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Location of branches within the apical hyphal region of Streptomyces granaticolor mycelia
Author(s) -
Kretschmer S.
Publication year - 1992
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.3620320112
Subject(s) - hypha , apical cell , mycelium , elongation , chemostat , branching (polymer chemistry) , biology , apex (geometry) , botany , chemistry , cell , biochemistry , genetics , materials science , organic chemistry , bacteria , metallurgy , ultimate tensile strength
The location of branches (ramifications) within the apical hyphal region of Streptomyces granaticolor mycelia was studied in dependence on the specific growth rate by using batch and chemostat cultures. The site where a new branch emerged was correlated to the neighboured elongation sites ( e ‐sites) as well as to the septae. In dependence on the growth rate the distance from a newly formed branch (i. e. e ‐site) to the apical e ‐site (tip of the main hypha) changed from 12 to 44 μm and to the e ‐site on the tip of the preceding neighboured branch from 12 to 27 μm. Thus, except for the slowest grown culture, the new branching site in the apical hyphal region did not represent the midst between the two preexisting e ‐sites. Comparing branching and septation sites, the data indicated a close correlation between them, if the respective mean values of whole populations were determined. But regarding individual hyphae, only 4–39% – depending on the growth rate – of the apical branches were directly neighboured to a septum. The remaining percentage was situated at one of several potential branching sites, the number of which per subapical cell corresponded to the number of nucleoids.