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本文报道萤光假单胞菌(fluorescent Pseudomas spp.)WCSX 13.WCS 417andWCS 358在水培系统中香石竹根部的定殖及其对香石竹镰刀菌枯萎病的抑制作用。细菌处理两周后,WCS 417在感病品种Lena和中抗品种Pallas根部的定殖分别为8.8×10~2cfu/cm和9.8×10~2cfu/cm,而WCS 358分别为0.9×10~2cfu/cm和0.13×10~2cfu/cm。在通气的三角瓶中水培的Pallas品种,人工接种病原菌香竹石尖镰孢Fusarium oxyspotum f.sp.dianthi(Prill.&Del.)Snyd.&Hans.(Fod)6周后,用WCSX·13和WCS 417根部处理的病指分别为0.19和0.31,未细菌处理的对照为0.58,细菌处理植株的根部及茎内组织的病原菌种群密度低于对照。营养膜技术(NFT)栽培的Lena品种,WCS 417细菌处理的发病率比对照减少13%。
This paper reports the colonization of the root of Carnation by fluorescent Pseudomonas WCSX 13.WCS 417 and WCS 358 in hydroponics system and its inhibitory effect on Fusarium wilt of Carnation. After two weeks of bacterial treatment, the colonization rate of WCS 417 in susceptible and resistant varieties Pallas was 8.8 × 10 ~ 2 cfu / cm and 9.8 × 10 ~ 2 cfu / cm, respectively, while WCS 358 was 0.9 × 10 ~ 2 cfu / cm / cm and 0.13 × 10 ~ 2cfu / cm. Six weeks after the pathogen Fusarium oxyspotum f. Sp. Dianthi (Prill. & Del.) Snyd. & Hans. (Fod) was hydrolized in aerated flask containing Pallas variety WCSX-13 and WCS The pathological indexes of 417 roots were 0.19 and 0.31, respectively, and those of non-bacteria control were 0.58. The density of pathogens in the roots and stem tissues of bacteria-treated plants was lower than that of the control. The Lena variety cultivated with Nutrient Membrane Technology (NFT) showed a 13% reduction in the incidence of bacterial treatment of WCS 417 compared to the control.