Abstract
Hydroponic culture was conducted to study the effect of Cd on the growth, metal accumulation and nitrogen metabolism in Brassica chinensis. The enzymatic activities of nitrogen metabolism including nitrate reductase (NR), glutamine synthetase (GS) and GS-transferase as well as the concentrations of chlorophyll, free proline, soluble protein, NO3(-) -N, NH4+ -N and nutrients in Brassica chinensis were determined. Results indicated that the addition of Cd reduced the content of the soluble protein and the accumulation of Cu, Ca, Fe and Mg, but promoted the P uptake. Low level of Cd (1 mg x L(-1)) could significantly increase the biomass and the content of chlorophyll of Brassica chinensis and the activities of NR, GS and GS-transferase when compared to control plants. However, when the Cd levels were above 2.5 mg x L(-1) in the culture medium, the activities of these enzymes were inhibited. Accordingly, the contents of NO3(-) -N, NH4+ -N, free proline and the activity of protease in the leaf of Brassica chinensis increased significantly. These results suggested that Cd addition could interfere with the assimilation of N in Brassica chinensis. The increase of free proline might alleviate the toxicity of ammonium in Brassica chinensis.
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Claims 16
Claim · model-written summary
Cd reduced soluble protein in Brassica chinensis.
Not reportedTaxonComparator
Verbatim
e0“Results indicated that the addition of Cd reduced the content of the soluble protein and the accumulation of Cu, Ca, Fe and Mg, but promoted the P uptake.”
Claim · model-written summary
Cd reduced Cu in Brassica chinensis.
Not reportedTaxonComparator
Verbatim
e0“Results indicated that the addition of Cd reduced the content of the soluble protein and the accumulation of Cu, Ca, Fe and Mg, but promoted the P uptake.”
Claim · model-written summary
Cd reduced Ca in Brassica chinensis.
Not reportedTaxonComparator
Verbatim
e0“Results indicated that the addition of Cd reduced the content of the soluble protein and the accumulation of Cu, Ca, Fe and Mg, but promoted the P uptake.”
Claim · model-written summary
Cd reduced Fe in Brassica chinensis.
Not reportedTaxonComparator
Verbatim
e0“Results indicated that the addition of Cd reduced the content of the soluble protein and the accumulation of Cu, Ca, Fe and Mg, but promoted the P uptake.”
Claim · model-written summary
Cd reduced Mg in Brassica chinensis.
Not reportedTaxonComparator
Verbatim
e0“Results indicated that the addition of Cd reduced the content of the soluble protein and the accumulation of Cu, Ca, Fe and Mg, but promoted the P uptake.”
Claim · model-written summary
Cd promoted P uptake.
Not reportedTaxonComparator
Verbatim
e0“Results indicated that the addition of Cd reduced the content of the soluble protein and the accumulation of Cu, Ca, Fe and Mg, but promoted the P uptake.”
Claim · model-written summary
Low Cd significantly increased biomass relative to control plants.
- Taxon
- Brassica chinensis
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Brassica rapa subsp. chinensise0 - Treatment
- Cd (1 mg x L(-1))e0
- Outcome
- biomasse0
- Direction
- increasee0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Low level of Cd (1 mg x L(-1)) could significantly increase the biomass and the content of chlorophyll of Brassica chinensis and the activities of NR, GS and GS-transferase when compared to control plants.”
Claim · model-written summary
Low Cd significantly increased content of chlorophyll relative to control plants.
- Taxon
- Brassica chinensisBrassica rapa subsp. chinensise0
- Treatment
- Cd (1 mg x L(-1))e0
- Outcome
- content of chlorophylle0
- Direction
- increasee0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low level of Cd (1 mg x L(-1)) could significantly increase the biomass and the content of chlorophyll of Brassica chinensis and the activities of NR, GS and GS-transferase when compared to control plants.”
Claim · model-written summary
Low Cd significantly increased activities of NR, GS and GS-transferase relative to control plants.
- Taxon
- Brassica chinensisBrassica rapa subsp. chinensise0
- Treatment
- Cd (1 mg x L(-1))e0
- Outcome
- activities of NR, GS and GS-transferasee0
- Direction
- increasee0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low level of Cd (1 mg x L(-1)) could significantly increase the biomass and the content of chlorophyll of Brassica chinensis and the activities of NR, GS and GS-transferase when compared to control plants.”
Claim · model-written summary
Cd levels above 2.5 mg x L(-1) inhibited the nitrogen metabolism enzymes.
- Treatment
- Cd levels were above 2.5 mg x L(-1)e0
- Outcome
- activities of these enzymese0
- Direction
- inhibitede0
Not reportedTaxonComparator
Verbatim
e0“However, when the Cd levels were above 2.5 mg x L(-1) in the culture medium, the activities of these enzymes were inhibited.”
Claim · model-written summary
NO3(-) -N increased significantly in leaves.
- Taxon
- Brassica chinensisBrassica rapa subsp. chinensise0
- Organ / stage
- leafe0
- Outcome
- NO3(-) -Ne0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Accordingly, the contents of NO3(-) -N, NH4+ -N, free proline and the activity of protease in the leaf of Brassica chinensis increased significantly.”
Claim · model-written summary
NH4+ -N increased significantly in leaves.
- Taxon
- Brassica chinensisBrassica rapa subsp. chinensise0
- Organ / stage
- leafe0
- Outcome
- NH4+ -Ne0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Accordingly, the contents of NO3(-) -N, NH4+ -N, free proline and the activity of protease in the leaf of Brassica chinensis increased significantly.”
Claim · model-written summary
free proline increased significantly in leaves.
- Taxon
- Brassica chinensisBrassica rapa subsp. chinensise0
- Organ / stage
- leafe0
- Outcome
- free prolinee0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Accordingly, the contents of NO3(-) -N, NH4+ -N, free proline and the activity of protease in the leaf of Brassica chinensis increased significantly.”
Claim · model-written summary
activity of protease increased significantly in leaves.
- Taxon
- Brassica chinensisBrassica rapa subsp. chinensise0
- Organ / stage
- leafe0
- Outcome
- activity of proteasee0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Accordingly, the contents of NO3(-) -N, NH4+ -N, free proline and the activity of protease in the leaf of Brassica chinensis increased significantly.”
Claim · model-written summary
Cd addition may interfere with N assimilation.
- Taxon
- Brassica chinensisBrassica rapa subsp. chinensise0
- Treatment
- Cd additione0
- Outcome
- assimilation of Ne0
- Direction
- interferee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results suggested that Cd addition could interfere with the assimilation of N in Brassica chinensis.”
Claim · model-written summary
Increased free proline might alleviate ammonium toxicity.
- Taxon
- Brassica chinensisBrassica rapa subsp. chinensise0
- Compound
- free prolinee0
- Outcome
- toxicity of ammoniume0
- Direction
- alleviatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase of free proline might alleviate the toxicity of ammonium in Brassica chinensis.”
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See all 9 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.