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番木瓜叶子罹致花斑叶病,其分离叶绿体的二阶导数吸收光谱的较长波长吸收峰687、698、702毫微米和叶绿素b 的85毫微米吸收峰显著消减。表明花斑叶病的侵染引起叶绿素库色素成分的变化。在相同的叶绿素含量基础上,罹病叶子所分离叶绿体的光系统Ⅱ荧光发射强度较健康叶子的低10.6%。花斑叶病的侵染降低叶绿素所吸收光的激发能的传递和利用效率。罹病叶子的光合速率为8.96微克分子·米~(-2)·秒~(-1),仅相当于健康叶子的56.2%;叶子的CO_2传导率为健康叶子的39.5%;细胞间的CO_2浓度较健康叶子低15%。罹病叶子的蒸腾作用的速率和水分传导率较健康叶子的低。叶子罹致花斑叶病引起叶子物理特性的变化。
Papaya leaves caused leaf spot disease. The longer wavelength absorption peaks 687, 698, 702 nm and the chlorophyll b 85 nm absorption peak of the second derivative absorption spectra of chloroplasts were significantly reduced. Show that the mosaic leaf spot disease caused by changes in chlorophyll pigment composition. Based on the same chlorophyll content, photosystem II fluorescence intensity of chloroplasts isolated from diseased leaves was 10.6% lower than that of healthy leaves. Infection of ecodesistra reduces the transfer and utilization efficiency of the excitation energy of chlorophyll-absorbed light. The photosynthetic rate of diseased leaves was 8.96 μg · m -2 · s -1, equivalent to 56.2% of healthy leaves. The leaf CO 2 conductivity was 39.5% of healthy leaves. The intracellular CO 2 concentration 15% lower than healthy leaves. The diseased leaves transpiration rate and moisture conductivity lower than healthy leaves. Changes of Leaf Physical Properties Caused by Leaf Spot Disease.