Abstract
Leaf chemistry plays a central role in structuring phyllosphere microbiomes. Plant populations often evolve genetic differences in leaf chemistry across region due to both abiotic and biotic selection pressures, including insect herbivory. Plants in invasive populations may reassociate with native specialist insects, providing an ideal system to examine how herbivory-mediated changes in plant chemistry affect phyllosphere microbiome. Here, we conducted a common garden experiment using Ambrosia artemisiifolia populations differing in leaf chemistry and reassociation history with a specialist beetle—Ophraella communa. We found that plant populations with a longer reassociation history exhibited stronger herbivore resistance and supported phyllosphere communities with higher alpha diversity and more complex composition. These changes were associated with shifts in concentrations of plant metabolites and the expression levels of corresponding biosynthetic genes. The abundance of the fungal pathogens, Golovinomyces, decreased with increasing herbivore resistance, while Pestaliopsis showed the opposite trend. Although reassociation history was linked to population latitude, climatic and soil conditions at the sites of origin also contributed to between-population variation in leaf chemistry and phyllosphere fungal community composition. Our study suggests that genetic differences in leaf chemistry among plant populations can strongly affect herbivore resistance and phyllosphere fungal communities. The observed alignment of reassociation history, chemical traits and phyllosphere fungal communities suggests that herbivore-mediated selection may be a key driver of microbial community evolution in invasive plants.
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Claims 7
Claim · model-written summary
Populations with longer beetle reassociation history had stronger herbivore resistance.
- Taxon
- Ambrosia artemisiifolia
Ambrosia artemisiifoliae0 - Interactor
- Ophraella communa
Ophraella communae0herbivore - Outcome
- herbivore resistancee1
- Direction
- strongere1
- Comparator
- a longer reassociation historye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ambrosia artemisiifolia populations differing in leaf chemistry and reassociation history with a specialist beetle—Ophraella communa”
e1“plant populations with a longer reassociation history exhibited stronger herbivore resistance”
Claim · model-written summary
Populations with longer reassociation history had higher phyllosphere alpha diversity and more complex composition.
- Taxon
- Ambrosia artemisiifoliaAmbrosia artemisiifoliae0
- Outcome
- phyllosphere communities with higher alpha diversity and more complex compositione1
- Direction
- highere1
- Comparator
- a longer reassociation historye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ambrosia artemisiifolia populations”
e1“plant populations with a longer reassociation history exhibited stronger herbivore resistance and supported phyllosphere communities with higher alpha diversity and more complex composition”
Claim · model-written summary
Those community and resistance changes were associated with metabolite concentration shifts and biosynthetic gene expression.
- Taxon
- Ambrosia artemisiifoliaAmbrosia artemisiifoliae0
- Gene
- corresponding biosynthetic genese1
- Compound
- plant metabolitese1
- Outcome
- These changese1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ambrosia artemisiifolia populations”
e1“These changes were associated with shifts in concentrations of plant metabolites and the expression levels of corresponding biosynthetic genes”
Claim · model-written summary
Golovinomyces abundance decreased as herbivore resistance increased.
- Taxon
- Ambrosia artemisiifoliaAmbrosia artemisiifoliae0
- Interactor
- Golovinomyces
.jpg?width=60)
Golovinomycese1pathogen - Outcome
- abundance of the fungal pathogens, Golovinomycese1
- Direction
- decreasede1
- Comparator
- increasing herbivore resistancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Ambrosia artemisiifolia populations”
e1“The abundance of the fungal pathogens, Golovinomyces, decreased with increasing herbivore resistance”
Claim · model-written summary
Pestaliopsis abundance showed the opposite trend with herbivore resistance.
- Taxon
- Ambrosia artemisiifoliaAmbrosia artemisiifoliae0
- Interactor
- Pestaliopsise1pathogen
- Outcome
- Pestaliopsise1
- Comparator
- increasing herbivore resistancee2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ambrosia artemisiifolia populations”
e1“while Pestaliopsis showed the opposite trend”
e2“decreased with increasing herbivore resistance”
Claim · model-written summary
Reassociation history was linked to population latitude.
- Taxon
- Ambrosia artemisiifoliaAmbrosia artemisiifoliae0
- Outcome
- reassociation historye1
- Setting
- population latitudee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ambrosia artemisiifolia populations”
e1“reassociation history was linked to population latitude”
Claim · model-written summary
Climate and soil conditions at origins contributed to population differences in leaf chemistry and fungal community composition.
- Taxon
- Ambrosia artemisiifoliaAmbrosia artemisiifoliae0
- Outcome
- between-population variation in leaf chemistry and phyllosphere fungal community compositione1
- Setting
- sites of origine1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ambrosia artemisiifolia populations”
e1“climatic and soil conditions at the sites of origin also contributed to between-population variation in leaf chemistry and phyllosphere fungal community composition”