Abstract
Local damage induces generation and propagation of variation potentials (VPs) that affect physiological processes in plants. The aims of the work presented here were to investigate parameters of VP induced by burning, heating and mechanical injury in pea seedlings, and to undertake a theoretical analysis of the mechanisms underlying the differences in VP parameters and a study of the photosynthetic responses caused by VPs induced by the damaging factors. The velocity of propagation of burn-induced VP decreased with distance from the damaged area whereas the velocities of heating- and injury-induced VPs were constant. The amplitudes of burn- and heating-induced VPs did not depend on distance whereas the amplitude of VP induced by mechanical injury decreased. VP propagation has been simulated on the basis of wound substance spread. The simulation revealed two possible ways of wound substance propagation: turbulent diffusion from the damaged area and secondary active production in intact cells. The photosynthetic response (decrease in the quantum yield of PSII and raising the level of non-photochemical fluorescence quenching (NPQ)) developed in case of VP entering the intact leaf under heating and burn but was not registered after mechanical injury. An increase in NPQ level was biphasic under burn in comparison with a single-phase one under heating, and the NPQ amplitude was slightly higher under burn. We suggest that differences in photosynthetic responses may be determined by the parameters of VPs induced by stimuli of different nature.
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Claims 12
Claim · model-written summary
Burn-induced variation-potential propagation velocity declined with distance from injury.
- Taxon
- pea seedlings
Lathyrus oleraceuse1 - Outcome
- velocity of propagation of burn-induced VPe0
- Direction
- decreasede0
- Setting
- distance from the damaged areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The velocity of propagation of burn-induced VP decreased with distance from the damaged area”
e1“pea seedlings”
Claim · model-written summary
Heating-induced variation-potential propagation velocity remained constant with distance.
- Taxon
- pea seedlingsLathyrus oleraceuse2
- Outcome
- velocities of heating- and injury-induced VPse0
- Direction
- constante0
- Setting
- distance from the damaged areae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the velocities of heating- and injury-induced VPs were constant”
e1“distance from the damaged area”
e2“pea seedlings”
Claim · model-written summary
Burn- and heating-induced variation-potential amplitudes did not depend on distance.
- Taxon
- pea seedlingsLathyrus oleraceuse1
- Outcome
- amplitudes of burn- and heating-induced VPse0
- Direction
- did not depende0
- Setting
- distancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amplitudes of burn- and heating-induced VPs did not depend on distance”
e1“pea seedlings”
Claim · model-written summary
Mechanical-injury variation-potential amplitude declined with distance.
- Taxon
- pea seedlingsLathyrus oleraceuse1
- Treatment
- mechanical injurye0
- Outcome
- amplitude of VP induced by mechanical injurye0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the amplitude of VP induced by mechanical injury decreased”
e1“pea seedlings”
Claim · model-written summary
Simulation indicated turbulent diffusion from damage as a possible wound-substance propagation route.
- Taxon
- pea seedlingsLathyrus oleraceuse1
- Outcome
- turbulent diffusion from the damaged areae0
- Qualifier
- possible ways of wound substance propagatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The simulation revealed two possible ways of wound substance propagation: turbulent diffusion from the damaged area and secondary active production in intact cells”
e1“pea seedlings”
Claim · model-written summary
Simulation indicated secondary active production in intact cells as another possible wound-substance propagation route.
- Taxon
- pea seedlingsLathyrus oleraceuse1
- Outcome
- secondary active production in intact cellse0
- Qualifier
- possible ways of wound substance propagatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The simulation revealed two possible ways of wound substance propagation: turbulent diffusion from the damaged area and secondary active production in intact cells”
e1“pea seedlings”
Claim · model-written summary
Heating- and burn-induced potentials entering intact pea leaves reduced PSII quantum yield.
- Taxon
- pea seedlingsLathyrus oleraceuse1
- Organ / stage
- intact leafe0
- Treatment
- heating and burne0
- Outcome
- quantum yield of PSIIe0
- Direction
- decreasee0
- Comparator
- mechanical injurye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthetic response (decrease in the quantum yield of PSII and raising the level of non-photochemical fluorescence quenching (NPQ)) developed in case of VP entering the intact leaf under heating and burn but was not registered after mechanical injury”
e1“pea seedlings”
Claim · model-written summary
Heating- and burn-induced potentials entering intact pea leaves raised NPQ.
- Taxon
- pea seedlingsLathyrus oleraceuse1
- Treatment
- heating and burne0
- Outcome
- level of non-photochemical fluorescence quenching (NPQ)e0
- Direction
- raisinge0
- Comparator
- mechanical injurye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthetic response (decrease in the quantum yield of PSII and raising the level of non-photochemical fluorescence quenching (NPQ)) developed in case of VP entering the intact leaf under heating and burn but was not registered after mechanical injury”
e1“pea seedlings”
Claim · model-written summary
The photosynthetic response was absent after mechanical injury.
- Taxon
- pea seedlingsLathyrus oleraceuse2
- Treatment
- mechanical injurye0
- Outcome
- photosynthetic responsee1
- Direction
- not registerede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but was not registered after mechanical injury”
e1“The photosynthetic response”
e2“pea seedlings”
Claim · model-written summary
Burn-induced NPQ increase was biphasic versus single-phase after heating.
- Taxon
- pea seedlingsLathyrus oleraceuse1
- Treatment
- burne0
- Outcome
- increase in NPQ levele0
- Direction
- biphasice0
- Comparator
- heatinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An increase in NPQ level was biphasic under burn in comparison with a single-phase one under heating”
e1“pea seedlings”
Claim · model-written summary
NPQ amplitude was slightly higher under burn than heating.
- Taxon
- pea seedlingsLathyrus oleraceuse2
- Treatment
- burne0
- Outcome
- NPQ amplitudee0
- Direction
- highere0
- Qualifier
- slightlye0
- Comparator
- heatinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the NPQ amplitude was slightly higher under burn”
e1“single-phase one under heating”
e2“pea seedlings”
Claim · model-written summary
Authors suggest stimulus-specific potential parameters may determine photosynthetic response differences.
- Taxon
- pea seedlingsLathyrus oleraceuse1
- Outcome
- differences in photosynthetic responsese0
- Qualifier
- parameters of VPs induced by stimuli of different naturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We suggest that differences in photosynthetic responses may be determined by the parameters of VPs induced by stimuli of different nature”
e1“pea seedlings”
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See all 11 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.