Abstract
Although no specific role has been demonstrated for ethylene during Arbuscular Mycorrhizal (AM) symbiosis, recent results suggest its participation in the regulation of the AM. Analysis of arbuscular mycorrhizal colonization in the abscisic acid (ABA)-deficient tomato sitiens mutant has shown that ABA deficiency induced ethylene production. It has also been suggested that one of the mechanisms used by ABA to determine susceptibility to fungal infection is negative modulation of the ethylene pathway. In this study, we describe the pattern of mycorrhization in mutant plants with altered ethylene biosynthesis and/or perception pathways. Epinastic (epi) plants with increased ethylene response were unaffected in terms of mycorrhizal frequency, although this mutation had a considerable negative impact on the intensity of mycorrhizal root colonization. The negative impact of the mutation in epi plants on the intensity of mycorrhizal root colonization was associated with a transitory increase in the transcript level of the LeETR6 ethylene receptor gene. On the other hand, ripenenig-inhibitor (rin) tomato mutant plants were positively affected in relation to all the mycorrhizal colonization parameters measured, suggesting that, at least in tomato plants, the regulation of AM formation is mediated by the RIN pathway.
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Claims 5
Claim · model-written summary
The epi tomato mutant had unchanged mycorrhizal frequency.
- Taxon
- tomato
Solanum lycopersicumt0 - Material
- Epinastic (epi)e0
- Outcome
- mycorrhizal frequencye0
- Direction
- unaffectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Epinastic (epi) plants with increased ethylene response were unaffected in terms of mycorrhizal frequency”
t0“tomato”
Claim · model-written summary
The epi mutation reduced intensity of mycorrhizal root colonization.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- intensity of mycorrhizal root colonizatione0
- Direction
- negative impacte0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this mutation had a considerable negative impact on the intensity of mycorrhizal root colonization.”
t0“tomato”
Claim · model-written summary
Reduced colonization intensity in epi plants was associated with transiently elevated LeETR6 transcript.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- epie0
- Gene
- LeETR6e0
- Outcome
- intensity of mycorrhizal root colonizatione0
- Direction
- negative impacte0
- Qualifier
- transitory increase in the transcript levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The negative impact of the mutation in epi plants on the intensity of mycorrhizal root colonization was associated with a transitory increase in the transcript level of the LeETR6 ethylene receptor gene.”
t0“tomato”
Claim · model-written summary
The rin tomato mutant improved all measured mycorrhizal colonization parameters.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- ripenenig-inhibitor (rin)e0
- Outcome
- mycorrhizal colonization parameterse0
- Direction
- positively affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ripenenig-inhibitor (rin) tomato mutant plants were positively affected in relation to all the mycorrhizal colonization parameters measured”
Claim · model-written summary
The authors suggest RIN pathway mediation of AM formation.
- Taxon
- tomatoSolanum lycopersicumt0
- Gene
- RINe0
- Outcome
- AM formatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the regulation of AM formation is mediated by the RIN pathway.”
t0“tomato”