Abstract
This study aimed to investigate the Cd-removal efficiency from the soil by rapes (Brassica napus L.) under changing climate conditions, i.e. elevated temperature and CO2 with or without additional drought stress. As photosynthesis is the most important primary metabolic process, determining plant growth, Cd-phytoextraction performance was evaluated through the changes in chlorophyll a fluorescence (ChlF) parameters that are widely used to quantify abiotic stress responses. The results showed that, with the less affected photochemical quantum yields and better general physiological state of PSII, well-watered rapes grown under elevated temperature and CO2 conditions produced significantly higher harvestable biomass and extracted significantly higher Cd content from the soil than those grown under ambient temperature and CO2 conditions. Drought fully negated this gain; however, Cd-phytoextraction performance by rapes under the combined impact of elevated temperature, CO2 and drought was not related to the changes of selected ChlF parameters, suggesting other restrictions to photosynthesis under additional drought stress than the reduced photochemical activity due to the decrease in electron transport flow.
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Claims 7
Claim · model-written summary
Well-watered rapes grown under elevated temperature and CO2 produced higher harvestable biomass than under ambient conditions.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse1 - Treatment
- elevated temperature and CO2e2
- Outcome
- harvestable biomasse2
- Direction
- highere2
- Qualifier
- well-waterede2
- Comparator
- ambient temperature and CO2 conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e1“Cd-removal efficiency from the soil by rapes (Brassica napus L.)”
e2“with the less affected photochemical quantum yields and better general physiological state of PSII, well-watered rapes grown under elevated temperature and CO2 conditions produced significantly higher harvestable biomass and extracted significantly higher Cd content from the soil than those grown under ambient temperature and CO2 conditions”
Claim · model-written summary
Rapes grown under elevated temperature and CO2 extracted higher Cd content from the soil than under ambient conditions.
- Taxon
- Brassica napusBrassica napuse1
- Treatment
- elevated temperature and CO2e2
- Outcome
- Cd content from the soile2
- Direction
- highere2
- Qualifier
- well-waterede2
- Comparator
- ambient temperature and CO2 conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Cd-removal efficiency from the soil by rapes (Brassica napus L.)”
e2“with the less affected photochemical quantum yields and better general physiological state of PSII, well-watered rapes grown under elevated temperature and CO2 conditions produced significantly higher harvestable biomass and extracted significantly higher Cd content from the soil than those grown under ambient temperature and CO2 conditions”
Claim · model-written summary
Drought fully negated the gain from elevated temperature and CO2.
- Taxon
- Brassica napusBrassica napuse1
- Treatment
- Droughte3
- Outcome
- this gaine3
- Direction
- negatede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Cd-removal efficiency from the soil by rapes (Brassica napus L.)”
e3“Drought fully negated this gain”
Claim · model-written summary
Cd-phytoextraction performance under combined elevated temperature, CO2 and drought was not related to the changes of selected ChlF parameters.
- Taxon
- Brassica napusBrassica napuse1
- Treatment
- combined impact of elevated temperature, CO2 and droughte4
- Outcome
- Cd-phytoextraction performancee4
- Direction
- not relatede4
- Qualifier
- selected ChlF parameterse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Cd-removal efficiency from the soil by rapes (Brassica napus L.)”
e4“Cd-phytoextraction performance by rapes under the combined impact of elevated temperature, CO2 and drought was not related to the changes of selected ChlF parameters”
Claim · model-written summary
Additional drought stress may restrict photosynthesis beyond the reduced photochemical activity.
- Taxon
- Brassica napusBrassica napuse1
- Treatment
- additional drought stresse5
- Outcome
- restrictions to photosynthesise5
- Qualifier
- reduced photochemical activity due to the decrease in electron transport flowe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Cd-removal efficiency from the soil by rapes (Brassica napus L.)”
e5“suggesting other restrictions to photosynthesis under additional drought stress than the reduced photochemical activity due to the decrease in electron transport flow”
Claim · model-written summary
Under elevated temperature and CO2, photochemical quantum yields were less affected than under ambient conditions.
- Taxon
- Brassica napusBrassica napuse1
- Treatment
- elevated temperature and CO2e2
- Outcome
- photochemical quantum yieldse2
- Direction
- less affectede2
- Comparator
- ambient temperature and CO2 conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Cd-removal efficiency from the soil by rapes (Brassica napus L.)”
e2“with the less affected photochemical quantum yields and better general physiological state of PSII, well-watered rapes grown under elevated temperature and CO2 conditions produced significantly higher harvestable biomass and extracted significantly higher Cd content from the soil than those grown under ambient temperature and CO2 conditions”
Claim · model-written summary
Under elevated temperature and CO2, the general physiological state of PSII was better than under ambient conditions.
- Taxon
- Brassica napusBrassica napuse1
- Treatment
- elevated temperature and CO2e2
- Outcome
- general physiological state of PSIIe2
- Direction
- bettere2
- Comparator
- ambient temperature and CO2 conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Cd-removal efficiency from the soil by rapes (Brassica napus L.)”
e2“with the less affected photochemical quantum yields and better general physiological state of PSII, well-watered rapes grown under elevated temperature and CO2 conditions produced significantly higher harvestable biomass and extracted significantly higher Cd content from the soil than those grown under ambient temperature and CO2 conditions”
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