增补UV-B辐射对高山植物美丽风毛菊叶片PSⅡ光化学效率的影响
Effect of Enhanced UV-B Radiation on PSⅡPhotochemistry Efficiency in Alpine PlantsSaussurea superba
查看参考文献21篇
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文摘
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太阳紫外线-B(UV-B)辐射增强作为全球环境变化的一个方面,也是影响青藏高原植物生存的主要环境因子之一。以美丽风毛菊(Saussurea superba)为材料,分析增补UV-B辐射期间叶片PSⅡ运行效率(ФPSⅡ)、光化学和非光化学猝灭系数(qP和NPQ),及光合色素和UV-B吸收物质含量的变化,探讨高山植物的UV-B驯化适应过程。结果表明:增补UV-B辐射能抑制暗适应3 min后PSⅡ光化学量子效率F(v)/F(m)的恢复过程;尽管增补前期ФPSⅡ有升高趋势,但第7 d以后ФPSⅡ呈下降趋势,说明UV-B辐射对光合机构具有负影响,F(v)/F(m)的降低以及ФPSⅡ的变化反映了UV-B辐射效应的积累;qP与ФPSⅡ的变化趋势相同,NPQ在第9 d略有降低趋势,叶厚度的相对增加弥补了光合色素的光氧化损失并增强了对激发能的利用。增补UV-B处理对UV-B吸收物质含量的影响不明显,说明叶表皮层内丰富的黄酮类物质能有效保护光合机构,受UV-B辐射波动的影响较少。综上表明,高山植物美丽风毛菊对增补UV-B辐射有一个驯化适应过程,尽管单位叶面积光合色素的增加有益于光合速率的提高,但UV-B辐射增强对光合生理过程仍具有潜在的负效应。 |
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其他语种文摘
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Strong solar UV-B radiation as one factor of global change is a main environmental factor on al-pine plants in Qinghai-Tibet region.Based on previous UV-B-supplementation report on alpine plant Saus-surea superba,the dynamic changes of PSⅡoperating efficiency,ФPSⅡ,and photochemical and non-photo-chemical quenching,qPandNPQ,were analyzed during periods of enhancement of UV-B radiation.Re-sults indicated that 3 mins dark adapted quantum efficiency of PSⅡphotochemistry,F(v)/F(m),was de-creased when compared with the UV-A control.PSⅡoperating efficiency,ФPSⅡ,showed an increased trend during the first 7 days of enhanced UV-B radiation treatment then decreased after continuously treat-ment.This suggested that an accumulation of UV-B radiation damage could reduce PSⅡphotochemistry efficiency.There were similar changes inqPandФPSⅡ,butNPQhas a decreasing trend at 9 days.This may result from increased photosynthetic pigments due to thicking leaves that absorb and utilize more ener-gy.There was no influence on UV-B-absorbing compounds after enhancing UV-B radiation that suggested flavonoids compounds can provide enough protection on photosynthetic function from UV-B damage.In summary,although photosynthetic pigments enhanced photosynthesis,negative effects still existed especially at the end of plant development. |
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来源
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草地学报
,2011,19(4):539-545 【扩展库】
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关键词
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美丽风毛菊
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PSⅡ光化学效率
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青藏高原
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光合色素
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UV-B辐射
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地址
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中国科学院西北高原生物研究所, 中国科学院高原生物适应与进化重点实验室, 西宁, 810001
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-0435 |
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学科
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植物学 |
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基金
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国家自然科学基金
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国家科技部国际合作重点项目
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文献收藏号
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CSCD:4273898
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参考文献 共
21
共2页
|
|
1.
周秀骥. 中国地区臭氧总量变化与青藏高原低值中心.
科学通报,1995,40(15):1396-1398
|
被引
151
次
|
|
|
|
|
2.
周秀骥. 青藏高原地区大气臭氧变化的研究.
气象学报,2004,62(5):513-527
|
被引
53
次
|
|
|
|
|
3.
