Abstract
Resistance of an alfalfa clone to Verticillium albo-atrum was attenuated by manipulating photosynthetic photon flux density (PPFD). Effects of PPFD and V. albo-atrum on dark respiration, in vivo ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) activity, in vitro total Rubisco activity, quantity of Rubisco, molar activity of Rubisco, and ribulose-1,5-bisphosphate (RuBP) regeneration rate were examined in a factorial experiment with pathogen (inoculated or noninoculated) and PPFD (40, 70, and 100% PPFD) as the treatments. Pathogen × PPFD interactions were detected in dark respiration, total protein, and amount of Rubisco. Dark respiration was suppressed by V. albo-atrum under 40% PPFD, increased under 70% PPFD, and unaffected by the pathogen under 100% PPFD. Total protein and Rubisco were reduced in inoculated plants only under 40% PPFD. In vitro total Rubisco activity was increased and regeneration rate of RuBP was reduced in all inoculated plants. The photosynthetic properties of the inoculated, resistant plants under 40% PPFD mimicked those reported for susceptible plants, but only dark respiration and amount of Rubisco were reduced by the presence of V. alba-atrum; the other properties were reduced by the PPFD treatment. The increase in in vitro total Rubisco activity and decrease in RuBP regeneration rate in inoculated, resistant alfalfa suggest that photosynthetic acclimation may be optimizing carbon assimilation in alfalfa resistant to V. albo-atrum
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Claims 10
Claim · model-written summary
PPFD manipulation attenuated resistance to Verticillium.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- manipulating photosynthetic photon flux density (PPFD)e0
- Interactor
- Verticillium albo-atrum
Verticillium albo-atrume0pathogen - Outcome
- Resistancee0
- Direction
- attenuatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Resistance of an alfalfa clone to Verticillium albo-atrum was attenuated by manipulating photosynthetic photon flux density (PPFD).”
t0“alfalfa”
Claim · model-written summary
Inoculation suppressed dark respiration at 40% PPFD.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- V. albo-atrume0
- Interactor
- V. albo-atrumVerticillium albo-atrume0pathogen
- Outcome
- Dark respiratione0
- Direction
- suppressede0
- Qualifier
- 40% PPFDe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dark respiration was suppressed by V. albo-atrum under 40% PPFD”
t0“alfalfa”
Claim · model-written summary
Inoculation increased dark respiration at 70% PPFD.
- Taxon
- alfalfaMedicago sativat0
- Direction
- increasede0
- Qualifier
- 70% PPFDe0
Not reportedInteractorInteractor roleTreatmentComparatorOutcome
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased under 70% PPFD”
t0“alfalfa”
Claim · model-written summary
Inoculation left dark respiration unaffected at 100% PPFD.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- the pathogene0
- Direction
- unaffectede0
- Qualifier
- 100% PPFDe0
Not reportedComparatorOutcome
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“unaffected by the pathogen under 100% PPFD.”
t0“alfalfa”
Claim · model-written summary
Inoculation reduced total protein only at 40% PPFD.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- inoculated plantse0
- Gene
- Rubiscoe0
- Outcome
- Total proteine0
- Direction
- reducede0
- Qualifier
- 40% PPFDe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total protein and Rubisco were reduced in inoculated plants only under 40% PPFD.”
t0“alfalfa”
Claim · model-written summary
Inoculation reduced Rubisco amount only at 40% PPFD.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- inoculated plantse0
- Gene
- Rubiscoe0
- Outcome
- Rubiscoe0
- Direction
- reducede0
- Qualifier
- 40% PPFDe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total protein and Rubisco were reduced in inoculated plants only under 40% PPFD.”
t0“alfalfa”
Claim · model-written summary
Inoculation increased total in vitro Rubisco activity.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- inoculated plantse0
- Gene
- Rubiscoe0
- Outcome
- In vitro total Rubisco activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In vitro total Rubisco activity was increased and regeneration rate of RuBP was reduced in all inoculated plants.”
t0“alfalfa”
Claim · model-written summary
Inoculation reduced RuBP regeneration rate.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- inoculated plantse0
- Compound
- RuBPe0
- Outcome
- regeneration rate of RuBPe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In vitro total Rubisco activity was increased and regeneration rate of RuBP was reduced in all inoculated plants.”
t0“alfalfa”
Claim · model-written summary
Inoculated resistant plants at 40% PPFD resembled susceptible plants in photosynthetic properties.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- inoculatede0
- Outcome
- photosynthetic propertiese0
- Direction
- mimickede0
- Qualifier
- 40% PPFDe0
- Comparator
- susceptible plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthetic properties of the inoculated, resistant plants under 40% PPFD mimicked those reported for susceptible plants”
t0“alfalfa”
Claim · model-written summary
PPFD treatment reduced other photosynthetic properties.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- PPFD treatmente0
- Outcome
- other propertiese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the other properties were reduced by the PPFD treatment.”
t0“alfalfa”
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