Abstract
Abstract A hydroponic experiment was conducted to evaluate the role of potassium (K) in tomato plant growth exposed to cadmium (Cd) stress. In this work, the effects of three potassium nutrition regimes (155, 232 and 310 ppm of K) combined with Cd at different levels (0, 12 and 25 µM of CdCl 2 ) on chlorophyll content index, root and shoot dry weights, root morphology, chlorophyll a fluorescence and translocation factor were analyzed. The results showed a negative effect of cadmium, at different concentrations, on all these parameters. However, optimization of K nutrition has shown promising results by limiting the negative effect of Cd. A positive effect of the high concentration of K (310 ppm) was observed on leaf chlorophyll content and chlorophyll a fluorescence compared to 232 and 155 ppm under Cd stress. K supply improved the electron transport at PSI side indicated by the increase in the amplitude of the I–P phase of OJIP transient. Also, K at a concentration of 310 ppm significantly reduced Cd translocation from root to shoot and improved root and shoot growth parameters in the presence of Cd. K supplementation can reduce the negative effect of Cd by improving photosynthesis and promoting chlorophyll synthesis. The optimization of nutrients composition and concentration might be a good strategy to reduce the impact of Cd on plant growth and physiology.
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Claims 6
Claim · model-written summary
Cadmium negatively affected measured tomato growth, root morphology, chlorophyll and translocation parameters.
- Treatment
- cadmiume0
- Outcome
- chlorophyll content index, root and shoot dry weights, root morphologye1
- Direction
- negative effecte0
Not reportedTaxonComparator
Verbatim
e0“The results showed a negative effect of cadmium, at different concentrations, on all these parameters”
e1“chlorophyll content index, root and shoot dry weights, root morphology, chlorophyll a fluorescence and translocation factor”
Claim · model-written summary
High potassium at 310 ppm improved tomato leaf chlorophyll content relative to 232 and 155 ppm under cadmium stress.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- high concentration of K (310 ppm)e0
- Outcome
- leaf chlorophyll contente0
- Direction
- positive effecte0
- Comparator
- 232 and 155 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A positive effect of the high concentration of K (310 ppm) was observed on leaf chlorophyll content and chlorophyll a fluorescence compared to 232 and 155 ppm under Cd stress”
t0“tomato plant”
Claim · model-written summary
High potassium at 310 ppm improved tomato chlorophyll a fluorescence relative to 232 and 155 ppm under cadmium stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- high concentration of K (310 ppm)e0
- Outcome
- chlorophyll a fluorescencee0
- Direction
- positive effecte0
- Comparator
- 232 and 155 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A positive effect of the high concentration of K (310 ppm) was observed on leaf chlorophyll content and chlorophyll a fluorescence compared to 232 and 155 ppm under Cd stress”
t0“tomato plant”
Claim · model-written summary
Potassium supply improved electron transport at the PSI side in tomato.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- K supplye0
- Outcome
- electron transport at PSI sidee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K supply improved the electron transport at PSI side indicated by the increase in the amplitude of the I–P phase of OJIP transient”
t0“tomato plant”
Claim · model-written summary
Potassium at 310 ppm significantly reduced cadmium translocation from tomato root to shoot under cadmium exposure.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- K at a concentration of 310 ppme0
- Outcome
- Cd translocation from root to shoote0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K at a concentration of 310 ppm significantly reduced Cd translocation from root to shoot and improved root and shoot growth parameters in the presence of Cd”
t0“tomato plant”
Claim · model-written summary
Potassium at 310 ppm improved tomato root and shoot growth parameters in cadmium exposure.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- K at a concentration of 310 ppme0
- Outcome
- root and shoot growth parameterse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K at a concentration of 310 ppm significantly reduced Cd translocation from root to shoot and improved root and shoot growth parameters in the presence of Cd”
t0“tomato plant”
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