Abstract
The aim of this study was to analyse the relationship between root growth inhibition and alterations in catalase (CAT) and ascorbate peroxidase (APX) contents and activities in barley root tips during the recovery after short-term Cd stress. Significant root growth inhibition was observed after a relatively short-term (30 min) exposure of barley roots to low 15 μM Cd concentration. In seedlings treated with 30 μM Cd root growth was renewed 8-9 h after Cd treatment. By contrast, seedlings exposed to 60 μM Cd failed to restore root growth. The CAT activity increased after 15 μM Cd treatment, whereas, higher Cd concentrations inhibited CAT activity. However, APX activity was not affected by Cd treatment. The content of APX1 transcript increased while content of APX2 decreased 3 h after short-term treatment in a concentration dependent manner. While the expression of CAT1 was upregulated after 15 and 30 μM Cd treatment, it was strongly downregulated by 60 μM Cd. By contrast, CAT2 was upregulated in a concentration dependent manner. These results suggest that increased CAT activity is crucial for restoration of root growth after moderate Cd stress while at severe Cd stress its inhibition may lead to the irreversible damages.
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Claims 13
Claim · model-written summary
15 μM Cd significantly inhibited barley root growth after 30 minutes.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- 15 μM Cde0
- Outcome
- root growthe0
- Direction
- inhibitione0
- Value
- 30 mine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Significant root growth inhibition was observed after a relatively short-term (30 min) exposure of barley roots to low 15 μM Cd concentration.”
Claim · model-written summary
Root growth resumed 8-9 hours after 30 μM Cd treatment.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- 30 μM Cde0
- Outcome
- root growth was renewede0
- Value
- 8-9 he0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In seedlings treated with 30 μM Cd root growth was renewed 8-9 h after Cd treatment.”
t0“barley”
Claim · model-written summary
Root growth failed to recover after 60 μM Cd.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- 60 μM Cde0
- Outcome
- failed to restore root growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedlings exposed to 60 μM Cd failed to restore root growth.”
t0“barley”
Claim · model-written summary
CAT activity increased after 15 μM Cd.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The CAT activity increased after 15 μM Cd treatment”
t0“barley”
Claim · model-written summary
Higher cadmium concentrations inhibited CAT activity.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- higher Cd concentrationse0
- Gene
- CATe0
- Outcome
- CAT activitye0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher Cd concentrations inhibited CAT activity.”
t0“barley”
Claim · model-written summary
APX activity was not affected by cadmium.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- Cd treatmente0
- Gene
- APXe0
- Outcome
- APX activitye0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“APX activity was not affected by Cd treatment.”
t0“barley”
Claim · model-written summary
APX1 transcript increased after treatment in a concentration dependent manner.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- short-term treatmente0
- Gene
- APX1e0
- Outcome
- content of APX1 transcripte0
- Direction
- increasede0
- Qualifier
- 3 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of APX1 transcript increased while content of APX2 decreased 3 h after short-term treatment in a concentration dependent manner.”
t0“barley”
Claim · model-written summary
APX2 transcript decreased after treatment in a concentration dependent manner.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- short-term treatmente0
- Gene
- APX2e0
- Outcome
- content of APX2e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“content of APX2 decreased 3 h after short-term treatment in a concentration dependent manner.”
t0“barley”
Claim · model-written summary
CAT1 expression was upregulated after 15 and 30 μM Cd.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- 15 and 30 μM Cd treatmente0
- Gene
- CAT1e0
- Outcome
- expression of CAT1e0
- Direction
- upregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the expression of CAT1 was upregulated after 15 and 30 μM Cd treatment”
t0“barley”
Claim · model-written summary
CAT1 expression was downregulated after 60 μM Cd.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- 60 μM Cde0
- Gene
- CAT1e0
- Outcome
- strongly downregulatede0
- Direction
- downregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“While the expression of CAT1 was upregulated after 15 and 30 μM Cd treatment, it was strongly downregulated by 60 μM Cd.”
t0“barley”
Claim · model-written summary
CAT2 was upregulated in a concentration dependent manner.
- Taxon
- barleyHordeum vulgaret0
- Gene
- CAT2e0
- Outcome
- CAT2e0
- Direction
- upregulatede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CAT2 was upregulated in a concentration dependent manner.”
t0“barley”
Claim · model-written summary
Increased CAT activity may be crucial for growth recovery after moderate Cd stress.
- Taxon
- barleyHordeum vulgaret0
- Gene
- CATe0
- Outcome
- restoration of root growthe0
- Qualifier
- moderate Cd stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased CAT activity is crucial for restoration of root growth after moderate Cd stress”
t0“barley”
Claim · model-written summary
CAT inhibition under severe Cd stress may cause irreversible damage.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- severe Cd stresse0
- Outcome
- irreversible damagese0
- Qualifier
- its inhibitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at severe Cd stress its inhibition may lead to the irreversible damages.”
t0“barley”
The same questions in other papers
cadmium atom · growth · Hordeum vulgare (barley)Results differ
42 papers in the same direction as this paper · 5 in the opposite direction
- negative
- positive
- positive
44 papers more in this group
See all 48 papers →cadmium atom · physiology: antioxidant enzymes · Hordeum vulgare (barley)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.