The effects of medium nutritional profile on Bacillus sp. Par 3 plant-growth promoting and biocontrol activity against Botrytis cinerea
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Published:2023
Issue:3
Volume:38
Page:99-110
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ISSN:1820-3949
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Container-title:Pesticidi i fitomedicina
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language:en
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Short-container-title:Pesticidi i fitomedicina
Author:
Dujkovic Tatjana1ORCID, Pajcin Ivana1, Vlajkov Vanja1ORCID, Sovljanski Olja1ORCID, Markov Sinisa1, Loc Marta2ORCID, Grahovac Mila2ORCID, Grahovac Jovana1ORCID
Affiliation:
1. University of Novi Sad, Faculty of Technology Novi Sad, Novi Sad, Serbia 2. University of Novi Sad, Faculty of Agriculture, Novi Sad, Serbia
Abstract
Substantial agricultural losses resulting from plant diseases caused by
different plant pathogens are one of the worldwide challenges today. Among
these, Botrytis cinerea, responsible for gray mold disease, stands out for
its capacity to devastate significant quantities of diverse valuable crops.
Utilization of biocontrol agents for suppressing phytopathogens has become
imperative, and bacteria from the genus Bacillus hold an immense potential
due to their rapid replication rate, resistance to adverse environmental
conditions, enhanced effectiveness in promoting plant growth and
broad-spectrum activity. The objective of this study was to determine the
best sources of carbon, nitrogen and phosphorus in cultivation media with
the aim of maximizing both antimicrobial activity against B. cinerea and
plantgrowth-promoting (PGP) potential during the early stages of cucumber
plant development, exhibited by Bacillus sp. isolate Par 3. Antimicrobial
activity was tested using the well diffusion method. The influence of
Bacillus sp. isolate Par 3 on plant germination was tested on cucumber
seeds. The largest inhibition zones were achieved in two cases, with 1)
sucrose as carbon source, ammonium nitrate as nitrogen source, and
diammonium hydrogen phosphate as phosphorus source and 2) glycerol as carbon
source, ammonium nitrate as nitrogen source and dipotassium hydrogen
phosphate as phosphorus source. Seeds treated with a culture liquid of
Bacillus sp. isolate Par 3 using the optimized medium exhibited the best
results in terms of cucumber germination percentage (100%), root length
(53.09 mm) and shoot length (13.26 mm). Bacillus sp. Par 3 isolate was
identified as Bacillus subtilis using 16S rRNA gene sequencing. The results
of this study underscore the significance of media optimization for the
production of biocontrol agents, taking into account both antimicrobial
efficacy and PGP characteristics.
Funder
Ministry of Education, Science and Technological Development of the Republic of Serbia
Publisher
National Library of Serbia
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