Abstract
Abstract The flavone, tricin (5,7,4′‐trihydroxy‐3′,5′‐dimethoxyflavone), is a valuable secondary metabolite that is common in gramineous plants, including cultivated rice ( Oryza sativa ). It can defend the rice plant against infestation by the brown planthopper ( BPH ), Nilaparvata lugens Stål, one of the most important pests of rice. This study evaluated the tricin concentration in infested and non‐infested rice plants. The results of the liquid chromatography coupled to tandem mass spectrometry ( LC – MS / MS ) quantitative analysis showed that the tricin concentration in rice leaves was significantly higher than in the stems and roots. The mass concentration of tricin in the leaves at the leaf stage was significantly higher than at the tiller and booting stages. The relationship between rice variety, BPH resistance and tricin concentration was investigated. There was a significant negative correlation between tricin concentration and the injury severity scores for rice varieties. Moreover, BPH infestation caused variations in tricin concentration among rice plants. High BPH infestation levels can significantly reduce the tricin concentration in rice plants. However, there is no significant effect of the length of infestation times on tricin concentrations in rice leaves. These results suggest that there may be an elicitor in BPH saliva, which is injected into rice plants during BPH infestation and triggers the tricin metabolic system. Future studies need to identify the elicitor and clarify the mechanism underlying tricin reduction in infested rice plants.
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Claims 7
Claim · model-written summary
the tricin concentration in rice leaves was significantly higher than in the stems and roots
- Taxon
- rice
Oryza sativae0 - Organ / stage
- leavese0
- Outcome
- tricin concentratione0
- Direction
- highere0
- Comparator
- stems and rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the tricin concentration in rice leaves was significantly higher than in the stems and roots”
Claim · model-written summary
The mass concentration of tricin in the leaves at the leaf stage was significantly higher than at the tiller and booting stages
- Taxon
- riceOryza sativat0
- Organ / stage
- leaf stagee0
- Outcome
- mass concentration of tricine0
- Direction
- highere0
- Comparator
- tiller and booting stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mass concentration of tricin in the leaves at the leaf stage was significantly higher than at the tiller and booting stages”
t0“rice plants”
Claim · model-written summary
There was a significant negative correlation between tricin concentration and the injury severity scores for rice varieties
- Taxon
- riceOryza sativae0
- Interactor
- brown planthopper
Nilaparvata lugenst0pest - Compound
- tricine0
- Outcome
- injury severity scorese0
- Direction
- negative correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a significant negative correlation between tricin concentration and the injury severity scores for rice varieties”
t0“brown planthopper”
Claim · model-written summary
BPH infestation caused variations in tricin concentration among rice plants
- Taxon
- riceOryza sativae0
- Treatment
- BPH infestatione0
- Interactor
- BPHe0pest
- Outcome
- tricin concentratione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BPH infestation caused variations in tricin concentration among rice plants”
Claim · model-written summary
High BPH infestation levels can significantly reduce the tricin concentration in rice plants
- Taxon
- riceOryza sativae0
- Treatment
- High BPH infestation levelse0
- Interactor
- BPHe0pest
- Outcome
- tricin concentratione0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High BPH infestation levels can significantly reduce the tricin concentration in rice plants”
Claim · model-written summary
there is no significant effect of the length of infestation times on tricin concentrations in rice leaves
- Taxon
- riceOryza sativae0
- Organ / stage
- leavese0
- Treatment
- length of infestation timese0
- Interactor
- brown planthopperNilaparvata lugenst0pest
- Outcome
- tricin concentrationse0
- Direction
- no significant effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there is no significant effect of the length of infestation times on tricin concentrations in rice leaves”
t0“brown planthopper”
Claim · model-written summary
there may be an elicitor in BPH saliva, which is injected into rice plants during BPH infestation and triggers the tricin metabolic system
- Taxon
- riceOryza sativae0
- Interactor
- BPHe0pest
- Outcome
- tricin metabolic systeme0
- Qualifier
- elicitor in BPH salivae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there may be an elicitor in BPH saliva, which is injected into rice plants during BPH infestation and triggers the tricin metabolic system”
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