Abstract
Wheat seedlings were grown in presence of CdCl2 (0-200 µM) and Pb(NO3)2 (0-2000 µM) separately. The growth of metal-treated seedlings was significantly depressed. The activities of antioxidative enzymes namely superoxide dismutase (SOD), catalase (CAT) and guaiacol peroxidase (POX) were altered both in root and shoot tissues of 7-d-old seedlings. Under Cd stress, SOD activity in roots was undetectable even at the lowest Cd concentration (50 µM) whereas in shoots it declined sharply with increasing Cd levels. The activity of CAT declined to a greater extent in roots than in shoots. Even though the POX activity increased nine times in shoots, a decreasing trend was observed in root tissues due to Cd stress. Under Pb stress, the induction in SOD activity and decline in CAT activity were sharper in root tissues than in their shoot counterparts. The POX activity increased both in roots and shoots under Pb stress. Malondialdehyde concentration increased in both roots and shoots of Cd- and Pb-treated seedlings. The results suggest that metal toxicity was associated with oxidative stress. The decline in CAT activity may be the probable reason behind the Cd- and Pb-induced oxidative stress, since the alterations in SOD and POX activities showed different trends under these metal stresses.
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Claims 12
Claim · model-written summary
Metal treatment significantly depressed wheat seedling growth.
- Taxon
- Wheat
Triticum aestivume1 - Treatment
- metal-treatede0
- Outcome
- growthe0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth of metal-treated seedlings was significantly depressed.”
e1“Wheat seedlings were grown in presence of CdCl2 (0-200 µM) and Pb(NO3)2 (0-2000 µM) separately.”
Claim · model-written summary
Cadmium made root SOD activity undetectable at 50 µM.
- Taxon
- WheatTriticum aestivume1
- Organ / stage
- rootse0
- Treatment
- Cd stresse0
- Gene
- SODe0
- Outcome
- SOD activity in roots was undetectablee0
- Value
- 50 µMe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Cd stress, SOD activity in roots was undetectable even at the lowest Cd concentration (50 µM)”
e1“Wheat seedlings”
Claim · model-written summary
Shoot SOD activity declined sharply as cadmium level increased.
- Taxon
- WheatTriticum aestivume2
- Organ / stage
- shootse0
- Treatment
- Cd levelse0
- Gene
- SODe1
- Outcome
- SOD activitye1
- Direction
- declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in shoots it declined sharply with increasing Cd levels”
e1“SOD activity in roots”
e2“Wheat seedlings”
Claim · model-written summary
Cadmium depressed CAT activity more in roots than shoots.
- Taxon
- WheatTriticum aestivume2
- Organ / stage
- rootse0
- Treatment
- Cd stresse1
- Gene
- CATe0
- Outcome
- activity of CATe0
- Direction
- declinede0
- Comparator
- shootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of CAT declined to a greater extent in roots than in shoots.”
e1“Under Cd stress”
e2“Wheat seedlings”
Claim · model-written summary
Cadmium increased POX activity ninefold in shoots.
- Taxon
- WheatTriticum aestivume2
- Organ / stage
- shootse0
- Treatment
- Cd stresse1
- Gene
- POXe0
- Outcome
- POX activitye0
- Direction
- increasede0
- Value
- nine timese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POX activity increased nine times in shoots”
e1“due to Cd stress”
e2“Wheat seedlings”
Claim · model-written summary
Cadmium decreased POX activity in roots.
- Taxon
- WheatTriticum aestivume2
- Organ / stage
- root tissuese0
- Treatment
- Cd stresse0
- Gene
- POXe1
- Outcome
- POX activitye1
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decreasing trend was observed in root tissues due to Cd stress”
e1“POX activity increased nine times in shoots”
e2“Wheat seedlings”
Claim · model-written summary
Lead induced SOD activity more sharply in roots than shoots.
- Taxon
- WheatTriticum aestivume1
- Organ / stage
- root tissuese0
- Treatment
- Pb stresse0
- Gene
- SODe0
- Outcome
- SOD activitye0
- Direction
- inductione0
- Comparator
- shoot counterpartse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Pb stress, the induction in SOD activity and decline in CAT activity were sharper in root tissues than in their shoot counterparts.”
e1“Wheat seedlings”
Claim · model-written summary
Lead depressed CAT activity more sharply in roots than shoots.
- Taxon
- WheatTriticum aestivume1
- Organ / stage
- root tissuese0
- Treatment
- Pb stresse0
- Gene
- CATe0
- Outcome
- CAT activitye0
- Direction
- declinee0
- Comparator
- shoot counterpartse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Pb stress, the induction in SOD activity and decline in CAT activity were sharper in root tissues than in their shoot counterparts.”
e1“Wheat seedlings”
Claim · model-written summary
Lead increased POX activity in both roots and shoots.
- Taxon
- WheatTriticum aestivume1
- Organ / stage
- roots and shootse0
- Treatment
- Pb stresse0
- Gene
- POXe0
- Outcome
- POX activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The POX activity increased both in roots and shoots under Pb stress.”
e1“Wheat seedlings”
Claim · model-written summary
Cadmium and lead increased malondialdehyde concentration in roots and shoots.
- Taxon
- WheatTriticum aestivume1
- Organ / stage
- roots and shootse0
- Treatment
- Cd- and Pb-treatede0
- Outcome
- Malondialdehyde concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Malondialdehyde concentration increased in both roots and shoots of Cd- and Pb-treated seedlings.”
e1“Wheat seedlings”
Claim · model-written summary
The authors associate metal toxicity with oxidative stress.
- Taxon
- WheatTriticum aestivume1
- Treatment
- metal toxicitye0
- Outcome
- oxidative stresse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“metal toxicity was associated with oxidative stress”
e1“Wheat seedlings”
Claim · model-written summary
The authors suggest CAT decline may contribute to cadmium and lead oxidative stress.
- Taxon
- WheatTriticum aestivume1
- Gene
- CATe0
- Outcome
- Cd- and Pb-induced oxidative stresse0
- Qualifier
- decline in CAT activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decline in CAT activity may be the probable reason behind the Cd- and Pb-induced oxidative stress”
e1“Wheat seedlings”
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