Relationship between the contents of cellulose and lignin in cotton leaf and their resistance to Apolygus lucorum | 棉花叶片纤维素和木质素含量与绿盲蝽抗性的关系

chinois. 探讨不同生育时期棉花叶片中纤维素和木质素含量与绿盲蝽抗性的关系，为深入研究棉花对绿盲蝽的抗性机制及绿盲蝽综合治理技术体系的构建提供依据。以田间初步筛选出的27个对绿盲蝽有不同程度抗性的棉花品种（系）为材料，通过网室抗性鉴定和室内纤维素和木质素含量测定分析，系统研究不同棉花品种（系）对绿盲蝽的抗性水平及棉花叶片中纤维素和木质素含量与绿盲蝽抗性的关系。供试的27个棉花品种对绿盲蝽的抗性水平总体偏低，多数品种抗性不明显或没有抗性。供试的大多数棉花品种叶片纤维素含量在苗期最高，其次是花铃期和蕾期；棉花花铃期叶片纤维素含量随着棉花对绿盲蝽的抗性的增强而显著升高，而苗期和蕾期棉花叶片中纤维素含量对绿盲蝽抗性没有显著的影响。木质素含量在苗期、蕾期和花铃期差异不显著（P＞0.05）；棉花苗期、蕾期和花铃期叶片中木质素含量对其绿盲蝽抗性没有显著的影响。棉花对绿盲蝽的抗性与花铃期叶片纤维素含量呈显著正相关，但与苗期、蕾期叶片中纤维素含量及苗期、蕾期、花铃期叶片中木质素含量均无显著相关性。

anglais. The study determined the relationship between the contents of cellulose and lignin in cotton leaf and their resistance to Apolygus lucorum to provide basis for the studying of resistance mechanism and construction the IPM for A. lucorum. Using 27 cotton varieties selected from the field as materials, the different resistance levels of different cotton varieties to A. lucorum and the relationship between the content of cellulose and lignin in cotton leaf and their resistance to A. lucorum were studied through the resistant appraising in the net room and testing in laboratory. In most of the varieties tested, the content of cellulose in seedling period was the highest in cotton leaf, and the second in the bolling stage and budding stage. In the bolling stage, the contents of cellulose were higher with the cotton varieties to A. lucorum, but the content of cellulose in seedling and budding periods had not any influence regularitily on cotton resistance to A. lucorum. The contents of lignin in cotton leaf had no significant difference in seedling, budding and bolling period. And there was not any influence regularitily on cotton resistance to A. lucorum in the three periods. The resistance of cotton to A. lucorum was influenced by the content of cellulose and lignin in cotton leaf, and the content of cellulose in bolling period in cotton leaf indicated the clear negative linear correlation with the resistance to A. lucorum, but that the content of cellulose in cotton leaf in budding period and bolling period, and the contents of lignin in cotton leaf in three period indicated no clear positive linear correlation with the resistance to A. lucorum.