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@ARTICLE{Rupela:40468,
author = {Rupela, O. P. and Gopalakrishnan, S. and Krajewski, M. and
Sriveni, M.},
title = {{A} novel method for the identification and enumeration of
microorganisms with potential for suppressing fungal plant
pathogens},
journal = {Biology and fertility of soils},
volume = {39},
issn = {0178-2762},
address = {Berlin},
publisher = {Springer},
reportid = {PreJuSER-40468},
pages = {131 - 134},
year = {2003},
note = {Record converted from VDB: 12.11.2012},
abstract = {This paper describes a method that allowed counting of both
the total culturable and antagonistic microorganisms in a
given source such as compost. Fusarium solani, used as the
test fungus, was spread-plated on quarter-strength (1/4)
potato dextrose agar (PDA), its surface was exposed in a
laminar flow for 4 h and then another layer (2-3 mm thick)
of 1/4 PDA was poured over it, on which an appropriate
dilution of a compost sample was spread-plated.
Microorganisms in the compost samples appeared first, and
were counted as total culturable organisms. Plates were
further incubated until F. solani grew through the upper
layer of PDA (generally in 4-8 days) and covered the whole
plate including most of the microbial colonies, except for a
few which had a halo around them. These were counted as
antagonistic, and they were isolated and purified for
further studies. The population of bacteria in the six
specific compost samples (called Biodynamic or BD
preparations by organic farmers) ranged from 3.45 log(10)
(in BD502) to 8.59 log(10) (in BD504) per gram of materials.
The population of antagonistic bacteria was counted for
three of the six compost samples, and ranged from 3.24
log(10) (in BD502) to 6.90 log(10) (in BD500). Of the 67
bacterial isolates showing a halo that were assembled from
different sources, 17 suppressed at least 1 of the 4 plant
pathogenic fungi against which these were evaluated using
the dual culture method.},
keywords = {J (WoSType)},
cin = {ICG-IV},
ddc = {630},
cid = {I:(DE-Juel1)VDB50},
pnm = {Chemie und Dynamik der Geo-Biosphäre},
pid = {G:(DE-Juel1)FUEK257},
shelfmark = {Soil Science},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000187186400010},
doi = {10.1007/s00374-003-0680-8},
url = {https://juser.fz-juelich.de/record/40468},
}