Abstract
Mungbean [Vigna radiata (L.) Wilczek], an important leguminous crop, is grown on more than six million hectares worldwide. However, mungbean is very susceptible to the common leaf-feeding cutworm (Spodoptera litura), and its defence mechanism against S. litura is not fully understood. By integrating an 'omic' approach and comparing the results between the resistant wild accession (CQ3112) and susceptible cultivar (Crystal) after S. litura attacks, this study identified the key defensive regulatory genes and bioactive metabolites involved in resistance to S. litura. The transcriptomic results demonstrated that VrMYC2, VrAOC, VrGH3 and VrPPO are involved in defence responses associated with jasmonic acid (JA) signalling, and VrUGT84A24, VrIOMT and VrEBOS, involved in the terpenoid and flavonoid biosynthesis, are up-regulated in responses to S. litura attacks. The metabolomic results further confirmed that JA, glucosylated kaempferol and (E)-β-ocimene are accumulated in CQ3112 accession, supporting defence response to S. litura infestation. Moreover, feeding S. litura larvae with kaempferol-7-O-glucoside (K7G), a non-volatile metabolite identified in this study, showed S. litura growth and mortality reductions. Taken together, this study provides solid evidence that K7G functions as an insecticidal compound to control S. litura attacks. Also, the genes involved in defence against S. litura could provide genetic information for the improvement of mungbean breeding programmes.
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Claims 5
Claim · model-written summary
JA-related defensive regulatory genes were implicated after S. litura attacks.
- Taxon
- Mungbean
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Vigna radiatat0 - Gene
- VrMYC2, VrAOC, VrGH3 and VrPPOe0
- Compound
- jasmonic acid (JA)e0
- Outcome
- defence responsese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“VrMYC2, VrAOC, VrGH3 and VrPPO are involved in defence responses associated with jasmonic acid (JA) signalling”
t0“Wild Mungbean”
Claim · model-written summary
Terpenoid and flavonoid biosynthesis genes were up-regulated by S. litura attack.
- Taxon
- MungbeanVigna radiatat0
- Interactor
- S. litura
Spodoptera liturae0pest - Outcome
- VrUGT84A24, VrIOMT and VrEBOSe0
- Direction
- up-regulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“VrUGT84A24, VrIOMT and VrEBOS, involved in the terpenoid and flavonoid biosynthesis, are up-regulated in responses to S. litura attacks”
t0“Wild Mungbean”
Claim · model-written summary
JA, glucosylated kaempferol and (E)-β-ocimene accumulated in resistant CQ3112.
- Taxon
- MungbeanVigna radiatat0
- Material
- CQ3112e0
- Outcome
- JA, glucosylated kaempferol and (E)-β-ocimenee0
- Direction
- accumulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“JA, glucosylated kaempferol and (E)-β-ocimene are accumulated in CQ3112 accession”
t0“Wild Mungbean”
Claim · model-written summary
Feeding larvae K7G reduced their growth.
- Taxon
- MungbeanVigna radiatat0
- Treatment
- feeding S. litura larvae with kaempferol-7-O-glucoside (K7G)e0
- Interactor
- S. lituraSpodoptera liturae0pest
- Outcome
- S. litura growthe0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“feeding S. litura larvae with kaempferol-7-O-glucoside (K7G), a non-volatile metabolite identified in this study, showed S. litura growth and mortality reductions”
t0“Wild Mungbean”
Claim · model-written summary
Feeding larvae K7G reduced their mortality.
- Taxon
- MungbeanVigna radiatat0
- Treatment
- feeding S. litura larvae with kaempferol-7-O-glucoside (K7G)e0
- Interactor
- S. lituraSpodoptera liturae0pest
- Outcome
- mortalitye0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“feeding S. litura larvae with kaempferol-7-O-glucoside (K7G), a non-volatile metabolite identified in this study, showed S. litura growth and mortality reductions”
t0“Wild Mungbean”
The same questions in other papers
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- negative
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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.