Study On Resistance Variation Of Populus Deltoides Clones In The Seedling Stage To Tetra Lobulifera (Keifer)

In this paper, the 26 one-year-old Populus deltoides clones in the seedling stage samples trait variation of the anti- Tetra lobulifera (Keifer). And to explore Populus deltoides mechanism of resistance variation.1,Using the index of leaf injury as resistance appraisal standard, Nanjing, Sihong difference between the two places as a contrast. The results indicated that 1, 17, NL-106, S3 are phenotype high resistant clones and 3, 7, 9, 11, 12, 22, 24 clones are phenotype high sense of Tetra lobulifera (Keifer) species.2,Differences in leaf anatomy affect the ability of Populus deltoides anti- Tetra lobulifera (Keifer). High-resistance clones (1, 17, 19, 21, 23, S3, NL-106) have a"intensive prominent vein-type"structure. High infectious clones (2, 3, 9, 11, 12, 22, 24) have a"invagination vein-type"structure.3,The substances of Ethyl acetate layer extracted impact on the content of Populus deltoides clones of high and low resistance. High-resistance clones (1, 17, NL-106, S3) have high levels in leaves. High infectious clones (24, 22, 11) have low levels of leaf samples.4,Biological activity tests to prove: Ethyl acetate extract layer off of the Tetra lobulifera (Keifer) have the ability and the ability to kill.5,High infectious P.deltoides Tetra lobulifera (Keifer) contain a large number of erosion-induced nutrient. Such as: carbohydrates, fats, vitamins. High-resistance P.deltoides contain highly toxic phenols that species infection do not have or rarely available. And irritating gases will be volatile alcohol esters. Leaf wax layer of the main components of glycidol content also affected the ability of P.deltoides anti- Tetra lobulifera (Keifer). Clones with high content have a high resistance. Clones with low content infect Tetra lobulifera (Keifer) severely.