stages of rice（ Shennong 265） at different treatments（ UV radiation intensity increased by 5% and 10% respectively）,compared with natural lighting. Results showed that the contents of chlorophyll-a and chlorophyll-b were diminished significantly in the jointing stage. The content of chlorophyll-a was diminished by 13. 87% and 23. 30% respectively. The content of chlorophyll-b was diminished by 10. 76% and 17. 70% respectively. The contents of carotenoids were increased by 21. 55% and 31. 02% respectively,especially in the heading stage. The intrinsic photochemical efficiency（ Fv/ Fm） of two treatments was diminished by 4. 4% and 7. 83% respectively in the filling stage,and the potential activities（ Fv/ Fo） were diminished by 9. 02% and 17. 03% respectively. Decreasing amplitude of effective quantum yield（ ΦPSⅡ） in the heading stage was higher than other stages,but there had no significant difference between treatments（ P 〈0. 05）. Photochemical quenching（ qP） reduced significantly in the two treatments,and the influence was waning with growth process. Nonphotochemical quenching（ NPQ） of T1 increased significantly,yet NPQ of T2 reduced significantly.
出处
《华北农学报》
CSCD
北大核心
2014年第2期146-151,共6页
Acta Agriculturae Boreali-Sinica
基金
辽宁省教育厅重点实验室项目(LS2010146)
关键词
水稻
UV-B
叶绿素
荧光参数
Rice
UV-B
Chlorophyll
Fluorescence parameters
