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Pyrrolnitrin production by Burkholderia cepacia strain 5.5B was closely related to suppression of stem rot of poinsettia caused by Rhizoctonia solani. Selected strains RR 13-1 and UV 19-4, which produced significantly less pyrrolnitrin than the parent strain 5.5B, lost the ability to control stem rot completely. Selected strain RR 21-2 produced the same level of pyrrolnitrin as strain 5.5B and was...
DIMBOA (2,4-dihydroxy-7-methoxy-1,4(2H)-benzoxazin-3-one), a corn (maize) secondary metabolite, is lethal to the cells of tobacco, carrot root slices and to both DIMBOA-producing (B73) and non-producing (bxbx) varieties of corn. Application of DIMBOA to wounded tobacco leaf petioles causes a black lesion and shrivelling of the whole leaf, presumably resulting from death of DIMBOA-treated cells and...
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