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铈对UV-B胁迫下大豆幼苗光合原初反应的影响

Keywords: ,UV-B辐射,大豆幼苗,光合作用,原初反应

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Abstract:

用水培法研究了Ce(Ⅲ)对紫外辐射(UV-B,280~320nm)胁迫下大豆幼苗光合原初反应的影响。结果表明,20mg·L-1CeCl3能有效减缓紫外辐射(T1/3.34kJ·m-2和T2/11.76kJ·m-2)胁迫所导致的叶绿素与类胡萝卜素含量减少、光能转换效率(Fv/Fm)及传递能力(Fv/F0)降低,且对低剂量胁迫的调控效果优于高剂量,即以上指标Ce+T1>T1,Ce+T2>T2,Ce+T1>Ce+T2。从光合原初反应的能量分配看,Ce(Ⅲ)能促使大豆叶片吸收光能的总量增加,加快内囊体膜上光电的转换和电子的传递,降低UV-B辐射伤害而导致的过剩激发能积累,从而消除过剩激发能诱发的膜脂过氧化对光合器官的潜在威胁。

References

[1]  梁婵娟.曾庆玲.沈东兴.黄晓华.周青 稀土对UV-B辐射伤害植物的影响(Ⅰ)--Ce对UV-B辐射胁迫下油菜幼苗生长的影响 [J].-农业环境科学学报2004(1)
[2]  梁婵娟.黄晓华.周青 Ce对UV-B辐射胁迫下大豆幼苗光合作用影响:Ⅱ对光合量子效率与羧化效率的影响 [J].-农业环境科学学报2006(3)
[3]  Allen D J,Nogs S,Baker N R,Ozone depletion and increase UV-B radiation:is there a real threat to photosynthosis?,Journal of Experimental Botany,1998(328).
[4]  Jansen M A K,Gaba V,Greenberg B M,Higher plants and UV-B radiation:balancing damage,repair and acclimation,Trends in Plant Science,1998(4).
[5]  朱广廉,钟诲文,张爱琴,植物生理学实验指导书,北京:北京大学出版社,1990.
[6]  苏行,胡迪琴,林植芳,广州市大气污染对两种绿化植物叶绿素荧光特性的影响,植物生态学报,2002(5).
[7]  Demming-Adams B,Adams W W,Using chlorophyll fluorescence to assess the fraction of absorbed light allocated to thermal dissipation of excess excitation,Physiologia Plantarum,1996.
[8]  Sharma P K,Anand P,Sankhalkar S,Photochemical and biochemical changes in wheat seedlings exposed to supplementary UV-B radiation,Plant Science,1998.
[9]  Correia C M,Torres-Pereira M S,Torres-Pereira J M G,Growth,photosynthesis and UV-B absorbing compounds of Portuguese Barbela wheat exposed to ultraviolet-B radiation,Environmental Pollution,1999.
[10]  Hong F S,Wang L,Meng X X,The effect of cerium(Ⅲ) on the chlorophyll formation in spinach,Biological Trace Element Research,2002.
[11]  Hermans C,Smeyers M,Rodriguez R M,Quality assessment of urban trees:A comparative study of physiological characterization,airborne imaging and on site of fluorescence monitoring by the OJIP-test,Journal of Plant Physiology,2003.
[12]  姜闯道.高辉远.邹琦.蒋高明 田间大豆叶片成长过程中的光合特性及光破坏防御机制 [J].-植物生理与分子生物学学报2004(4)

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