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STUDIES IN THE BACTERIAL DIE‐BACK AND CANKER DISEASE OF POPULAR. II. THE RELATION BETWEEN THE BACTERIAL SLIME AND THE CAUSAL ORGANISM
Author(s) -
SABET K. A.
Publication year - 1953
Publication title -
proceedings of the society for applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0370-1778
DOI - 10.1111/j.1365-2672.1953.tb00027.x
Subject(s) - infectivity , bacteria , inoculation , microbiology and biotechnology , canker , biology , pathogen , asparagine , microorganism , botany , enzyme , biochemistry , virology , horticulture , virus , genetics
SUMMARY: The bacteria in the slime are capsulated and withstand drying longer than the non‐capsulated from derived from cultures. The natural slime is either neutral or slightly alkaline in reaction but turns acid when kept under humid conditions; it contains available nutrients, a toxic substance and two pectic enzymes. Certain substances belonging to the classes of compound detected in natural slime were tested to see whether they would increase the infectivity of the bacteria, and it was found that glutamine and asparagine caused a considerable increase. Cultures of the pathogen 10 weeks old contained a wilt producing toxin which also apparently increased the infectivity. Inoculation of acidified suspensions reduced infectivity. Typical cankers were not produced by adding nutrients to bacteria inoculated into popular twigs. The slime provides a particularly suitable substrate possessing the optimum requirements for infection.