Abstract
The responses to photoinhibition of photosynthesis at low temperature and subsequent recovery were examined in Arabidopsis thaliana (ecotype Columbia) developed at 4°C cold‐acclimating conditions, 23°C non‐acclimating conditions and for non‐acclimated plants shifted to 4°C (cold‐shifted). These responses were determined in planta using Chl fluorescence imaging. We show that cold acclimation results in an increased tolerance to photoinhibition in comparison with non‐acclimated plants and that growth and development at low temperature is essential for this to occur. Cold‐shifted plants were not as tolerant as the cold‐acclimated plants. In addition, we demonstrate this tolerance is as a result of growth under high PSII excitation pressure, that can be modulated by growth temperature or growth irradiance. Cold‐acclimated and cold‐shifted plants fully recover from photoinhibition in the dark, whereas non‐acclimated plants show reduced levels of recovery and demonstrate a requirement for light. The role of the PSII repair cycle, PSII quenching centres, and the use of Chl fluorescence imaging to monitor photoinhibitory responses in planta are discussed.
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Claims 6
Claim · model-written summary
Cold acclimation increased tolerance to photoinhibition versus non-acclimated plants.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Treatment
- cold acclimatione0
- Outcome
- tolerance to photoinhibitione0
- Direction
- increasede0
- Comparator
- non‐acclimated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cold acclimation results in an increased tolerance to photoinhibition in comparison with non‐acclimated plants”
t0“Arabidopsis thaliana”
Claim · model-written summary
Cold-shifted plants were less tolerant than cold-acclimated plants.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- Cold‐shifted plantse0
- Outcome
- tolerante0
- Direction
- not as tolerante0
- Comparator
- cold‐acclimated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cold‐shifted plants were not as tolerant as the cold‐acclimated plants”
t0“Arabidopsis thaliana”
Claim · model-written summary
The authors attribute photoinhibition tolerance to growth under high PSII excitation pressure.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- growth under high PSII excitation pressuree0
- Outcome
- tolerancee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this tolerance is as a result of growth under high PSII excitation pressure, that can be modulated by growth temperature or growth irradiance”
t0“Arabidopsis thaliana”
Claim · model-written summary
Cold-acclimated plants fully recovered from photoinhibition in the dark.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- Cold‐acclimatede0
- Outcome
- fully recover from photoinhibition in the darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cold‐acclimated and cold‐shifted plants fully recover from photoinhibition in the dark”
t0“Arabidopsis thaliana”
Claim · model-written summary
Cold-shifted plants fully recovered from photoinhibition in the dark.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- cold‐shifted plantse0
- Outcome
- fully recover from photoinhibition in the darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cold‐acclimated and cold‐shifted plants fully recover from photoinhibition in the dark”
t0“Arabidopsis thaliana”
Claim · model-written summary
Non-acclimated plants had reduced recovery and required light.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- non‐acclimated plantse0
- Outcome
- levels of recoverye0
- Direction
- reducede0
- Qualifier
- requirement for lighte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“non‐acclimated plants show reduced levels of recovery and demonstrate a requirement for light”
t0“Arabidopsis thaliana”
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