Abstract
Abstract Allelochemicals released by invasive plants contribute to the successful invasion of new habitats. However, the relationship between allelopathic effects and competitive ability of invasive plants has not been characterized. We quantified the neighbor effects of Wedelia trilobata (family: Asteraceae) and the allelopathic effects of its leaf litter on two Asteraceae competitor species (invasive Eupatorium catarium and non‐invasive Lactuca sativa ) and on its own ramet growth. The seed germination rate and seedling biomass of the two competitor species decreased following treatment with W. trilobata leaf extracts. When co‐cultured with W. trilobata , the total biomass of the two competitor species significantly decreased regardless of whether leaf extracts were present. Under low plant density co‐culture conditions, W. trilobata leaf extracts enhanced the inhibitory effects on E. catarium . In contrast, W. trilobata leaf extracts promoted the growth of W. trilobata adventitious roots, resulting in increased competitive ability. Therefore, W. trilobata growth was promoted by its own allelochemicals in leaf extracts, whereas the growth of the invasive and non‐invasive competitors was inhibited by the same chemicals. These responses facilitated the invasion by W. trilobata . Our study demonstrates that leaf litter of invasive plants may inhibit the growth of neighboring species to enhance the competitive ability of the invasive plants during the early stages of invasion.
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Claims 4
Claim · model-written summary
Wedelia extracts reduced Eupatorium germination and seedling biomass.
- Taxon
- W. trilobata
.jpg?width=60)
Sphagneticola trilobatae0 - Treatment
- W. trilobata leaf extractse0
- Outcome
- seed germination rate and seedling biomasse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The seed germination rate and seedling biomass of the two competitor species decreased following treatment with W. trilobata leaf extracts”
Claim · model-written summary
Co-culture with Wedelia significantly reduced competitor biomass.
- Taxon
- W. trilobataSphagneticola trilobatae0
- Treatment
- co‐cultured with W. trilobatae0
- Outcome
- total biomass of the two competitor speciese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When co‐cultured with W. trilobata , the total biomass of the two competitor species significantly decreased regardless of whether leaf extracts were present”
Claim · model-written summary
Under low density, extracts enhanced inhibition of Eupatorium.
- Taxon
- W. trilobataSphagneticola trilobatae0
- Treatment
- W. trilobata leaf extractse0
- Interactor
- E. catarium
_R.M.King_%26_H.Rob._(4798927323).jpg?width=60)
Praxelis clematideae0weed - Outcome
- inhibitory effects on E. catariume0
- Direction
- enhancede0
- Qualifier
- low plant density co‐culture conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_R.M.King_%26_H.Rob._(4798927323).jpg?width=500)
Verbatim
e0“Under low plant density co‐culture conditions, W. trilobata leaf extracts enhanced the inhibitory effects on E. catarium”
Claim · model-written summary
Extracts promoted Wedelia adventitious-root growth.
- Taxon
- W. trilobataSphagneticola trilobatae0
- Organ / stage
- adventitious rootse0
- Treatment
- W. trilobata leaf extractse0
- Outcome
- growth of W. trilobata adventitious rootse0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“W. trilobata leaf extracts promoted the growth of W. trilobata adventitious roots”
The same questions in other papers
botanical · growth · Sphagneticola trilobataPositive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- negative
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1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.