Leaf optical properties in higher plants: Linking spectral characteristics to stress and chlorophyll concentration
Leaf optical properties in higher plants: Linking spectral characteristics to stress and chlorophyll concentration
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DOI：
10.2307/2657068
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发表时间：
2001-04-01
影响因子：
3
通讯作者：
Knapp, AK
中科院分区：
文献类型：
--
作者：
Carter, GA;Knapp, AK
许多研究已经将叶片光谱反射率、透射率或吸收率对生理胁迫的响应联系起来。各种压力源包括脱水，洪水，冷冻，臭氧，除草剂，竞争，疾病，昆虫。并且外生菌根发育和氮肥施用的不足已经强加于从草到针叶树和落叶树的物种。在所有情况下，对照和强制降解状态之间在400-850 nm波长范围内的反射率最大差异发生在700 nm附近波长处的反射率增加时。在包括透射率、吸收率和反射率的研究中，最大差异分别在700 nm附近增加和减少。这种常见的光学应力响应可以模拟密切不同的叶绿素浓度的模型叶片（玻璃纤维过滤垫）和叶片叶绿素浓度的自然变异在衰老的叶片中的五个物种。在700 nm附近的压力，以及相应的变化，发生在绿-黄光谱的反射率的光学响应，可以解释的一般趋势的压力，以减少叶片叶绿素浓度。
A number of studies have linked responses in leaf spectral reflectance, transmittance, or absorptance to physiological stress. A variety of stressors including dehydration, flooding, freezing, ozone, herbicides, competition, disease, insects. and deficiencies in ectomycorrhizal development and N fertilization have been imposed on species ranging from grasses to conifers and deciduous trees. In all cases, the maximum difference in reflectance within the 400-850 nm wavelength range between control and stressed states occurred as a reflectance increase at wavelengths near 700 nm. In studies that included transmittance and absorptance as well as reflectance, maximum differences occurred as increases and decreases, respectively, near 700 nm. This common optical response to stress could be simulated closely by varying the chlorophyll concentration of model leaves (fiberglass filter pads) and by the natural variability in leaf chlorophyll concentrations in senescent leaves of five species. The optical response to stress near 700 nm, as well as corresponding changes in reflectance that occur in the green-yellow spectrum, can be explained by the general tendency of stress to reduce leaf chlorophyll concentration.