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通过测定灰飞虱在12个不同类型水稻品种上的取食选择性和稻株的含水量、可溶性糖含量、蛋白质含量及粗纤维含量,激光共聚焦显微镜观察稻叶片和茎杆的结构及硅化细胞分布,从养分组成和显微结构两个方面研究灰飞虱对寄主的选择性及其影响因子。结果表明:在植株的养分组成中,对灰飞虱取食选择性起决定性作用的是粗纤维含量,它与虫口密度显著负相关,相关系数达-0.96;而蛋白质含量和含水量均与虫口密度显著正相关,相关系数分别为0.79和0.89,植株可溶性糖含量对灰飞虱取食选择性影响不显著。在显微结构方面,植株硅化细胞体积和密度大、叶脉间距小、叶脉宽的水稻品种对灰飞虱的非选择性强。
The feeding selectivity and the water content, soluble sugar content, protein content and crude fiber content of rice planthopper on 12 different types of rice varieties were determined by laser scanning confocal microscopy. The structure and silicification of rice leaf and stem Cell distribution, from the nutrient composition and microstructure of the two studies on the host’s selectivity and its impact factors. The results showed that the crude fiber content, which had a decisive influence on the feeding selectivity of L. striatellus, was significantly negatively correlated with the density of insect population, with a correlation coefficient of -0.96. The protein content and water content were both correlated with insect population The correlation coefficient was 0.79 and 0.89, respectively. The soluble sugar content of plant had no significant effect on the feeding selectivity of L. striatellus. In terms of microstructure, the silicate cells in the plant had the characteristics of large volume and density, small inter-leaf distance and wide leaf width and non-selectivity for the SBPH.