Abstract
The analysis of SA accumulation in roots of plant symbiotic mutants revealed two independent phenomena associated with the inability of either the plant or the microsymbiont to form a compatible symbiosis. SA accumulation in roots of the wild type and symbiosis-resistant P2 (Nod−, Myc−) Pisum sativum genotypes was induced upon interaction with Glomus mosseae. The amplitude of this accumulation was higher in P2 plants and increased with time, an effect that was not observed in roots of the wild-type P. sativum genotype. Likewise, Rhizobium leguminosarum wild type or a mutant blocked in Nod factor biosynthesis induced SA accumulation in P2, whereas SA accumulation in roots of the wild-type plant was dependent on the inability of the bacterium to produce Nod factors. These results suggest that the sym30 gene, which is mutated in P2 plants, could be implicated in a common pathway that leads to the suppression of an SA-dependent defence mechanism in legume plants against Rhizobium and endomycorrhizal fungi, thus allowing establishment of symbiosis.
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Claims 7
Claim · model-written summary
Glomus mosseae induced SA accumulation in wild type and P2 pea roots.
- Taxon
- Pisum sativum
Lathyrus oleraceuse0 - Material
- wild type and symbiosis-resistant P2e0
- Organ / stage
- rootse0
- Interactor
- Glomus mosseae
Funneliformis mosseaee0symbiont - Outcome
- SA accumulatione0
- Direction
- inducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA accumulation in roots of the wild type and symbiosis-resistant P2 (Nod−, Myc−) Pisum sativum genotypes was induced upon interaction with Glomus mosseae”
Claim · model-written summary
The induced SA accumulation was greater in P2 plants and rose with time, unlike wild type.
- Taxon
- P. sativumLathyrus oleraceuse0
- Material
- P2 plantse0
- Outcome
- amplitude of this accumulatione0
- Direction
- highere0
- Comparator
- wild-type P. sativum genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amplitude of this accumulation was higher in P2 plants and increased with time, an effect that was not observed in roots of the wild-type P. sativum genotype”
Claim · model-written summary
SA accumulation in P2 plants increased with time.
- Taxon
- P. sativumLathyrus oleraceuse0
- Material
- P2 plantse0
- Outcome
- this accumulatione0
- Direction
- increasede0
- Qualifier
- with timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amplitude of this accumulation was higher in P2 plants and increased with time, an effect that was not observed in roots of the wild-type P. sativum genotype”
Claim · model-written summary
Rhizobium leguminosarum wild type induced SA accumulation in P2 pea roots.
- Taxon
- peaLathyrus oleraceust0
- Material
- P2e0
- Interactor
- Rhizobium leguminosarum wild type
Rhizobium leguminosarume0symbiont - Outcome
- SA accumulatione0
- Direction
- inducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhizobium leguminosarum wild type or a mutant blocked in Nod factor biosynthesis induced SA accumulation in P2”
t0“pea roots”
Claim · model-written summary
A Rhizobium mutant blocked in Nod factor biosynthesis induced SA accumulation in P2 pea.
- Taxon
- peaLathyrus oleraceust0
- Material
- P2e0
- Interactor
- a mutant blocked in Nod factor biosynthesise0symbiont
- Outcome
- SA accumulatione0
- Direction
- inducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhizobium leguminosarum wild type or a mutant blocked in Nod factor biosynthesis induced SA accumulation in P2”
t0“pea roots”
Claim · model-written summary
Wild type pea root SA accumulation depended on bacterial inability to make Nod factors.
- Taxon
- peaLathyrus oleraceust0
- Organ / stage
- rootse0
- Outcome
- SA accumulatione0
- Qualifier
- inability of the bacterium to produce Nod factorse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA accumulation in roots of the wild-type plant was dependent on the inability of the bacterium to produce Nod factors”
t0“pea roots”
Claim · model-written summary
The authors suggest sym30 suppresses SA dependent defence against Rhizobium and endomycorrhizal fungi, allowing symbiosis.
- Taxon
- legume plantse0
- Second interactor
- endomycorrhizal fungie0symbiont
- Gene
- sym30 genee0
- Outcome
- establishment of symbiosise0
- Qualifier
- suppression of an SA-dependent defence mechanisme0
RhizobiumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the sym30 gene, which is mutated in P2 plants, could be implicated in a common pathway that leads to the suppression of an SA-dependent defence mechanism in legume plants against Rhizobium and endomycorrhizal fungi, thus allowing establishment of symbiosis”