Abstract
We recently found that the beneficial fungus Trichoderma harzianum T-78 primes tomato plants for salicylic acid (SA)- and jasmonic acid (JA)-regulated defenses, resulting in enhanced resistance against the root knot nematode Meloidogyne incognita. By using SA- and JA-impaired mutant lines and exogenous hormonal application, here we investigated whether the SA- and JA-pathways also have a role in T-78 root colonization of Arabidopsis thaliana. Endophytic colonization by T-78 was faster in the SA-impaired mutant sid2 than in the wild type. Moreover, elicitation of SA-dependent defenses by SA application reduced T-78 colonization, indicating that the SA-pathway affects T-78 endophytism. In contrast, elicitation of the JA-pathway, which antagonized SA-dependent defenses, resulted in enhanced endophytic colonization by T-78. These findings are in line with our previous observation that SA-dependent defenses are repressed by T-78, which likely aids colonization by the endophytic fungus.
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Claims 4
Claim · model-written summary
T-78 colonized SA-impaired sid2 roots faster than wild-type roots.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Material
- sid2e0
- Interactor
- T-78e0symbiont
- Outcome
- Endophytic colonization by T-78e0
- Direction
- fastere0
- Comparator
- wild typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Endophytic colonization by T-78 was faster in the SA-impaired mutant sid2 than in the wild type”
t0“root colonization of Arabidopsis thaliana.”
Claim · model-written summary
Applying SA to elicit defenses reduced T-78 colonization.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- SA applicatione0
- Interactor
- T-78e0symbiont
- Outcome
- T-78 colonizatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elicitation of SA-dependent defenses by SA application reduced T-78 colonization”
t0“root colonization of Arabidopsis thaliana.”
Claim · model-written summary
Eliciting the JA pathway enhanced T-78 endophytic colonization.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- elicitation of the JA-pathwaye0
- Interactor
- T-78e0symbiont
- Outcome
- endophytic colonization by T-78e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elicitation of the JA-pathway, which antagonized SA-dependent defenses, resulted in enhanced endophytic colonization by T-78”
t0“root colonization of Arabidopsis thaliana.”
Claim · model-written summary
The authors infer that T-78 repression of SA-dependent defenses likely aids its colonization.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Interactor
- T-78e0symbiont
- Outcome
- colonization by the endophytic funguse0
- Qualifier
- SA-dependent defenses are repressed by T-78e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA-dependent defenses are repressed by T-78, which likely aids colonization by the endophytic fungus”
t0“root colonization of Arabidopsis thaliana.”