Abstract
Abstract Chitosan derivatives classed into three groups according to their molecular size were examined for the relationships between degree of N -acetylation and phytoalexin (+)-pisatin-inducing activity in pea epicotyl assay. Partially N-deacetylated chitin with degree of N-acetylation 56% (DAC 56%) was the most potent inducer of (+)-pisatin among sparingly water-soluble polysaccharides including chitosan (degree of N -acetylation 0%), DAC 32%, and chitin. Among the intermediate-sized molecules obtained from degradation of the chitosan and the DACs by NaNO 2 , the chitosan fragment was the most powerful elicitor for (+)-pisatin induction. The NaNO 2 -degraded DAC 56% exhibited a com parable activity to the NaNO 2 -degrad-ed chitosan at low concentrations. The NaNO 2 -degraded fragments as well as the native polymer induced a relatively high amount of (+)-pisatin, while the acetone precipitate of chitosan oligomers from the HCl-catalyzed hydrolysate and their partially N-acetylated derivatives exhibited a moderate (+)-pisatin-inducing activity. These findings suggest the possibility that partially N-deacetylated chitin fragments could be one of the most promising elicitors in the pea system.
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Claims 5
Claim · model-written summary
DAC 56% was the strongest inducer of pisatin among the sparingly water-soluble polysaccharides.
- Taxon
- pea
Lathyrus oleraceust0 - Treatment
- Partially N-deacetylated chitin with degree of N-acetylation 56% (DAC 56%)e0
- Outcome
- (+)-pisatine0
- Direction
- most potente0
- Comparator
- chitosan (degree of N -acetylation 0%), DAC 32%, and chitine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Partially N-deacetylated chitin with degree of N-acetylation 56% (DAC 56%) was the most potent inducer of (+)-pisatin among sparingly water-soluble polysaccharides including chitosan (degree of N -acetylation 0%), DAC 32%, and chitin.”
t0“Pea”
Claim · model-written summary
The chitosan fragment was the strongest intermediate-sized pisatin elicitor.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- chitosan fragmente0
- Outcome
- (+)-pisatine0
- Direction
- most powerfule0
- Comparator
- the DACse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the intermediate-sized molecules obtained from degradation of the chitosan and the DACs by NaNO 2 , the chitosan fragment was the most powerful elicitor for (+)-pisatin induction.”
t0“Pea”
Claim · model-written summary
Degraded DAC 56% had activity comparable to degraded chitosan at low concentrations.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- NaNO 2 -degraded DAC 56%e0
- Outcome
- activitye0
- Direction
- com parablee0
- Qualifier
- at low concentrationse0
- Comparator
- NaNO 2 -degrad-ed chitosane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NaNO 2 -degraded DAC 56% exhibited a com parable activity to the NaNO 2 -degrad-ed chitosan at low concentrations.”
t0“Pea”
Claim · model-written summary
Degraded fragments and native polymer induced relatively high pisatin amounts.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- NaNO 2 -degraded fragments as well as the native polymere0
- Outcome
- relatively high amount of (+)-pisatine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NaNO 2 -degraded fragments as well as the native polymer induced a relatively high amount of (+)-pisatin, while the acetone precipitate of chitosan oligomers from the HCl-catalyzed hydrolysate and their partially N-acetylated derivatives exhibited a moderate (+)-pisatin-inducing activity.”
t0“Pea”
Claim · model-written summary
The acetone precipitate and partially N-acetylated derivatives had moderate pisatin-inducing activity.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- acetone precipitate of chitosan oligomers from the HCl-catalyzed hydrolysate and their partially N-acetylated derivativese0
- Outcome
- moderate (+)-pisatin-inducing activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NaNO 2 -degraded fragments as well as the native polymer induced a relatively high amount of (+)-pisatin, while the acetone precipitate of chitosan oligomers from the HCl-catalyzed hydrolysate and their partially N-acetylated derivatives exhibited a moderate (+)-pisatin-inducing activity.”
t0“Pea”
The same questions in other papers
chitosan · molecular: metabolites · Lathyrus oleraceus (pea)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- positive
- no effect
1 paper more in this group
See all 5 papers →resistance inducer · molecular: metabolites · Lathyrus oleraceus (pea)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.