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杨树溃疡病 (DothiorellagregariaSacc .)是危害杨树的一种重要病害。对此病的抗性 ,不同杨树品种之间存在着差异。本试验选取了 9种 (包括品种 )杨树进行试验。通过室内接种试验证明 ,日本白杨高度抗病 ,加杨属抗病型 ,群众杨 4 4 #和路易莎高度感病 ,北京杨 1#、 80 0 0 #、群众杨 36 #、 4 3#和沙兰杨为感病型。与抗病性有关的因素中 ,过氧化物酶的活性与抗病性呈正相关 ,过氧化物酶同功酶的变化也反映了树体抗病性的变化。树皮相对膨胀度 (RT)的大小不能作为抗病与否的指标。电导率与抗病性有负相关趋势 ,但不能确定其负相关性。
Poplar canker disease (Dothiorella gregaria Sacac.) Is an important disease endangering poplar. Resistance to this disease, there are differences between different poplar varieties. This experiment selected 9 species (including varieties) of poplar for testing. The indoor inoculation test showed that the Japanese white poplar is highly resistant to the disease and poplar belongs to the disease resistance type. The population Yang 4 4 # and Louisa height sickness, the Beijing Yang 1 #, 80 0 0 #, the poplar 36 #, 43 # and sand Lan Yang for the flu type. Among the factors related to disease resistance, the activity of peroxidase was positively correlated with disease resistance, and the change of peroxidase isoenzyme also reflected the change of tree disease resistance. Bark relative expansion (RT) size can not be used as an indicator of disease resistance. Conductivity and disease resistance have a negative correlation trend, but can not determine the negative correlation.