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INVESTIGATIONS OF THE INHIBITORY ACTION OF BACILLUS SUBTILIS ON FUSARIUM UDUM BUTL., THE FUNGUS CAUSING WILT OF PIGEON‐PEA ( CAJANUS CAJAN (L.) MILLSP.)
Author(s) -
VASUDEVA R. S.,
JAIN A. C.,
NEMA K. G.
Publication year - 1952
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1952.tb00902.x
Subject(s) - biology , cajanus , bacillus subtilis , botany , fungus , fusarium wilt , horticulture , fusarium oxysporum , bacteria , genetics
A suitable basic medium for the growth of Bacillus subtilis , particularly in relation to the production of an antibiotic inhibitory to Fusarium udum , is described. Organic nitrogen with carbohydrate and K 2 HPO 4 is shown to be essential for the growth of Bacillus subtilis. Magnesium sulphate, manganese and iron are found to increase the production of the antibiotic. Effects of temperature, period of incubation, aeration, etc., on the production of the inhibitory substance are described. The active principle is adsorbed by soil and to a lesser degree by kaolin. The organic matter and the soluble salts in the soil do not appear to play an important role in the loss of activity of the filtrates during passage through a bed of soil.