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The rhizobacterium Arthrobacter agilis produces dimethylhexadecylamine, a compound that inhibits growth of phytopathogenic fungi in vitro
Plant diseases caused by fungal pathogens such as Botrytis cinerea and the oomycete Phytophthora cinnamomi affect agricultural production worldwide. Control of these pests can be done by the use of fungicides such as captan, which may have deleterious effects on human health. This study demonstrates...
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Published in: | Protoplasma 2013-12, Vol.250 (6), p.1251-1262 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Plant diseases caused by fungal pathogens such as
Botrytis cinerea
and the oomycete
Phytophthora cinnamomi
affect agricultural production worldwide. Control of these pests can be done by the use of fungicides such as captan, which may have deleterious effects on human health. This study demonstrates that the rhizobacterium
Arthrobacter agilis
UMCV2 produces volatile organic compounds that inhibit the growth of
B
.
cinerea
in vitro. A single compound from the volatile blends, namely dimethylhexadecylamine (DMHDA), could inhibit the growth of both
B
.
cinerea
and
P
.
cinnamomi
when supplied to the growth medium in low concentrations. DMHDA also inhibited the growth of beneficial fungi
Trichoderma virens
and
Trichoderma atroviride
but at much higher concentrations. DMHDA-related aminolipids containing 4, 8, 10, 12, and 14 carbons in the alkyl chain were tested for their inhibitory effect on the growth of the pathogens. The results show that the most active compound from those tested was dimethyldodecylamine. This effect correlates with a decrease in the number of membrane lipids present in the mycelium of the pathogen including eicosanoic acid, (
Z
)-9-hexadecenoic acid, methyl ester, and (
Z
)-9-octadecenoic acid, methyl ester. Strawberry leaflets treated with DMHDA were not injured by the compound. These data indicate that DMHDA and related compounds, which can be produced by microorganisms may effectively inhibit the proliferation of certain plant pathogens. |
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ISSN: | 0033-183X 1615-6102 |
DOI: | 10.1007/s00709-013-0506-y |