CHANGES IN LEAF SPECTRAL PROPERTIES INDUCED IN BARLEY BY CEREAL POWDERY MILDEW
CHANGES IN LEAF SPECTRAL PROPERTIES INDUCED IN BARLEY BY CEREAL POWDERY MILDEW
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DOI：
10.1016/0034-4257(89)90018-7
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发表时间：
1989-02-01
影响因子：
13.5
通讯作者：
JENSEN, A
中科院分区：
文献类型：
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作者：
LORENZEN, B;JENSEN, A
在大麦叶片中引起的谷物霉菌的光谱特性的变化进行了评估，以确定重要的区域，在400-1100 nm的光谱，可用于检测感染大麦叶片。用霉菌接种五个生长在温室中的春大麦品系。在20天的时间内，记录了第一叶片近轴面的定向光谱反射率以及gd.wt. cm ~（-2）叶面积、含水量和叶片叶绿素总含量。1)在整个实验过程中，对照叶片和接种的抗性叶片的光谱反射率非常相似。2)在接种后的前3天内，接种叶片的光谱反射率没有明显变化。3)接种后6天，感病株系在可见光（422-712 nm）波长范围内表现出显著较高的反射率。4)接种后10天，感病株系在400和1100 nm之间的光谱反射率显着高于对照植株。5)观察到的控制和受感染的植物之间的近红外反射率的差异很小，发生几天后，在可见光区的变化。6)对照和接种植株之间的蓝色和红色波段的反射率的差异与叶绿素含量高度相关，r = 0.89和0.95，分别。7)受霉菌感染的单叶的光谱反射率的显著变化在光谱的可见光区域（400-706 nm）比在光谱的近红外部分更早发生。
Changes in spectral properties induced in barley leaves by cereal mildew were evaluated to identify important regions in the 400-1100 nm spectrum which can be used to detect infected barley leaves. Five spring barley lines grown in greenhouses were inoculated with mildew. During a 20-day period the directional spectral reflectance of the adaxial surface of the first leaf blades was recorded as well as the g d.wt. cm-2 leaf area, % water, and total chlorophyll content of the leaves. 1) The spectral reflectance of control leaves and inoculated resistant leaves was very similar throughout the experiment. 2) No changes in spectral reflectance from inoculated leaves were evident within the first 3 days following inoculation. 3) Six days after inoculation, the susceptible lines showed significantly higher reflectance in the visible (422-712 nm) wavelength region. 4) Ten days after inoculation, the susceptible lines showed significantly higher spectral reflectance between 400 and 1100 nm compared to control plants. 5) The differences in near infrared reflectance between control and infected plants observed were small and occurred several days later than changes in the visible region. 6) The differences in reflectance of blue and red wavebands between control and inoculated plants were highly correlated to the chlorophyll content of infected leaves, r = 0.89 and 0.95, respectively. 7) Significant changes in spectral reflectance of single leaves infected with mildew occur earlier in the visible region of the spectrum (400-706 nm) than in the near infrared part of the spectrum.