Abstract
Following nematode infestation, leaf-localized responses are vital not only as early infection signs but also as an indication of actions required to preserve crop productivity. In this context, the leaf-level physiological responses of cantaloupe seedlings were evaluated after 40 consecutive days of cultivation under different Meloidogyne javanica juveniles (J2s) inoculation regimes (0, 100, and 850 J2s plant−1). Leaf growth parameters and photosynthetic pigments (chlorophyll, carotenoids) content were not affected by J2s infestation, while foliar Potassium concentration significantly declined. The RuBIsCo activase gene expression was negatively associated with the J2s inoculation level. Total flavonoids, total phenolics, lipid peroxidation indexes, phenylalanine ammonia-lyase activity, as well as, ascorbate peroxidase gene transcription, were higher in the inoculated plants (regardless of the J2s inoculant level). Taken together, present data indicate that J2s infestation impacts primarily the Potassium levels in leaves. Additionally, a substantial stimulation of the plant antioxidant machinery (independent of the nematode infestation intensity) is triggered. Finally, it was established that the transcriptional regulation of the RuBIsCo activase 1 gene under biotic stress has the capacity to be employed as a potential stress indicator marker.
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Claims 7
Claim · model-written summary
Leaf growth was unaffected by J2 infestation.
- Taxon
- Cucumis melo
.jpg?width=60)
Cucumis melot0 - Treatment
- J2s infestatione0
- Interactor
- J2se0pest
- Outcome
- Leaf growth parameterse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Leaf growth parameters and photosynthetic pigments (chlorophyll, carotenoids) content were not affected by J2s infestation”
t0“Cucumis melo seedlings”
Claim · model-written summary
Photosynthetic pigment content was unaffected by J2 infestation.
- Taxon
- Cucumis meloCucumis melot0
- Treatment
- J2s infestatione0
- Interactor
- J2se0pest
- Outcome
- photosynthetic pigments (chlorophyll, carotenoids) contente0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf growth parameters and photosynthetic pigments (chlorophyll, carotenoids) content were not affected by J2s infestation”
t0“Cucumis melo seedlings”
Claim · model-written summary
Foliar potassium declined significantly after infestation.
- Taxon
- Cucumis meloCucumis melot0
- Treatment
- Meloidogyne javanica infestationt0
- Interactor
- Meloidogyne javanicaMeloidogyne javanicat0pest
- Outcome
- foliar Potassium concentratione0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while foliar Potassium concentration significantly declined”
t0“Meloidogyne javanica infestation: A case study on Cucumis melo seedlings”
Claim · model-written summary
RuBIsCo activase expression was negatively associated with inoculation level.
- Taxon
- Cucumis meloCucumis melot0
- Treatment
- J2s inoculation levele0
- Interactor
- J2se0pest
- Gene
- RuBIsCo activasee0
- Outcome
- RuBIsCo activase gene expressione0
- Direction
- negativelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The RuBIsCo activase gene expression was negatively associated with the J2s inoculation level”
t0“Cucumis melo seedlings”
Claim · model-written summary
Flavonoids, phenolics and lipid peroxidation indexes were higher in inoculated plants.
- Taxon
- Cucumis meloCucumis melot0
- Treatment
- inoculated plantse0
- Interactor
- J2se0pest
- Outcome
- Total flavonoids, total phenolics, lipid peroxidation indexese0
- Direction
- highere0
- Qualifier
- regardless of the J2s inoculant levele0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total flavonoids, total phenolics, lipid peroxidation indexes, phenylalanine ammonia-lyase activity, as well as, ascorbate peroxidase gene transcription, were higher in the inoculated plants (regardless of the J2s inoculant level)”
t0“Cucumis melo seedlings”
Claim · model-written summary
Phenylalanine ammonia-lyase activity and ascorbate peroxidase transcription were higher in inoculated plants.
- Taxon
- Cucumis meloCucumis melot0
- Treatment
- inoculated plantse0
- Interactor
- J2se0pest
- Gene
- ascorbate peroxidasee0
- Outcome
- phenylalanine ammonia-lyase activity, as well as, ascorbate peroxidase gene transcriptione0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total flavonoids, total phenolics, lipid peroxidation indexes, phenylalanine ammonia-lyase activity, as well as, ascorbate peroxidase gene transcription, were higher in the inoculated plants (regardless of the J2s inoculant level)”
t0“Cucumis melo seedlings”
Claim · model-written summary
RuBIsCo activase 1 transcription may serve as a stress marker.
- Taxon
- Cucumis meloCucumis melot0
- Gene
- RuBIsCo activase 1e0
- Outcome
- potential stress indicator markere0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the transcriptional regulation of the RuBIsCo activase 1 gene under biotic stress has the capacity to be employed as a potential stress indicator marker”
t0“Cucumis melo seedlings”
The same questions in other papers
infection · physiology: photosynthesis · Cucumis melo (muskmelon)Results agree
1 paper in the same direction as this paper
- negative
infection · nutrient: content · Cucumis melo (muskmelon)Results agree
1 paper in the same direction as this paper
- no effect
inoculation · molecular: expression · Cucumis melo (muskmelon)Results agree
2 papers in the same direction as this paper
- positive
- positive
inoculation · physiology: oxidative · Cucumis melo (muskmelon)Results agree
2 papers in the same direction as this paper
- positive
- positive
infection · growth · Cucumis melo (muskmelon)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
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.