Abstract
THE MAJOR aim was to assess the effects of lead stress on Triticum aestivum (cv. Gemmeza R2) and to evaluate the role of seed priming in the aqueous extract of Halimeda opuntia or Codium fragile in the alleviation of these harmful effects. Seven days old T. aestivum seedlings growing from primed seeds were subjected to the sub-lethal concentration (400ppm) of lead nitrate (Pb (NO3)2), then left to grow for 14 days. Results revealed that the lead nitrate significantly decreased root length, shoot height and fresh and dry masses of root and shoot, the content of N, PO4, K, Mg, Ca and Cu, photosynthetic pigments (Chl a, Chl b), total chlorophyll and photosynthetic activity of 21-days-old plants. On the other hand, carotenoid contents, total soluble sugars, Na and Fe content, the activities of catalase and peroxidase, ascorbic acid and malondialdehyde increased in leaves. The bioactive components in H. opuntia and C. fragile extracts such as minerals and phytohormones (auxins, cytokinins and gibberellins) could potentially participate in the alleviation of lead stress. Therefore, priming of T. aestivum seeds with the aqueous extracts of H. opuntia or C. fragile could mitigate all of the recorded harmful effects under lead stress.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Lead nitrate significantly decreased root length, shoot height, and root and shoot fresh and dry masses.
- Taxon
- Triticum aestivum
Triticum aestivumt0 - Treatment
- lead nitratee0
- Outcome
- root length, shoot height and fresh and dry masses of root and shoote0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results revealed that the lead nitrate significantly decreased root length, shoot height and fresh and dry masses of root and shoot, the content of N, PO4, K, Mg, Ca and Cu, photosynthetic pigments (Chl a, Chl b), total chlorophyll and photosynthetic activity of 21-days-old plants.”
t0“Triticum aestivum”
Claim · model-written summary
Lead nitrate significantly decreased N, PO4, K, Mg, Ca and Cu content.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Treatment
- lead nitratee0
- Outcome
- the content of N, PO4, K, Mg, Ca and Cue0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results revealed that the lead nitrate significantly decreased root length, shoot height and fresh and dry masses of root and shoot, the content of N, PO4, K, Mg, Ca and Cu, photosynthetic pigments (Chl a, Chl b), total chlorophyll and photosynthetic activity of 21-days-old plants.”
t0“Triticum aestivum”
Claim · model-written summary
Lead nitrate significantly decreased photosynthetic pigments and activity.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Treatment
- lead nitratee0
- Outcome
- photosynthetic pigments (Chl a, Chl b), total chlorophyll and photosynthetic activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results revealed that the lead nitrate significantly decreased root length, shoot height and fresh and dry masses of root and shoot, the content of N, PO4, K, Mg, Ca and Cu, photosynthetic pigments (Chl a, Chl b), total chlorophyll and photosynthetic activity of 21-days-old plants.”
t0“Triticum aestivum”
Claim · model-written summary
Lead exposure increased carotenoids, soluble sugars, Na and Fe content in leaves.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Organ / stage
- leavese0
- Treatment
- lead nitratee1
- Outcome
- carotenoid contents, total soluble sugars, Na and Fe contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On the other hand, carotenoid contents, total soluble sugars, Na and Fe content, the activities of catalase and peroxidase, ascorbic acid and malondialdehyde increased in leaves.”
e1“the sub-lethal concentration (400ppm) of lead nitrate”
t0“Triticum aestivum”
Claim · model-written summary
Lead exposure increased catalase and peroxidase activities, ascorbic acid and malondialdehyde in leaves.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Organ / stage
- leavese0
- Treatment
- lead nitratee1
- Outcome
- the activities of catalase and peroxidase, ascorbic acid and malondialdehydee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On the other hand, carotenoid contents, total soluble sugars, Na and Fe content, the activities of catalase and peroxidase, ascorbic acid and malondialdehyde increased in leaves.”
e1“the sub-lethal concentration (400ppm) of lead nitrate”
t0“Triticum aestivum”
Claim · model-written summary
Priming with H. opuntia extract could mitigate harmful lead effects.
- Taxon
- T. aestivumTriticum aestivume0
- Treatment
- aqueous extracts of H. opuntiae0
- Outcome
- harmful effectse0
- Direction
- mitigatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“priming of T. aestivum seeds with the aqueous extracts of H. opuntia or C. fragile could mitigate all of the recorded harmful effects under lead stress”
Claim · model-written summary
Priming with C. fragile extract could mitigate harmful lead effects.
- Taxon
- T. aestivumTriticum aestivume0
- Treatment
- C. fragilee0
- Outcome
- harmful effectse0
- Direction
- mitigatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“priming of T. aestivum seeds with the aqueous extracts of H. opuntia or C. fragile could mitigate all of the recorded harmful effects under lead stress”
The same questions in other papers
lead nitrate · molecular: metabolites · Triticum aestivum (wheat)Positive and negative results
1 in the opposite direction
- positive
lead nitrate · growth · Triticum aestivum (wheat)Results agree
2 papers in the same direction as this paper
- 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.