Huang Ben-Li, Xu Yun-Dong, Wu Ye, Zhang Shun-Qi, Chen Xue-Hao
Agricultural College, Yang-zhou University, Yangzhou 225009, Jiangsu, China.
Ying Yong Sheng Tai Xue Bao. 2007 Mar;18(3):559-63.
With the root exudates of two cucumber varieties Jinyan 4 (susceptible variety) and Jinchun 4 (resistant variety) and of black seed squash variety as test materials, this paper studied their effects and action mechanisms on the occurrence of Fusarium wilt on Jinyan 4. The results showed that the occurrence of Fusarium wilt was earlier when treated with the root exudates of Jinyan 4, and the infection rate was significantly higher at 15 days after inoculation, but nearly the same as the control at 20 days after inoculation. On the contrary, the infection rate was significantly lower than the control when treated with the root exudates of Jinchun 4. The plant height and fresh mass of Jinyan 4 treated with its own root exudates were lower than those of the control, and the root vigor decreased but conductance increased. No significant effect was observed in the plant height and fresh mass of Jinyan 4 treated with the root exudates of Jinchun 4 and black seed squash. It could be concluded that the root exudates of susceptible cucumber variety stimulated the growth of Fusarium oxysporum pathogen, while those of resistance cucumber variety and black seed squash were in adverse.
以两个黄瓜品种津研4号（感病品种）和津春4号（抗病品种）以及黑籽南瓜品种的根系分泌物为试验材料，研究了它们对津研4号黄瓜枯萎病发生的影响及其作用机制。结果表明，用津研4号的根系分泌物处理时，枯萎病发病较早，接种后15天的感染率显著高于对照，但接种后20天与对照相近。相反，用津春4号的根系分泌物处理时，感染率显著低于对照。用自身根系分泌物处理的津研4号的株高和鲜质量低于对照，根系活力下降但电导率增加。用津春4号和黑籽南瓜的根系分泌物处理的津研4号的株高和鲜质量未观察到显著影响。可以得出结论，感病黄瓜品种的根系分泌物刺激了尖孢镰刀菌病原菌的生长，而抗病黄瓜品种和黑籽南瓜的根系分泌物则起相反作用。
