The fungal endophyte Penicillium olsonii ML37 reduces Fusarium head blight by local induced resistance in wheat spikes
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The fungal endophyte Penicillium olsonii ML37 reduces Fusarium head blight by local induced resistance in wheat spikes. / Rojas, Edward C.; Jensen, Birgit; Jørgensen, Hans J.L.; Latz, Meike A.C.; Esteban, Pilar; Collinge, David B.
In: Journal of Fungi, Vol. 8, No. 4, 345, 2022.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - The fungal endophyte Penicillium olsonii ML37 reduces Fusarium head blight by local induced resistance in wheat spikes
AU - Rojas, Edward C.
AU - Jensen, Birgit
AU - Jørgensen, Hans J.L.
AU - Latz, Meike A.C.
AU - Esteban, Pilar
AU - Collinge, David B.
N1 - Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022
Y1 - 2022
N2 - The fungal endophyte Penicillium olsonii ML37 is a biocontrol agent of Fusarium head blight in wheat (caused by Fusarium graminearum), which has shown a limited direct inhibition of fungal growth in vitro. We used RNA-seq and LC-MS/MS analyses to elucidate metabolic interactions of the three-way system Penicillium–wheat–Fusarium in greenhouse experiments. We demonstrated that P. olsonii ML37 colonises wheat spikes and transiently activates plant defence mechanisms, as pretreated spikes show a faster and stronger expression of the defence metabolism during the first 24 h after pathogen inoculation. This effect was transient and the expression of the same genes was lower in the pathogen-infected spikes than in those infected by P. olsonii alone. This response to the endophyte includes the transcriptional activation of several WRKY transcription factors. This early activation is associated with a reduction in FHB symptoms and significantly lower levels of the F. graminearum metabolites 15-acetyl-DON and culmorin. An increase in the Penicillium-associated metabolite asperphanamate confirms colonisation by the endophyte. Our results suggest that the mode of action used by P. olsonii ML37 is via a local defence activation in wheat spikes, and that this fungus has potential as a novel biological alternative in wheat disease control.
AB - The fungal endophyte Penicillium olsonii ML37 is a biocontrol agent of Fusarium head blight in wheat (caused by Fusarium graminearum), which has shown a limited direct inhibition of fungal growth in vitro. We used RNA-seq and LC-MS/MS analyses to elucidate metabolic interactions of the three-way system Penicillium–wheat–Fusarium in greenhouse experiments. We demonstrated that P. olsonii ML37 colonises wheat spikes and transiently activates plant defence mechanisms, as pretreated spikes show a faster and stronger expression of the defence metabolism during the first 24 h after pathogen inoculation. This effect was transient and the expression of the same genes was lower in the pathogen-infected spikes than in those infected by P. olsonii alone. This response to the endophyte includes the transcriptional activation of several WRKY transcription factors. This early activation is associated with a reduction in FHB symptoms and significantly lower levels of the F. graminearum metabolites 15-acetyl-DON and culmorin. An increase in the Penicillium-associated metabolite asperphanamate confirms colonisation by the endophyte. Our results suggest that the mode of action used by P. olsonii ML37 is via a local defence activation in wheat spikes, and that this fungus has potential as a novel biological alternative in wheat disease control.
KW - asperphenamate
KW - biological control
KW - culmorin
KW - endophyte
KW - Fusarium head blight
KW - induced resistance
KW - mycotoxin
KW - Penicillium olsonii
KW - RNA-seq
KW - specialised metabolite
U2 - 10.3390/jof8040345
DO - 10.3390/jof8040345
M3 - Journal article
C2 - 35448576
AN - SCOPUS:85127985257
VL - 8
JO - Journal of Fungi
JF - Journal of Fungi
SN - 2309-608X
IS - 4
M1 - 345
ER -
ID: 305117483