UV-B辐射胁迫对细叶青冈幼苗叶绿素荧光特性的影响  

UV-B radiative forcing on chlorophyll fluorescence characteristics of Cyclobalanopsis gracilis seedlings

作　　者：余小龙 余树全 伊力塔 殷秀敏 张华柳 

机构地区：[1]亚热带森林培育国家重点实验室培育基地,浙江临安311300 [2]杭州之江园林绿化艺术有限公司,杭州310053

出　　处：《东北农业大学学报》2011年第10期114-119,共6页Journal of Northeast Agricultural University

基　　金：国家自然科学基金项目(30970485);浙江省科技厅重点科研项目(2006C12060);浙江林学院科研发展基金人才启动项目(2008FR100)

摘　　要：通过对在自然生境(CK)、辐射UV-B增强(+10%)和辐射UV-B减弱(-80%)三种条件下的细叶青冈幼苗叶绿素含量、荧光参数Fv/Fm、Fv/Fo和ΦPSII的测定研究,探讨UV-B辐射胁迫对细叶青冈生长的影响。结果表明,细叶青冈幼苗在辐射UV-B减弱胁迫下叶绿素含量、荧光参数Fv/Fm、Fv/Fo和ΦPSII均高于辐射增强胁迫组和对照组,表明细叶青冈幼苗在减弱UV-B辐射胁迫下具有较好的适应性,并能促进其生长;而辐射增强胁迫下细叶青冈幼苗的适应性较差。The paper studied chlorophyll content and chlorophyll fluorescence characteristics（Fv/ Fro, FvlFo and φpsllof Cyclobalanopsis gracilis under the different UV-B radiative forcing. Three intensities of radiative forcing were treated in this experiment： radiative forcing （CK）, ＋ 10% radiative forcing and -80% radiative forcing. To investigate UV-B radiation forcing effect on the growth of Cyclo- balanopsis graci/is. The results showed： under-80% radiative forcing treatment, chlorophyll content, fluorescence parameters FvlFm, FvlFo, and φpsll were higher than radiative forcing （CK） and ＋ 10% radiative forcing, The results indicated that Cyclobalanopsis gracilis had better adaptability under the lower radiative forcing, it can promote its growth; but it had poor adaptability under higher radiative forcing conditions.

关 键 词：UV—B辐射 叶绿素荧光 细叶青冈幼苗 

分 类 号：S718.5[农业科学—林学] Q945.78[生物学—植物学]