应用生态学报2017，Vol.28Issue(4)：1077-1086,10.DOI:10.13287/j.1001-9332.201704.036
穿透雨减少下锐齿栎叶片光合色素季节动态及其反射光谱响应
Leaf photosynthetic pigment seasonal dynamic of Quercus aliena var.acuteserrata and its spectral reflectance response under throughfall elimination
摘要
Abstract
Our objective was to explore the mechanism of spectral reflectance response to leaf photo-synthetic pigment seasonal dynamic of Quercus aliena var.acuteserrata under throughfall elimination.We simulated rainfall decline through throughfall elimination (TFE) treatment in the experiment plots of Baotianman Natural Reserve in Henan,measured leaf pigment content and its spectral reflectance during growing season in both TFE and control plots.We analyzed seasonal changes of photosynthetic pigments and changes of pigments induced by TFE and their spectral reflectance responses.The results showed that all photosynthetic pigments content and pigment-ratios exhibited clear seasonal patterns.Leaf photosynthetic pigments content and ratio had differences between TFE plot and control plot during the whole growing season,and significant difference was found in chlorophyll b (Chl b) indicating that Chl b had higher sensitivity than other pigments.Carotenoids (Car) content showed minor difference compared with other pigments,indicating that Car had less sensitivity to TFE.The spectral reflectance of 550 nm was found to be the waveband most sensitive to seasonal changes of pigments,so we formulated the sample ratio index (SR750.550) based on it.The strong positive relationships between SR750,550 and Chl a,Chl b,Chl and Car contents were found with high significant level.Similarly,significant negative relationships were also been found between photochemical reflectance index (PRI) and Car/Chl.The spectral reflectance of 550 nm was most sensitive to changes of pigments induced by TFE.SR750,550 was sensitive to changes of leaf Chl a,Chl b and Chl content induced by TFE (P＜0.01),but not to change of Chl a/b.PRI was sensitive to change of leaf Car/Chl induced by TFE (P＜0.01).关键词
穿透雨排除/锐齿栎/水分/光合色素/反射光谱Key words
throughfall elimination/Quercus aliena var.acuteserrata/water/photosynthetic pigment/spectral reflectance引用本文复制引用
刘畅,孙鹏森,刘世荣,陆海波,陈志成,刘晓静..穿透雨减少下锐齿栎叶片光合色素季节动态及其反射光谱响应[J].应用生态学报,2017,28(4):1077-1086,10.基金项目
本文由国家自然科学基金项目(31290223)资助 This work was supported by the National Natural Science Foundation of China (31290223). （31290223）
