Abstract
Abstract Nitrate assimilation in higher plants is the main biosynthetic pathway leading to glutamate, required for synthesis of some metabolites that participate in mechanisms of biochemical adaptation to heavy metal such as cadmium. Seven day—old seedlings were grown for 14 days on hydroponic culture medium containing 2 mM or 5 mM of nitrate. Cadmium was added at 25 μM concentration. The supply of nitrate at an important concentration (5 mM) enhanced growth activity and nitrate content in leaves and roots. In parallel, nitrate and nitrite reductase activities were induced. Regardless the nitrate concentration, presence of cadmium (25 μM) exerted an inhibitory effect on plant growth, nitrate content, nitrate and nitrite reductase activities. This negative effect was more important when nitrate was added at 2 mM concentration. Aminating GDH activity was enhanced by the presence of cadmium in order to detoxify ammonium. Our results suggest that tomato plant was more sensitive to cadmium toxicity when received a low nitrogen concentration (nitrate).
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Claims 8
Claim · model-written summary
5 mM nitrate enhanced tomato growth activity.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- 5 mMe0
- Outcome
- growth activitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The supply of nitrate at an important concentration (5 mM) enhanced growth activity and nitrate content in leaves and roots.”
t0“tomato”
Claim · model-written summary
5 mM nitrate enhanced leaf and root nitrate content.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 5 mMe0
- Outcome
- nitrate content in leaves and rootse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The supply of nitrate at an important concentration (5 mM) enhanced growth activity and nitrate content in leaves and roots.”
t0“tomato”
Claim · model-written summary
Nitrate supply induced nitrate and nitrite reductase activities.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- nitratee0
- Outcome
- nitrate and nitrite reductase activitiese0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In parallel, nitrate and nitrite reductase activities were induced.”
t0“tomato”
Claim · model-written summary
Cadmium inhibited tomato plant growth.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- cadmium (25 μM)e0
- Outcome
- plant growthe0
- Direction
- inhibitorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regardless the nitrate concentration, presence of cadmium (25 μM) exerted an inhibitory effect on plant growth, nitrate content, nitrate and nitrite reductase activities.”
t0“tomato”
Claim · model-written summary
Cadmium inhibited tomato nitrate content.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- cadmium (25 μM)e0
- Outcome
- nitrate contente0
- Direction
- inhibitorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regardless the nitrate concentration, presence of cadmium (25 μM) exerted an inhibitory effect on plant growth, nitrate content, nitrate and nitrite reductase activities.”
t0“tomato”
Claim · model-written summary
Cadmium inhibited tomato nitrate and nitrite reductase activities.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- cadmium (25 μM)e0
- Outcome
- nitrate and nitrite reductase activitiese0
- Direction
- inhibitorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regardless the nitrate concentration, presence of cadmium (25 μM) exerted an inhibitory effect on plant growth, nitrate content, nitrate and nitrite reductase activities.”
t0“tomato”
Claim · model-written summary
Cadmium inhibition was greater with 2 mM nitrate.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 2 mMe0
- Outcome
- negative effecte0
- Direction
- more importante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This negative effect was more important when nitrate was added at 2 mM concentration.”
t0“tomato”
Claim · model-written summary
Cadmium enhanced aminating GDH activity.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- cadmiume0
- Gene
- GDHe0
- Outcome
- Aminating GDH activitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aminating GDH activity was enhanced by the presence of cadmium in order to detoxify ammonium.”
t0“tomato”
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