美洲黑杨叶片主要化学物质差异及其对杨四瘿螨的抗性

Difference of the Main Chemical Substances in Populus deltoides Leaves and Its Resistance to Tetra lobulifera

研究18个美洲黑杨无性系苗期叶片可溶性糖、蛋白质和总酚等主要化学物质含量差异及对杨四瘿螨抗性差异的影响。结果表明,苗期叶片中可溶性糖、蛋白质和总酚含量等性状无性系间存在极显著差异。相关分析结果表明:美洲黑杨苗期叶片可溶性糖和总酚含量等性状差异与抗杨四瘿螨有密切关系,而蛋白质含量的高低与抗性关系不密切。苗期叶片中总酚含量越高,美洲黑杨对杨四瘿螨抗性越强,反之抗性就越弱。

The variation of the content of soluble sugar, protein and total phenolics in leaves of 18 clones of Populus deltoides at seedling stage was measured, and the relationship with the clones＇ resistance to Tetra Iobulifera was analyzed. The results showed that there was significant difference in the contents of soluble sugar, protein and total phenolics in the leaves among the clones. Correlation analysis indicated that the contents of soluble sugar and total phenolics in leaves of P. deltoides were significantly correlated with the resistance to T. lobulifera, while the content of protein in the leaves was not correlated with the resistance. The clones with higher content of total phenolics in the leaves were mite resistant, conversely were mite susceptible.