Abstract
Zinc (Zn) is considered as one of the heavy metal pollutants in soil affecting agriculture. Salicylic acid (SA) is an important phytohormone that can mitigate effects against various abiotic stresses in plants, however, its exploration to improve Zn stress tolerance in alfalfa plants is still elusive. Thus, in the present study, exogenous SA treatment was conducted on alfalfa plants under Zn stress. The effects of exogenous SA on the physiological effects of alfalfa plants and the expression levels related genes were studied. This study tested the biomass, relative water content, chlorophyll levels, photosynthetic capacity, proline and soluble sugar contents, detected the activity of antioxidant enzymes (such as peroxidase and superoxide dismutase), glutathione biosynthesis, and endogenous SA levels, and quantified the genes associated with the antioxidant system and glutathione metabolism-mediated Zn stress. The results showed that exogenous SA could elevate the physiological adaptability of alfalfa plants through enhancing photosynthesis, proline and soluble sugar levels, stimulating antioxidant system and glutathione metabolism, and inducing the transcription level of related genes, thereby diminishing oxidative stress, inhibiting excessive Zn accumulation of alfalfa plants, increasing tolerance to Zn stress, and reducing the toxicity of Zn. Collectively, the application of SA alleviates Zn toxicity in alfalfa plants. The findings gave first insights into the regulatory mechanism of the Zn stress tolerance of alfalfa by exogenous SA and this might have positive implications for managing other plants which are suffering Zn stress.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Exogenous SA enhanced photosynthesis in alfalfa under Zn stress.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- exogenous SAe0
- Outcome
- photosynthesise0
- Direction
- enhancinge0
- Qualifier
- Zn stresse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous SA could elevate the physiological adaptability of alfalfa plants through enhancing photosynthesis, proline and soluble sugar levels”
e1“increasing tolerance to Zn stress”
Claim · model-written summary
Exogenous SA enhanced proline and soluble sugar levels in alfalfa under Zn stress.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- exogenous SAe0
- Outcome
- proline and soluble sugar levelse0
- Direction
- enhancinge0
- Qualifier
- Zn stresse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous SA could elevate the physiological adaptability of alfalfa plants through enhancing photosynthesis, proline and soluble sugar levels”
e1“increasing tolerance to Zn stress”
Claim · model-written summary
Exogenous SA stimulated the antioxidant system and glutathione metabolism in alfalfa.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- exogenous SAe0
- Outcome
- antioxidant system and glutathione metabolisme0
- Direction
- stimulatinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous SA could elevate the physiological adaptability of alfalfa plants through enhancing photosynthesis, proline and soluble sugar levels, stimulating antioxidant system and glutathione metabolism”
Claim · model-written summary
Exogenous SA induced transcription of related genes in alfalfa.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- exogenous SAe2
- Outcome
- transcription level of related genese0
- Direction
- inducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inducing the transcription level of related genes”
e1“thereby diminishing oxidative stress, inhibiting excessive Zn accumulation of alfalfa plants”
e2“The results showed that exogenous SA could elevate”
Claim · model-written summary
Exogenous SA diminished oxidative stress in alfalfa.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- exogenous SAe1
- Outcome
- oxidative stresse0
- Direction
- diminishinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thereby diminishing oxidative stress, inhibiting excessive Zn accumulation of alfalfa plants, increasing tolerance to Zn stress, and reducing the toxicity of Zn”
e1“The results showed that exogenous SA could elevate”
Claim · model-written summary
Exogenous SA inhibited excessive Zn accumulation in alfalfa.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- exogenous SAe1
- Outcome
- excessive Zn accumulatione0
- Direction
- inhibitinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inhibiting excessive Zn accumulation of alfalfa plants”
e1“The results showed that exogenous SA could elevate”
Claim · model-written summary
Exogenous SA increased alfalfa tolerance to Zn stress.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- exogenous SAe1
- Outcome
- tolerance to Zn stresse0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“alfalfa plants, increasing tolerance to Zn stress, and reducing the toxicity of Zn”
e1“The results showed that exogenous SA could elevate”
The same questions in other papers
salicylic acid · physiology: oxidative · Medicago sativa (alfalfa)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
salicylic acid · molecular: metabolites · Medicago sativa (alfalfa)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
salicylic acid · physiology: osmolytes · Medicago sativa (alfalfa)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
salicylic acid · disease · Medicago sativa (alfalfa)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →salicylic acid · molecular: expression · Medicago sativa (alfalfa)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 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.