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紫外线B增强对滇杨、川杨光合参数及暗呼吸的影响 被引量:3

Effects of Enhanced UV-B Radiation on Photosynthetic Parameters and Dark Respiration of Populus yunnanensis and P. szechuanica
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摘要 在自然条件下利用紫外灯补充紫外线B,模拟臭氧层破坏10%、20%后昆明地区增加的紫外线B强度2.5和5 k J/(m^2·d),研究了紫外线B增加对滇杨(Populus yunnanensis)(2 430 m)和川杨(P.szechuanica)(3 300 m)光合参数、暗呼吸速率、叶片厚度的影响。结果表明:与对照相比,2.5和5 k J/(m^2·d)紫外线B处理使滇杨的净光合速率(Pn)分别降低了32%和51%,川杨则降低了16%和39%;相反,2.5和5 k J/(m^2·d)紫外线B显著提高了暗呼吸速率(Rd)和叶片厚度;相关性分析表明:两种杨树的叶片净光合速率与水分利用效率均呈显著正相关,与暗呼吸速率呈显著的负相关(P<0.01)。此外,2.5 k J/(m^2·d)紫外线B强度对滇杨和川杨的气孔导度、暗呼吸速率及其与净光合效率比值的影响不同;且川杨的净光合速率、暗呼吸速率、叶片厚度都显著大于滇杨,这些差异反映出生长在高海拔环境下的川杨比生长在低海拔的滇杨对紫外线B增强具有更强的耐性。 We compared the leaf photosynthetic parameters, dark respiration rate and leaf thickness of Populus yunnanensis and P. szechuanica originating from altitudes of 2 430 m and 3 300 m,respectively,when exposed to enhanced ultraviolet-B (UV-B) radiation: 2.5 and 5 kJ/(m^2·d). These enhanced UV-B intensity were provided by ultraviolet lamp based on simulation of 10% and 20% ozone depletion in Kunming area. Results showed that enhanced UV-B radiation significantly reduced Net photosynthetic rate (Pn) by 32% and 51% in P. yunnanensis, by 16% and 39% in P. szechuanica, respectively. In contrast, dark respiration rate (Rd) and leaf thickness of both species were significantly increased. Correlating analysis indicated that there were significantly positive correlation between Pn and WUE, and negative correlation between Pn and Rd (P〈0.01).On the other hand, 2.5 kJ/(m^2·d) UV-B treatments had different influences on stomatal conductance, Rd and Rd/Pn of both study species.Moreover, Pn,Rd and leaf thickness were significantly larger in P.szechuanica than in P.yunnanensis. Therefore,it could conclude that P.szechuanica from high altitude had a greater tolerance to enhanced UV-B environment than P.yunnanensis from low altitude.
出处 《云南农业大学学报(自然科学版)》 CSCD 北大核心 2016年第1期95-100,共6页 Journal of Yunnan Agricultural University:Natural Science
基金 国家自然科学基金项目(31260167)
关键词 紫外线B 净光合速率 暗呼吸速率 水分利用效率 UV-B radiation net photosynthetic rate dark respiration rate water use efficiency
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  • 1ANDERSON J G, TOOHEY D W, BRUNE W H. Free radicals within the Antarctic vortex: the role of CFCs in Antarctic ozone loss [J]. Science, 1991,251 (4989) : 39.
  • 2CASADEVALL R, RODRIGUEZ R E, DEBERNARDI J M, et al. Repression of growth regulating factors by the microRNA396 inhibits cell proliferation by UV-B radiation in Arabidopsis leaves [J]. The Plant Cell, 2013, 25 (9) : 3570.
  • 3HECTORS K, JACQUES E, PRINSEN E, et al. UV radiation reduces epidermal cell expansion in leaves of Arabidopsis thaliana [ J ]. Journal of Experimental Botany, 2010, 61 (15) : 4339.
  • 4QADERI M M, YEUNG E C, REID D M. Growth and physiological responses of an invasive alien species, Silene noctiflora, during two developmental stages to four levels of uhraviolet-B radiation [ J ]. Ecoscience, 2008, 15 (2): 150.
  • 5BASSMAN J H, EDWARDS G E, ROBBERECHT R. Photosynthesis and growth in seedlings of five forest tree species with contrasting leaf anatomy subjected to supplemental UV-B radiation [ J ]. Forest Science, 2003, 49 (2) : 176.
  • 6ZU Y G, PANG H H, YU J H, et al. Responses in the morphology, physiology and biochemistry of Taxus chinensis var. mairei grown under supplementary UV-B radiation [ J ]. Journal of Photochemistry and Photobiology B: Biology, 2010, 98 (2) : 152.
  • 7STRID A, CHOW W S, ANDERSON J M. Effects of supplementary ultraviolet-B radiation on photosynthesis in Pisum sativum [ J ]. Biochimica et Biophysica Acta, 1990, 1020: 260.
  • 8王美娟,刘春帅,李元,何永美,姬静.UV-B辐射和氮素互作对灯盏花生长和生理指标的影响[J].云南农业大学学报(自然科学版),2011,26(3):369-375. 被引量:5
  • 9韩超,申海玉,刘庆.云杉幼苗对气候变暖和 UV-B 辐射增强的光合响应( 英文)[J].西北植物学报,2014,34(4):820-827. 被引量:4
  • 10何承忠,车鹏燕,周修涛,段安安,王德新,辛培尧.滇杨基因资源及其研究概况[J].西南林学院学报,2010,30(1):83-88. 被引量:23

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