Abstract
It is known that numerous stimuli induce electrical signals which can increase a plant’s tolerance to stressors, including high temperature. However, the physiological role of local electrical responses (LERs), i.e. responses in the zone of stimulus action, in the plant’s tolerance has not been sufficiently investigated. The aim of a current work is to analyze the connection between parameters of LERs with the thermal tolerance of photosynthetic processes in pea. Electrical activity and photosynthetic parameters in pea leaves were registered during transitions of air temperature in a measurement head (from 23 to 30°C, from 30 to 40°C, from 40 to 45°C and from 45 to 23°C). This stepped heating decreased a photosynthetic assimilation of CO2 and induced generation of LERs in the heated leaf. Amplitudes of LERs, quantity of responses during the heating and the number of temperature transition, which induced the first generation of LERs, varied among different pea plants. Parameters of LERs were weakly connected with the photosynthetic assimilation of CO2 during the heating; however, a residual photosynthetic activity after a treatment by high temperatures increased with the growth of amplitudes and quantity of LERs and with lowering of the number of the heating transition, inducing the first electrical response. The effect was not connected with a photosynthetic activity before heating; similar dependences were also observed for effective and maximal quantum yields of photosystem II after heating. We believe that the observed effect can reflect a positive influence of LERs on the thermal tolerance of photosynthesis. It is possible that the process can participate in a plant’s adaptation to stressors.
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Claims 10
Claim · model-written summary
Stepped heating reduced photosynthetic CO2 assimilation in pea.
- Taxon
- pea
Lathyrus oleraceuse1 - Treatment
- stepped heatinge0
- Outcome
- photosynthetic assimilation of CO2e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This stepped heating decreased a photosynthetic assimilation of CO2 and induced generation of LERs in the heated leaf.”
e1“Electrical activity and photosynthetic parameters in pea leaves were registered during transitions of air temperature”
Claim · model-written summary
Stepped heating induced local electrical responses in pea leaves.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- stepped heatinge0
- Outcome
- generation of LERs in the heated leafe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This stepped heating decreased a photosynthetic assimilation of CO2 and induced generation of LERs in the heated leaf.”
e1“Electrical activity and photosynthetic parameters in pea leaves were registered during transitions of air temperature”
Claim · model-written summary
LER amplitude, number and onset temperature transition varied among pea plants.
- Taxon
- pea plantsLathyrus oleraceuse0
- Outcome
- Amplitudes of LERs, quantity of responses during the heating and the number of temperature transition, which induced the first generation of LERse0
- Direction
- variede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amplitudes of LERs, quantity of responses during the heating and the number of temperature transition, which induced the first generation of LERs, varied among different pea plants.”
Claim · model-written summary
LER parameters were weakly related to photosynthetic CO2 assimilation during heating.
- Taxon
- peaLathyrus oleraceuse1
- Organ / stage
- leavese1
- Outcome
- photosynthetic assimilation of CO2 during the heatinge0
- Qualifier
- weakly connectede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Parameters of LERs were weakly connected with the photosynthetic assimilation of CO2 during the heating”
e1“pea leaves”
Claim · model-written summary
Residual photosynthetic activity increased with LER amplitude after high-temperature treatment.
- Taxon
- peaLathyrus oleraceuse1
- Organ / stage
- leavese1
- Treatment
- a treatment by high temperaturese0
- Outcome
- residual photosynthetic activitye0
- Direction
- increasede0
- Qualifier
- growth of amplitudese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a residual photosynthetic activity after a treatment by high temperatures increased with the growth of amplitudes and quantity of LERs”
e1“pea leaves”
Claim · model-written summary
Residual photosynthetic activity increased with the quantity of LERs.
- Taxon
- peaLathyrus oleraceuse1
- Organ / stage
- leavese1
- Treatment
- a treatment by high temperaturese0
- Outcome
- residual photosynthetic activitye0
- Direction
- increasede0
- Qualifier
- quantity of LERse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a residual photosynthetic activity after a treatment by high temperatures increased with the growth of amplitudes and quantity of LERs”
e1“pea leaves”
Claim · model-written summary
Residual photosynthetic activity increased when the first electrical response occurred at an earlier heating transition.
- Taxon
- peaLathyrus oleraceuse1
- Organ / stage
- leavese1
- Treatment
- a treatment by high temperaturese0
- Outcome
- residual photosynthetic activitye0
- Direction
- increasede0
- Qualifier
- lowering of the number of the heating transitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a residual photosynthetic activity after a treatment by high temperatures increased with the growth of amplitudes and quantity of LERs and with lowering of the number of the heating transition, inducing the first electrical response.”
e1“pea leaves”
Claim · model-written summary
The post-heating relation was independent of pre-heating photosynthetic activity.
- Taxon
- peaLathyrus oleraceuse1
- Organ / stage
- leavese1
- Outcome
- photosynthetic activity before heatinge0
- Qualifier
- not connectede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect was not connected with a photosynthetic activity before heating”
e1“pea leaves”
Claim · model-written summary
Similar LER relations were observed for effective and maximal photosystem II quantum yields after heating.
- Taxon
- peaLathyrus oleraceuse1
- Organ / stage
- leavese1
- Outcome
- effective and maximal quantum yields of photosystem II after heatinge0
- Qualifier
- similar dependencese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“similar dependences were also observed for effective and maximal quantum yields of photosystem II after heating.”
e1“pea leaves”
Claim · model-written summary
The authors suggest LERs may positively influence photosynthetic heat tolerance.
- Taxon
- peaLathyrus oleraceuse1
- Organ / stage
- leavese1
- Outcome
- thermal tolerance of photosynthesise0
- Direction
- positive influencee0
- Qualifier
- LERse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the observed effect can reflect a positive influence of LERs on the thermal tolerance of photosynthesis.”
e1“pea leaves”
The same questions in other papers
heat · physiology: photosynthesis · Lathyrus oleraceus (pea)Positive and negative results
9 papers in the same direction as this paper · 1 in the opposite direction
- negative
- negative
- negative
7 papers more in this group
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.