Abstract
The research aimed to verify the important physiological effect of nitrogen (N) on plants exposed to cadmium (Cd). The poplar plants were grown in a Hoagland nutrient solution and treated with extra N, Cd, and N + Cd. After treatment, plant growth and chlorophyll content were recorded. The oxidative stress, the activity of antioxidant enzymes, and the expression of related genes were also examined. The results indicated the plants treated with sole Cd presented obvious toxicity symptoms, i.e. growth inhibition, reactive oxygen species accumulation, and chlorophyll content decrement. However, when N was added to the plants under Cd stress, plant growth was enhanced, chlorophyll synthesis was promoted, and the oxidative stress was alleviated. Further, the expression of antioxidant enzymes genes was upregulated by N. The results indicated that N partially reversed the toxic effect of Cd on poplar plants, which can provide new methodology to enhance the phytoremediation technology for heavy metal pollution soil.
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Claims 7
Claim · model-written summary
Cadmium alone inhibited poplar growth.
PopulusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Schema note from the model: Taxon named in abstract elsewhere
Verbatim
e0“plants treated with sole Cd presented obvious toxicity symptoms, i.e. growth inhibition, reactive oxygen species accumulation, and chlorophyll content decrement”
t0“Populus”
Claim · model-written summary
Cadmium alone caused reactive oxygen species accumulation.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants treated with sole Cd presented obvious toxicity symptoms, i.e. growth inhibition, reactive oxygen species accumulation, and chlorophyll content decrement”
t0“Populus”
Claim · model-written summary
Cadmium alone decreased chlorophyll content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants treated with sole Cd presented obvious toxicity symptoms, i.e. growth inhibition, reactive oxygen species accumulation, and chlorophyll content decrement”
t0“Populus”
Claim · model-written summary
Nitrogen enhanced growth under cadmium stress.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when N was added to the plants under Cd stress, plant growth was enhanced”
t0“Populus”
Claim · model-written summary
Nitrogen promoted chlorophyll synthesis under cadmium stress.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when N was added to the plants under Cd stress, plant growth was enhanced, chlorophyll synthesis was promoted”
t0“Populus”
Claim · model-written summary
Nitrogen alleviated oxidative stress under cadmium stress.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when N was added to the plants under Cd stress, plant growth was enhanced, chlorophyll synthesis was promoted, and the oxidative stress was alleviated”
t0“Populus”
Claim · model-written summary
Nitrogen upregulated antioxidant enzyme gene expression.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the expression of antioxidant enzymes genes was upregulated by N”
t0“Populus”
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