利用高光谱遥感监测紫外辐射对亚热带树木的影响  

Spectral Reflectance Response of Plant Leaf to Simulated UVB Stress

作　　者：蒋鹤鸣[1] 江洪[1,2] 周国模[1] 洪霞[1] 谢小赞[1] 黄梅玲[2] 

机构地区：[1]浙江农林大学,亚热带森林培育国家重点实验室／浙江省森林生态系统碳循环与固碳减排重点实验室,浙江杭州311300 [2]南京大学国际地球系统科学研究所,江苏南京210093

出　　处：《光谱学与光谱分析》2012年第2期453-458,共6页Spectroscopy and Spectral Analysis

基　　金：科技部重大国际合作项目(200073819);科技部重大基础性项目(2007FY110300-08);国家重点基础研究发展规划项目(2005CB422207,2005CB422208,2010CB428503);国家高技术研究发展计划项目(2009AA122001,2009AA122005);国家自然科学基金项目(40671132);浙江省重大科技专项项目(2008C13G2100010)资助

摘　　要：研究了中国亚热带地区常见的三种常绿阔叶树种在不同强度的UVB(L-UVB,CK和UVB)作用下,其叶片的叶绿素相对含量及可见光部分的光谱反射率的变化特征。实验结果显示:不同受试树种对UVB敏感不同,叶绿素含量因树种不同变化很大,同一树种在叶绿素含量上过滤UVB处理显著高于加强UVB处理;在可见光部分的光谱反射率,加强UVB的处理则普遍高于L-UVB的处理;树种间对不同胁迫程度的适应存在差异。在不同强度UVB作用后,各树种叶片在可见光部分的光谱反射率的差异主要集中在绿光及红光。本文的研究结果表明亚热带常绿阔叶树种对UVB具有较强的敏感性,不同树种对UVB处理的反应不同。In the present study,we evaluate the relative content of chlorophyll and spectral reflectance variations in the visible light under different intensity of UVB（L-UVB,CK and UVB） of three typical evergreen broadleaf plants in China subtropical area.In different simulated UVB condition,the experiment shows that different tree species have different UVB sensitivity,and chlorophyll content varies greatly with species,and the chlorophyll relative content with the filter UVB was significantly higher than with enhanced UVB.In the spectral reflectance of the visible part,it is generally higher with enhanced UVB＇s treatment than with L-UVB treatment;and any treatments present adaptation,species under different stress.After roles of the different UVB intensity,for each tree species the visible part of the spectral reflectance shows difference between green and red mainly.The study results show that the subtropical evergreen broad-leaved species has a strong sensitivity to the UVB,and UVB response of different tree species varies greatly.

关 键 词：UVB 叶绿素 光谱反射率 常绿阔叶树种 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]