The Biocontrol Functions of Bacillus velezensis Strain Bv-25 Against Meloidogyne incognita
is obligate parasitic nematode with a wide variety of hosts that causes huge economic losses every year. In an effort to identify novel bacterial biocontrols against , the nematicidal activity of strain Bv-25 obtained from cucumber rhizosphere soil was measured. Strain Bv-25 could inhibit the egg ha...
Saved in:
Published in | Frontiers in microbiology Vol. 13; p. 843041 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
Frontiers Media S.A
07.04.2022
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | is obligate parasitic nematode with a wide variety of hosts that causes huge economic losses every year. In an effort to identify novel bacterial biocontrols against
, the nematicidal activity of
strain Bv-25 obtained from cucumber rhizosphere soil was measured. Strain Bv-25 could inhibit the egg hatching of
and had strong nematicidal activity, with the mortality rate of second-stage
juveniles (J2s) at 100% within 12 h of exposure to Bv-25 fermentation broth. The
genes
,
, and
were suppressed by Bv-25 fumigation treatment after 48 h. Strain Bv-25 could colonize cucumber roots, with 5.94 × 10
colony-forming units/g attached within 24 h, effectively reducing the infection rate with J2s by 98.6%. The bacteria up-regulated the expression levels of cucumber defense response genes
,
, and
and induced resistance to
in split-root trials. Potted trials showed that Bv-25 reduced cucumber root knots by 73.8%. The field experiment demonstrated that disease index was reduced by 61.6%, cucumber height increased by 14.4%, and yield increased by 36.5% in Bv-25-treated plants compared with control. To summarize,
strain Bv-25 strain has good potential to control root-knot nematodes both when colonizing the plant roots and through its volatile compounds. |
---|---|
Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Edited by: F. L. Consoli, University of São Paulo, Brazil This article was submitted to Systems Microbiology, a section of the journal Frontiers in Microbiology Reviewed by: Ioannis Giannakou, Agricultural University of Athens, Greece; Olubukola Oluranti Babalola, North-West University, South Africa These authors have contributed equally to this work |
ISSN: | 1664-302X 1664-302X |
DOI: | 10.3389/fmicb.2022.843041 |