Stimulation of Agrobacterium tumefaciens Growth by Azotobacter vinelandii Ferrisiderophores.
Azotobacter vinelandii stimulated the growth of Agrobacterium tumefaciens H2, H23, H24, H27, and ATCC 15955 on media containing insoluble iron sources. The Azotobacter vinelandii siderophores appeared to promote Agrobacterium tumefaciens growth by solubilizing mineral iron, and the ferrisiderophores so formed then acted as iron sources for Agrobacterium tumefaciens. Agrobactin, the Agrobacterium siderophore, appeared to be inefficient in solubilizing mineral iron directly.
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W J
WJ
Department of Microbiology, University of Alberta, Edmonton, Alberta, Canada T6G 2E9.
Dale
P L
PL