假单胞菌株JKD—2分泌铁载体抑制稻瘟病菌

SIDEROPHORE PRODUCTION AND THEIR ACTIVITY AGAINST PIRICULARIA ORYZAE BY PSEUDOMONAS JKD-2

利用铬奥醇（CAS）分析法测定了假单胞菌（Pseudomonassp．）JKD－2分泌铁载体的特征。在无铁环境下JKD-2菌能分泌高亲和力的铁载体；在低铁条件下，铁载体的分泌量减少；在富铁环境下，则不能分泌。结果还显示菌株JKD-2在无铁条件下分泌的铁载体，能在低铁条件下抑制稻瘟病菌（Piriculariaoryzae）的生长。

The present study demonstrates the siderophore produchon of Pseudomonas sp. JKD-2, measured by the chrome azurol S (CAS) assay. The stUdy shows that JKD--2 produces bigh-affinity iron-transport molecule siderophore in irondeficient media while not produces in iron-rich media Furthermore, the results illustrate that the siderophore excreted by JKD-2 can suppress Piricularia oryzae growth in a bioassny.