Abstract
Low doses of lead (Pb) ions were used in the present study to investigate their effects on photosynthetic efficiency in Brassica juncea. Plants of B. juncea grown for 30, 45, and 60 days were analysed for root and shoot length, pigment content, gas exchange, chlorophyll fluorescence, primary and secondary metabolites, and nonenzymatic antioxidant responses under exposure to hormetic doses of Pb2+. The findings show that low levels of Pb2+ (especially 18- and 36-µM Pb treatments) improve gas exchange metrics, chlorophyll fluorescence parameters, root and shoot growth, and increased amounts of chlorophyll, carotenoid, xanthophyll and low amounts of pheophytin as compared with untreated B. juncea plants aged 30, 45, and 60 days. The study also shows increased concentrations of total sugar, free amino acids, anthocyanins, phenolics, flavonoids, and antioxidants (ascorbic acid and tocopherol). T his study emphasises the positive relationship between low Pb doses and plant-stage-dependent morphophysiological and biochemical responses, shedding light on the possible implications of hormesis for improving plant health and resilience across various growth stages.
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Claims 6
Claim · model-written summary
Low Pb improved gas exchange and fluorescence.
- Taxon
- B. juncea
Brassica junceae0 - Treatment
- 18- and 36-µM Pb treatmentse0
- Outcome
- gas exchange metrics, chlorophyll fluorescence parameterse0
- Direction
- improvee0
- Comparator
- untreated B. juncea plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low levels of Pb2+ (especially 18- and 36-µM Pb treatments) improve gas exchange metrics, chlorophyll fluorescence parameters, root and shoot growth, and increased amounts of chlorophyll, carotenoid, xanthophyll and low amounts of pheophytin as compared with untreated B. juncea plants aged 30, 45, and 60 days”
Claim · model-written summary
Low Pb improved root and shoot growth.
- Taxon
- B. junceaBrassica junceae0
- Treatment
- 18- and 36-µM Pb treatmentse0
- Outcome
- root and shoot growthe0
- Direction
- improvee0
- Comparator
- untreated B. juncea plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low levels of Pb2+ (especially 18- and 36-µM Pb treatments) improve gas exchange metrics, chlorophyll fluorescence parameters, root and shoot growth, and increased amounts of chlorophyll, carotenoid, xanthophyll and low amounts of pheophytin as compared with untreated B. juncea plants aged 30, 45, and 60 days”
Claim · model-written summary
Low Pb increased chlorophyll, carotenoid, and xanthophyll.
- Taxon
- B. junceaBrassica junceae0
- Treatment
- 18- and 36-µM Pb treatmentse0
- Outcome
- chlorophyll, carotenoid, xanthophylle0
- Direction
- increasede0
- Comparator
- untreated B. juncea plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low levels of Pb2+ (especially 18- and 36-µM Pb treatments) improve gas exchange metrics, chlorophyll fluorescence parameters, root and shoot growth, and increased amounts of chlorophyll, carotenoid, xanthophyll and low amounts of pheophytin as compared with untreated B. juncea plants aged 30, 45, and 60 days”
Claim · model-written summary
Low Pb was associated with low pheophytin amounts.
- Taxon
- B. junceaBrassica junceae0
- Treatment
- 18- and 36-µM Pb treatmentse0
- Outcome
- pheophytine0
- Direction
- lowe0
- Comparator
- untreated B. juncea plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low levels of Pb2+ (especially 18- and 36-µM Pb treatments) improve gas exchange metrics, chlorophyll fluorescence parameters, root and shoot growth, and increased amounts of chlorophyll, carotenoid, xanthophyll and low amounts of pheophytin as compared with untreated B. juncea plants aged 30, 45, and 60 days”
Claim · model-written summary
Pb exposure increased total sugar, free amino acids, and anthocyanins.
- Taxon
- Brassica junceaBrassica junceat0
- Treatment
- lead metal iont1
- Outcome
- total sugar, free amino acids, anthocyaninse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Brassica juncea”
t1“lead metal ion stimulated photosynthetic attributes in Brassica juncea”
e0“The study also shows increased concentrations of total sugar, free amino acids, anthocyanins, phenolics, flavonoids, and antioxidants (ascorbic acid and tocopherol)”
Claim · model-written summary
Pb exposure increased phenolics, flavonoids, and antioxidants.
- Taxon
- Brassica junceaBrassica junceat0
- Treatment
- lead metal iont0
- Outcome
- phenolics, flavonoids, and antioxidants (ascorbic acid and tocopherol)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lead metal ion stimulated photosynthetic attributes in Brassica juncea”
e0“The study also shows increased concentrations of total sugar, free amino acids, anthocyanins, phenolics, flavonoids, and antioxidants (ascorbic acid and tocopherol)”
The same questions in other papers
lead atom · physiology: pigments · Brassica juncea (Indian mustard)Results differ
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
lead atom · growth · Brassica juncea (Indian mustard)Results differ
1 paper in the same direction as this paper · 11 in the opposite direction
- negative
- negative
- negative
9 papers more in this group
See all 13 papers →lead atom · physiology: photosynthesis · Brassica juncea (Indian mustard)Positive and negative results
1 in the opposite direction
- negative
lead atom · molecular: metabolites · Brassica juncea (Indian mustard)Positive and negative results
2 in the opposite direction
- negative
- negative
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.