Abstract
Induction of defenses is one of the most widely accepted eco-friendly approaches for management of pests and diseases. Seeds are receptive to resistance-inducing chemicals and could offer broad-spectrum protection at the early stages of development. However, seed treatment with elicitors has previously been shown to differentially influence induced defense responses among cultivars and thus, could hamper commercial exploitation. In this context, the objective of the present study was to evaluate the genotype-dependent ability of jasmonic acid (JA) to induce resistance against western flower thrips (WFT) at the seed stage. We examined the variation in inducibility of resistance in eight commercial tomato cultivars. Causal factors accounting for discrepancies in JA-induced responses at the seed stage were phenotypically and biochemically evaluated. Seed receptivity to exogenous JA appeared to be cultivar dependent. Thrips associated silver damage was only reduced in JA seed-treated plants of cultivar Carousel. Enhancement of resistance, was not associated with activation of defense-related traits such as polyphenol oxidase activity (PPO), trichomes or volatiles. Sulfuric acid scarification, prior to JA seed incubation, significantly augmented the embryonic responsiveness to JA in cv. Moneymaker without an adverse effect on growth. Hence, these results support the hypothesis that seed coat permeability is a key factor for successfully inducing JA mediated thrips defenses. The outcome of our study is of translational value as it creates opportunities for the seed industry to perform pre-treatments on non-responsive cultivars as well as for tomato breeding programs to select for genetic traits that affect seed permeability.
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Claims 6
Claim · model-written summary
Thrips-associated silver damage was reduced only in JA seed-treated plants of tomato cultivar Carousel.
- Taxon
- Tomato
Solanum lycopersicumt0 - Material
- Carousele0
- Treatment
- JA seed-treatede0
- Outcome
- Thrips associated silver damagee0
- Direction
- reducede0
ThripsNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Thrips associated silver damage was only reduced in JA seed-treated plants of cultivar Carousel”
Claim · model-written summary
Enhanced resistance was not associated with activation of defense-related traits such as polyphenol oxidase activity, trichomes or volatiles.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- defense-related traits such as polyphenol oxidase activity (PPO), trichomes or volatilese0
- Outcome
- Enhancement of resistancee0
- Direction
- no_changeinferrede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Enhancement of resistance, was not associated with activation of defense-related traits such as polyphenol oxidase activity (PPO), trichomes or volatiles”
Claim · model-written summary
Sulfuric acid scarification before JA seed incubation significantly augmented embryonic responsiveness to JA in cv. Moneymaker.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- Moneymakere0
- Treatment
- Sulfuric acid scarificatione0
- Outcome
- embryonic responsiveness to JAe0
- Direction
- augmentede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Sulfuric acid scarification, prior to JA seed incubation, significantly augmented the embryonic responsiveness to JA in cv. Moneymaker”
Claim · model-written summary
Sulfuric acid scarification had no adverse effect on growth.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Sulfuric acid scarificatione0
- Outcome
- growthe1
- Direction
- without an adverse effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Sulfuric acid scarification”
e1“without an adverse effect on growth”
Claim · model-written summary
Seed receptivity to exogenous JA appeared to depend on cultivar.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- Seed receptivity to exogenous JAe0
- Qualifier
- cultivar dependente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Seed receptivity to exogenous JA appeared to be cultivar dependent”
Claim · model-written summary
The authors conclude that seed coat permeability is a key factor for successfully inducing JA-mediated thrips defenses.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- JA mediated thrips defensese0
- Qualifier
- seed coat permeability is a key factore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“seed coat permeability is a key factor for successfully inducing JA mediated thrips defenses”
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