Abstract
In a recent study of N-acylphosphatidylethanolamine (NAPE) metabolism in elicitor-treated tobacco (Nicotiana tabacum L.) cells, we identified a rapid release and accumulation of medium-chain N-acylethanolamines (NAEs) (e.g. N-myristoylethanolamine or NAE 14:0) and a compensatory decrease in cellular NAPE (K.D. Chapman, S. Tripathy, B. Venables, A.D. Desouza [1998] Plant Physiol 116: 1163-1168). In the present study, we extend this observation and report a 10- to 50-fold increase in NAE 14:0 content in leaves of tobacco (cv Xanthi) plants treated with xylanase or cryptogein elicitors. Exogenously supplied synthetic NAE species affected characteristic elicitor-induced and short- and long-term defense responses in cell suspensions of tobacco and long-term defense responses in leaves of intact tobacco plants. In general, synthetic NAEs inhibited elicitor-induced medium alkalinization by tobacco cells in a time- and concentration-dependent manner. Exogenous NAE 14:0 induced expression of phenylalanine ammonia lyase in a manner similar to fungal elicitors in both cell suspensions and leaves of tobacco. NAE 14:0, but not myristic acid, activated phenylalanine ammonia lyase expression at submicromolar concentrations, well within the range of NAE 14:0 levels measured in elicitor-treated plants. Collectively, these results suggest that NAPE metabolism, specifically, the accumulation of NAE 14:0, are part of a signal transduction pathway that modulates cellular defense responses following the perception of fungal elicitors.
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Claims 5
Claim · model-written summary
Xylanase treatment increased leaf NAE 14:0 content 10- to 50-fold.
- Taxon
- tobacco
Nicotiana tabacume0 - Material
- Xanthie0
- Organ / stage
- leavese0
- Treatment
- xylanasee0
- Outcome
- NAE 14:0 contente0
- Direction
- increasee0
- Value
- 10- to 50-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10- to 50-fold increase in NAE 14:0 content in leaves of tobacco (cv Xanthi) plants treated with xylanase or cryptogein elicitors”
Claim · model-written summary
Cryptogein treatment increased leaf NAE 14:0 content 10- to 50-fold.
- Taxon
- tobaccoNicotiana tabacume0
- Material
- Xanthie0
- Organ / stage
- leavese0
- Treatment
- cryptogein elicitorse0
- Outcome
- NAE 14:0 contente0
- Direction
- increasee0
- Value
- 10- to 50-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10- to 50-fold increase in NAE 14:0 content in leaves of tobacco (cv Xanthi) plants treated with xylanase or cryptogein elicitors”
Claim · model-written summary
Synthetic NAEs inhibited elicitor-induced medium alkalinization in a time- and concentration-dependent manner.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- synthetic NAEse0
- Outcome
- elicitor-induced medium alkalinizatione0
- Direction
- inhibitede0
- Qualifier
- time- and concentration-dependent mannere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“synthetic NAEs inhibited elicitor-induced medium alkalinization by tobacco cells in a time- and concentration-dependent manner”
Claim · model-written summary
Exogenous NAE 14:0 induced phenylalanine ammonia lyase expression in tobacco cells and leaves.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Exogenous NAE 14:0e0
- Gene
- phenylalanine ammonia lyasee0
- Outcome
- expression of phenylalanine ammonia lyasee0
- Direction
- inducede0
- Comparator
- fungal elicitorse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous NAE 14:0 induced expression of phenylalanine ammonia lyase in a manner similar to fungal elicitors in both cell suspensions and leaves of tobacco”
Claim · model-written summary
NAE 14:0 activated phenylalanine ammonia lyase expression at submicromolar concentrations.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- NAE 14:0e0
- Gene
- phenylalanine ammonia lyasee0
- Outcome
- phenylalanine ammonia lyase expressione0
- Direction
- activatede0
- Qualifier
- submicromolar concentrationse0
- Comparator
- myristic acide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NAE 14:0, but not myristic acid, activated phenylalanine ammonia lyase expression at submicromolar concentrations”
e1“leaves of tobacco (cv Xanthi) plants treated with xylanase or cryptogein elicitors”
The same questions in other papers
resistance inducer · molecular: metabolites · Nicotiana tabacum (tobacco)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- negative
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2 papers more in this group
See all 6 papers →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.