Sicora C. UV-B and UV-A radiation effects on photosynthesis at the molecular level.
Environmental UV radiation:Impact on ecosystem and human health and predictive model,2006:121-135
|
被引
1
次
|
|
|
|
|
4.
van Rensen J J. Time sequence damage to the acceptor and donor sides of photosystemⅡby UV-B radiation as evaluated by chlorophyll a fluorescence.
Photosynthesis Research,2007,94:219-297
|
被引
3
次
|
|
|
|
|
5.
师生波. 增补UV-B辐射对高山植物美丽风毛菊光合作用和光合色素的影响.
草地学报,2010,18(5):607-614
|
被引
6
次
|
|
|
|
|
6.
师生波. 滤除自然光中UV-B辐射成分对高山植物美丽风毛菊光合生理的影响.
植物生态学报,2011,35(2):176-186
|
被引
6
次
|
|
|
|
|
7.
Flint S D. Ecosystem UV-B experiments in terrestrial communities:a review of recent findings and methodologies.
Agricultural and Forest Meteorology,2003,120(3):177-189
|
被引
23
次
|
|
|
|
|
8.
Bjorn L O. Simulation of daylight ultraviolet radiation and effects of ozone depiction.
Environmental UV photobiology,1993:41-71
|
被引
4
次
|
|
|
|
|
9.
Genty B. The relationship between the quantum yield of photosynthetic electron transport and quenching of chlorophyll fluorescence.
Biochimica et Biophysica Acta,1989,990(1):87-92
|
被引
834
次
|
|
|
|
|
10.
Bilger W. Role of the xanthophyll cycle protoprotection elucidated by measurements of light-induced absorbance changes,fluorescence and photosynthesis in leaves of Hedera canariensis.
Photosynthesis Research,1990,25:173-185
|
被引
195
次
|
|
|
|
|
11.
师生波. 不同海拔地区紫外线B辐射状况及植物叶片紫外线吸收物质含量的分析.
植物生态学报,1999,23(6):529-535
|
被引
45
次
|
|
|
|
|
12.
朱广廉.
植物生理学实验,1990:51-54
|
被引
190
次
|
|
|
|
|
13.
Allen D J. Ozone depletion and increased UV-B radiation:is there a real threat to photosynthesis?.
Journal Experimental Botany,1998,49:1775-1788
|
被引
40
次
|
|
|
|
|
14.
Sprtová M. Photosynthetic UV-B response of beach(Fagus sylvaticaL.)saplings.
Photosynthetica,2003,41(4):533-543
|
被引
2
次
|
|
|
|
|
15.
Baker N R. Chlorophyll fluorescence:a probe of photosynthesis in vivo.
Annual Review of Plant Biology,2008,59:89-113
|
被引
283
次
|
|
|
|
|
16.
Baker N R. Chlorophyll fluorescence as a probe of photosynthetic productivity.
Chlorophyll a fluorescence:A signature of photosynthesis,2004:65-82
|
被引
2
次
|
|
|
|
|
17.
Lizana X C. Crop phenology modifies wheat responses to increased UV-B radiation.
Agricultural and Forest Meteorology,2009,149(11):1964-1974
|
被引
13
次
|
|
|
|
|
18.
Jansen M A K. Higher plants and UV-B radiation:balancing damage,repair and acclimation.
Trends in Plant science,1998,3(4):131-135
|
被引
45
次
|
|
|
|
|
19.
Fedina I. Effect of pretreatment of barley seedlings with different salts on the level of UV-B induced and UV-B absorbing compounds.
Environmental and Experimental Botany,2006,56(3):225-230
|
被引
11
次
|
|
|
|
|
20.
Lau T S L. Ambient levels of UV-B in Hawaii combined with nutrient deficiency decrease photosynthesis in near-isogenic maize lines varying in leaf flavonoids:Flavonoids decrease photoinhibition in plants exposed to UV-B.
Photosynthetica,2006,44(3):394-403
|
被引
9
次
|
|
|
|
|
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