Open AccessEvidence for the independent regulation of hyphal extension and branch initiation in Fusarium graminearum A3 5
Author(s) -
Wiebe Marilyn G,
Robson Geoffrey D,
Trinci Anthony P.J
Publication year - 1992
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1992.tb05148.x
Subject(s) - hypha , mycelium , fusarium , biology , choline chloride , sodium , choline , botany , microbiology and biotechnology , chemistry , biochemistry , organic chemistry
Addition of 100 μM choline chloride to the medium increased (by approx. 36%) both the length of the hyphal growth unit ( G a measure of mycelial branching) and the mean hyphal extension rate ( E ) of Fusarium graminearum but did not increase the maximum rate of extension of the hyphae ( E max ). The paramorphogen, edifenphos (Hinosan) reduced G and E without affecting specific growth rate (μ). However, when mycelia were treated with edifenphos plus choline, μ was reduced, G was increased by approx. 35%, but E and E max were not affected. The results suggest that the primary effect of edifenphos is inhibition of hyphal extension, whilst the primary effect of choline is inhibition of branch initiation.