Inhibitory Reactions between Natural Isolates of Streptomyces

Abstract

Nine different strains of Streptonijws ('S. scabies') have been isolated from scab lesions on potato tubers. These strains were obtained from different cultivars grown in different geographical areas. Four different types of inhibitory reactions were observed when these strains were tested in pairs with each other. Three of these inhibitory reactions resembled the lethal zygosis phenotype that has been reported for other species of Streptomyces. All of the strains exhibited at least two of these inhibitory reactions and were sensitive to the inhibitory reactions of at least six of the other isolates. Five of these isolates were shown to harbour plasmid DNA.

Interactions and biocontrol of pathogenicStreptomycesstrains co-occurring in potato scab lesions

“…Biological control of common scab is one of the attractive possibilities. Suppressiveness against common scab pathogens can develop naturally in potato fields owing to antagonistic micro‐organisms and reduce the severity of disease (McQueen et al. 1985; Lorang et al.…”

Purification and characterization of a novel extracellular esterase from pathogenic Streptomyces scabies that is inducible by zinc

“…1). Two pathogenic isolates (S. scabies FL1 and PNT1 [16]) and two nonpathogenic isolates (S. scabies ME2 and S. lividans 1326) were grown with suberin as the sole carbon source. The FL1 and PNT1 isolates (Fig.…”

“…The inducibility of esterase production by zinc was also studied. (16). To obtain spore preparations, the Streptomyces isolates were grown on either R2 regeneration medium (17) or oatmeal agar medium (21) at 30°C.…”

Heterologous expression and secretion of a Streptomyces scabies esterase in Streptomyces lividans and Escherichia coli

“…Pathogen-produced enzymes that degrade suberin would most likely be secreted in order to interact with this insoluble matrix on the plant surface. An extracellular esterase which may be involved in suberin breakdown has been isolated and characterized from the pathogenic S. scabies strain FL1 (31).…”