杨树冰核活性细菌溃疡病的病理和生理机制(英文)

在1997-1999年间,利用Bier, X.H、波钦诺克、王敬文、史瑞和等人的研究方法,分别对不同品种杨树如:美×青、A100、小黑14、黑小2、613、北京605等接种冰核活性细菌,并对接种前后树皮含水量、相对膨胀度、木质素、苯丙氨酸解氨酶(PAL)活性、电解质渗出率以及无机元素等进行了测定。结果表明:冰核细菌溃疡病发生后,树皮含水率降低,而膨胀度(RT值)升高;树皮内电解质渗出率增加,而在-4 C和5 C时渗出率最高;木质素的含量也有所增加,且与品种的抗病性呈正相关;苯丙氨酸解氨酶活性也有所增加,且与品种的抗病性呈正相关;Cu、Fe含量显著下降,K、Zn含量显著增加,但Mn、Ca、Mg含量变化不大。

Pathogenetic and physiological mechanisms of poplar ice nucleation active bacterial canker

Using the methods introduced by Bier, X.H., Buchinock, Wang Jing-wen, Shi Riheet al., different varieties of poplar (poplar-MeixQing, Poplar-A₁₀₀, Poplar-Xiaohe₁₄ et al.) were inoculated with poplar ice nucleation active (INA) bacteria respectively in 1997–1999. The water content, relative turgidity, lignin content, phenylalanine ammonialyase (PAL) activity, electrolyte effusion rate, and inorganic element content of poplar bark were measured before and after inoculating. The results showed that after the poplar trees were inoculated with INA bacteria, the moisture content of bark decreased but relative turgidity increased, electrolyte effusion rate increased and had a peak at temperatures of −4 and 5°C, lignin content increased and positively correlated with poplars’ disease-resistance and the plenylalanine ammonialyase activity increased and also showed a significant positive correlation with poplars' disease-resistance. For the contents of inorganic element, Cu and Fe decreased but K and Zn increased obviously, while Mn, Ca and Mg changed little. Foundation item: This paper was supported by National Foundation of Ninth Five-Year Plan (No. 96-005-04-01-03). Biography: Dong Ai-rong (1971), male, Ph. Doctor, lecturer in Northeast Forestry University, Harbin 150040, P. R. China and presently as postdoctoral researcher in Shenyang Agriculture University, Shenyang 110161, P. R. China Responsible editor: Zhu Hong