4种含笑叶片叶绿素荧光参数Fv/Fm特性的比较  

Comparison of chlorophyll fluorescence Fv/Fm characteristics of four michelia trees

作　　者：陈辰[1] 何小定[1] 秦金舟[1] 刘桂华[1] 

机构地区：[1]安徽农业大学林学与园林学院,合肥230036

出　　处：《安徽农业大学学报》2013年第1期32-37,共6页Journal of Anhui Agricultural University

基　　金：国家"十二五"科技支撑项目(2011BAD38B0702)资助

摘　　要：对深山含笑、阔瓣含笑、金叶含笑和峨眉含笑幼树叶绿素荧光参数Fv/Fm在不同季节的日变化及其与光照(PAR)、气温(Ta)和大气相对湿度(RH)的相关性进行了测定和分析。结果表明,4种含笑幼树叶绿素荧光参数Fv/Fm在春季日变化小,各个时刻的测定值均大于0.75,荧光参数Fv/Fm在春季与其PAR、Ta和RH均无显著相关性。4种含笑叶绿素荧光参数Fv/Fm在夏季的日变化均呈先降后升的趋势,最低值(<0.75)出现在12:00～14:00之间。深山含笑和阔瓣含笑叶绿素荧光参数Fv/Fm与夏季的Ta和RH均分别呈显著负相关和显著正相关,但金叶含笑夏季叶绿素荧光参数Fv/Fm与PAR和Ta呈显著负相关。从叶绿素荧光参数Fv/Fm的日变化趋势和测定值看,深山含笑、阔瓣含笑和金叶含笑的光合机构在夏季12:00～14:00均受到可逆性胁迫影响。峨眉含笑夏季叶绿素荧光参数Fv/Fm与Ta和RH分别呈极显著负相关和极显著正相关,且Fv/Fm的测定值在一天中各个时刻均低于0.75,表明其光合机构在夏季受到不可逆性胁迫影响。峨眉含笑叶片叶绿素荧光参数Fv/Fm在秋季日变化呈先降后升的趋势,最低值(0.72)出现在14:00,且与RH呈显著正相关,其它3种含笑的Fv/Fm在秋季的日变化小,各个时刻的测定值均在0.75以上,且与其PAR、Ta和RH无显著相关性。4种含笑叶绿素荧光参数Fv/Fm在冬季的日变化均呈先升后降的趋势,且均与Ta呈显著正相关。从叶绿素荧光参数Fv/Fm的日变化趋势和测定值看,4种含笑的光合机构在冬季只受到了可逆性胁迫影响。The diurnal changes of chlorophyll fluorescence parameter Fv/Fm of seedlings of Michelia maudiae, Michelia platypetala, Micheliafoveolata and Michelia wilsonii in different seasons and correlations be- tween Fv/Fm values and photosynthetically active radiation （PAR）, air temperature （Ta） and air humidity （RH） were studied in this paper. The diurnal change range of Fv/Fm of four michelia trees in spring was small and the values in a whole day were higher than 0.75. There was no significant correlation between the chlorophyll fluo- rescence parameter Fv/Fm of four michelia trees and PAR, Ta and RH in spring. The values of Fv/Fm in a wole day in summer showed a trend of descending first and then ascending and the lowest values （ 〈 0.75 ） appeared between 12：00 and 14：00. A negative relation was founded between Fv/Fm value of Michelia maudiae and Ta and RH, while a positive correlation between Fv/Fm value of Michelia platypetala and Ta and RH in summer; there was a significant negative correlation between Fv/Fm value of Michelia foveolata and PAR and Ta in summer. Based on the diurnal changes trend and the Fv/Fm value in a whole day, the effects of reversible stress on the photosynthetic tissues of Michelia maudiae, Michelia platypetala and Micheliafoveolata were founded in summer from 12：00 to 14：00. The significant negative correlation and positive correlation between the values of Fv/Fm of Michelia wilsonii and Ta and RH were also founded in summer, respectively. The values of Fv/Fm of Michelia wilsonii in a whole day in summer were below 0.75, indicating that there was irreversible stress effect on the pho- tosynthetic tissues of Michelia wilsonii in summer. The diurnal change of Fv/Fm of Michelia wilsonii in autumn presented a trend of descending first and then ascending, and the lowest value （0.72）was at 14：00, and there was a significant postive correlation between the value of Fv/Fm and RH. The diurnal changes of Fv/Fm of the other three michelia trees in autumn were small, and

关 键 词：含笑 叶绿素荧光 FV FM 相关性 气象因子 

分 类 号：S718.43[农业科学—林学]