Abstract
Worldwide, crop productivity is highly influenced by heavy metal toxicity. Lead (Pb) the is second-most toxic heavy metal that has high persistence in soil. Lead is translocated in plants from rhizosphere soil and enters the food chain, where it poses a significant hazard to the health of humans. In the present investigation, seed priming with triacontanol (Tria) was used to mitigate Pb phytotoxicity in Phaseolus vulgaris L. (common bean). Seeds were primed with different concentrations of Tria (control, 10 µmol L−1, 20 µmol L−1, 30 µmol L−1) solutions. The pot experiment was carried out by sowing Tria-primed seeds in contaminated soil with 400 mg kg−1 Pb. Lead alone induced a decrease in the rate of germination and a significant reduction in biomass and growth of P. vulgaris as compared to the control. All these negative effects were reversed by Tria-primed seeds. Proliferation of photosynthetic pigments was observed 1.8-fold by Tria under Pb stress. Primed seeds with 20 µmol L−1 Tria enhanced stomatal conductance (gs), photosynthetic rate (A), transpiration rate (Ei), and uptake of mineral contents (Mg+2, Zn+2, Na+, and K+) and reduced Pb accumulation in seedlings. Tria caused a 1.3-fold increase in osmotic regulator proline synthesis to alleviate Pb stress. Phenolics, soluble protein, and DPPH free radical scavenging activity were enhanced by Tria application, suggesting that exogenous Tria could be employed to improve plant tolerance to Pb stress.
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Claims 9
Claim · model-written summary
Lead reduced common bean germination rate compared with the control.
- Taxon
- Phaseolus vulgaris L.
Phaseolus vulgarist0 - Treatment
- Leade0
- Outcome
- rate of germinatione0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lead alone induced a decrease in the rate of germination”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Lead significantly reduced common bean biomass and growth compared with the control.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Outcome
- biomass and growthe0
- Direction
- reductione0
- Comparator
- the controle0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant reduction in biomass and growth of P. vulgaris as compared to the control”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Triacontanol priming reversed the negative lead effects.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- Tria-primed seedse0
- Outcome
- All these negative effects were reversed by Tria-primed seedse0
- Direction
- reversede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All these negative effects were reversed by Tria-primed seeds”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Triacontanol increased photosynthetic pigments 1.8-fold under lead stress.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- Triae0
- Outcome
- photosynthetic pigmentse0
- Direction
- Proliferatione0
- Value
- 1.8-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proliferation of photosynthetic pigments was observed 1.8-fold by Tria under Pb stress”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Priming with 20 µmol L−1 triacontanol enhanced gas exchange traits under lead stress.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- 20 µmol L−1 Triae0
- Outcome
- stomatal conductance (gs), photosynthetic rate (A), transpiration rate (Ei)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Primed seeds with 20 µmol L−1 Tria enhanced stomatal conductance (gs), photosynthetic rate (A), transpiration rate (Ei)”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Priming with 20 µmol L−1 triacontanol enhanced mineral uptake.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- 20 µmol L−1 Triae0
- Outcome
- uptake of mineral contents (Mg+2, Zn+2, Na+, and K+)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Primed seeds with 20 µmol L−1 Tria enhanced stomatal conductance (gs), photosynthetic rate (A), transpiration rate (Ei), and uptake of mineral contents (Mg+2, Zn+2, Na+, and K+)”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Priming with 20 µmol L−1 triacontanol reduced lead accumulation in seedlings.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Outcome
- Pb accumulatione0
- Direction
- reducede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced Pb accumulation in seedlings”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Triacontanol increased proline synthesis 1.3-fold.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- Triae0
- Outcome
- proline synthesise0
- Direction
- increasee0
- Value
- 1.3-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tria caused a 1.3-fold increase in osmotic regulator proline synthesis”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Triacontanol enhanced phenolics, soluble protein and DPPH scavenging activity.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- Tria applicatione0
- Outcome
- Phenolics, soluble protein, and DPPH free radical scavenging activitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phenolics, soluble protein, and DPPH free radical scavenging activity were enhanced by Tria application”
t0“Phaseolus vulgaris L.”
The same questions in other papers
lead atom · growth · Phaseolus vulgaris (common bean)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
3 papers more in this group
See all 7 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.