应用生态学报2012，Vol.23Issue(12)：3338-3346,9.
UV-B辐射胁迫下杨梅幼苗的高光谱响应
High-spectral responses of Myrica rubra seedlings to UV-B radiation stress
摘要
Abstract
A simulated field experiment with three treatments, i. e. , ambient light ( control) , reduced UV-B radiation, and enhanced UV-B radiation, was conducted to evaluate the effects of solar ultraviolet ( UV-B) radiation on the seedlings of Myrica rubra, a typical woody species in subtropical region. The leaf chlorophyll content, spectral reflectance and spectral characteristic parameters were measured and analyzed. As compared with the control, enhanced UV-B radiation decreased the seedling chlorophyll content while reduced UV-B radiation significantly increased the chlorophyll content, and these effects reflected in the spectral reflectance. Under the effects of the three gradients of UV-B radiation, the differences in the reflectance at visible region mainly occurred around the green peak and red edge on the reflectance curve, and the peak wavelength of the red edge shifted to longer wavelength. Enhanced UV-B radiation had an accumulated temporal effect on M. rubra. The inverted-Gaussian model parameters R0, λ0, λp, Rs, and 6 were the useful guides to reveal the spectral responses of M. rubra seedlings under UV-B radiation stress, among which, R8 performed the best. The differences in the spectral reflectance under different UV-B radiation levels could be effectively distinguished with the vegetation indices composed of the spectral reflectance of narrow wave bands or the reflectance at specific wavelengths.关键词
UV-B辐射/叶绿素/光谱/红边/反高斯模型/杨梅Key words
UV-B radiation/ chlorophyll/ spectrum/ red edge/ inverted Gaussian model/ Myrica rubra分类
信息技术与安全科学引用本文复制引用
金鑫杰,江洪,陈健,时启龙,张倩倩..UV-B辐射胁迫下杨梅幼苗的高光谱响应[J].应用生态学报,2012,23(12):3338-3346,9.基金项目
国家自然科学基金重点项目(61190114)、科技部重大国际合作项目(200073819)、浙江省重大科技专项(2008C13G2100010)和浙江农林大学科研启动基金项目(2351000758)资助. （61190114）
