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- W2090800510 abstract "A comparison was made of growth factor requirements and growth factor synthesizing capacity of bacteria from the root surface and from the seeds of flax varieties resistant and susceptible, respectively, to wilt caused by Fusarium oxysporum f. lini. The percentage of bacteria from both root and seed which required growth-promoting substances was greater with the resistant ('Bison') than with the susceptible ('Novelty') variety. On the other hand bacteria capable of synthesizing growth factors were proportionately more abundant with the susceptible variety. The findings indicate a more pronounced rhizosphere effect exerted by the susceptible than by the resistant variety, and point to circumstances that favor a greater accumulation (or 'turnover') of vitamins and related substances at the root surface of susceptible plants.Two strains of Fusarium oxysporum f. lini capable of inducing wilt required no vitamins for growth; thiamine had a depressing effect. Both strains were able to synthesize various growth factors, though in different degree. Culture filtrates of bacteria from roots of the two varieties of flax showed no difference in their effect on growth of Fusarium; however, bacteria from the resistant variety showed somewhat greater ability to depress Fusarium than those from the susceptible. Though the findings do not constitute evidence of any relationship between differences in growth factor relationships to pathogenic potential of Fusarium, they suggest the value of considering growth-promoting substances in studies of the effect of nutrition on the activity of soil-borne pathogens." @default.
- W2090800510 created "2016-06-24" @default.
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- W2090800510 date "1961-01-01" @default.
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- W2090800510 title "MICROBIAL GROWTH FACTORS IN RELATION TO RESISTANCE OF FLAX VARIETIES TO FUSARIUM WILT" @default.
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- W2090800510 doi "https://doi.org/10.1139/b61-002" @default.
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