Abstract
The persistent nature of heavy metals makes them hazardous in long term. The use of natural chelation by tolerant plants remains a more rational and promising way for the environment compared to the use of chemical chela-tors. Barley has already been used as a model plant in the case of heavy met-als pollution.The present study focuses on the effect of lead at different con-centrations (100mg/l, 500mg/l and 900mg/l) on barley Hordem vulgare L. After 30 days of growth, the plants were harvested and physio-biochemical parameters (fresh weight, length, relative water content, photosynthetic pigments, hydrogen peroxide, lipid peroxidation, total protein and activity of catalase and peroxidase) were studied in both leaves and roots. Results re-vealed that lead induced a decrease in fresh weight, length, relative water content and photosynthetic pigments in lead treated plants compared to the control, while an increase was recorded in lipid peroxidation, hydrogen per-oxide production and protein content, the enhancement in the activity of antioxidant enzymes (catalase and peroxidase), revealed the capacity of bar-ley to react to stress caused by lead, indeed the antioxidant enzymes consti-tute among others, a way to protect the plant against oxidative stress in-duced by lead, furthermore the antioxidant enzymes are part of the toler-ance mechanisms used by plants against heavy metals, however the dosage of lead in the different parts of the plant remains essential because it could highlight a possible phytoextraction of lead by barley.
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Claims 6
Claim · model-written summary
Lead reduced fresh weight and length in barley relative to controls.
- Taxon
- Hordeum vulgare L.
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- leade0
- Outcome
- fresh weight, lengthe0
- Direction
- a decreasee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“lead induced a decrease in fresh weight, length, relative water content and photosynthetic pigments in lead treated plants compared to the control”
t0“Hordeum vulgare L.”
Claim · model-written summary
Lead reduced relative water content and photosynthetic pigments in barley.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- leade0
- Outcome
- relative water content and photosynthetic pigmentse0
- Direction
- a decreasee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lead induced a decrease in fresh weight, length, relative water content and photosynthetic pigments in lead treated plants compared to the control”
t0“Hordeum vulgare L.”
Claim · model-written summary
Lead increased lipid peroxidation and hydrogen peroxide production in barley.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- leade1
- Outcome
- lipid peroxidation, hydrogen per-oxide productione0
- Direction
- an increasee0
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase was recorded in lipid peroxidation, hydrogen per-oxide production and protein content”
e1“lead treated plants compared to the control”
t0“Hordeum vulgare L.”
Claim · model-written summary
Lead increased barley protein content.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- leade1
- Outcome
- protein contente0
- Direction
- an increasee0
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase was recorded in lipid peroxidation, hydrogen per-oxide production and protein content”
e1“lead treated plants compared to the control”
t0“Hordeum vulgare L.”
Claim · model-written summary
Lead enhanced catalase and peroxidase activity in barley.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- leade1
- Gene
- catalase and peroxidasee0
- Outcome
- activity of antioxidant enzymese0
- Direction
- enhancemente0
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the enhancement in the activity of antioxidant enzymes (catalase and peroxidase)”
e1“lead treated plants compared to the control”
t0“Hordeum vulgare L.”
Claim · model-written summary
The authors interpret antioxidant enzyme activity as a barley tolerance mechanism against lead-induced oxidative stress.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Gene
- antioxidant enzymese0
- Outcome
- toler-ance mechanismse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the antioxidant enzymes are part of the toler-ance mechanisms used by plants against heavy metals”
t0“Hordeum vulgare L.”
The same questions in other papers
lead atom · growth · Hordeum vulgare (barley)Results differ
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See all 5 papers →lead atom · physiology: oxidative · Hordeum vulgare (barley)Results agree
5 papers in the same direction as this paper
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See all 6 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.