光照强度对青冈栎容器苗生长和生理特征的影响  

Effects of Light Intensities on Growth and Physiological Characteristics of Potted Cyclobalanopsis glauca Seedlings

作　　者：陈秋夏[1] 廖亮 郑坚[1] 王金旺[1] 李效文[1] 夏海涛[1] 马履一[3] 

机构地区：[1]浙江省亚热带作物研究所,温州325005 [2]浙江省乐清市林业局,乐清325600 [3]北京林业大学林学院,北京100083

出　　处：《林业科学》2011年第12期53-59,共7页Scientia Silvae Sinicae

基　　金：国家"十一五"科技支撑计划(2006BAD24B01);浙江省温州市重大科技计划项目(N20090014)

摘　　要：研究不同光照强度(100%,60%,40%,20%,5%透光率)青冈栎容器苗形态和生理特征。结果表明:不同光照强度下,青冈栎容器苗地径、生物量、质量指数等参数差异达显著水平,其值由高到低分别为100%,60%,40%,20%,5%处理。随着透光率的增加,Chla/Chlb,Car/Chl、根质量比、比叶质量呈现上升趋势,色素(Chla,Chlb,Car)含量、比叶面积、叶质量比呈现下降趋势。遮荫明显增加青冈栎叶片电子传递的量子效率(ФPSII)和光化学猝灭系数(qP),全光照处理青冈栎叶片ФPSII只有0.131,而5%光强的处理中叶片ФPSII达到0.701,5%光强的处理中叶片qP为0.925,全光照下的处理中叶片qP为0.32。遮荫降低非光化学猝灭系数(NPQ),全光照处理青冈栎叶片非光化学猝灭系数NPQ为2.54,而5%透光率处理非光化学猝灭系数为0.16。随着透光率的提高,青冈栎叶片丙二醛(MDA)含量呈现下降趋势,游离脯氨酸含量(Pro)呈上升趋势。青冈栎为喜阳性树种,但也具有耐荫性。This experiment was conducted to examine the effects of light intensity on growth and physiological characteristics of potted Cyclobalanopsis glauca container seedlings.The results showed that the basal diameter,biomass,quality index of the seedlings varied significantly in different light regime,and these morphological parameters changed from high to low with an increase in light intensity from full sunlight to 5% of sunlight.Chla/Chlb,Car /Chl,root weight ratio were increased with increasing of light intensity,while the contents of Chla,Chlb and Car,specific leaf area,and leaf weight ratio were decreased.Quantum efficiency of electron transport（ФPSII） and photochemical quenching（qP） in leaves of C.glauca significantly decreased with light intensity,with mean values of ФPSII and qP values changed from 0.701 to 0.131 and from 0.925 to 0.238,respectively.Shading treatment also decreased non-photochemical quenching（NPQ）,with the mean values changing from 2.54 to 0.16 with the decrease in light intensity from full sunlight to 5% of sunlight.With an increase in light intensity,malondialdehyde（MDA） content of C.glauca was decreased,but free proline（Pro） content was increased.These results indicated that the C.glauca seedlings would have an excellent shade tolerance,though it is a photophilous tree species.

关 键 词：青冈栎 容器苗 光照强度 生理特征 

分 类 号：S723[农业科学—林木遗传育种] Q945[农业科学—林学]