Abstract
Mercury (Hg) pollution has led to a serious decline in crop yields. Methyl jasmonate (MJ), as a plant hormone, regulates plant responses to heavy metal stress. Nonetheless, the pathways by which MJ modulates Hg tolerance in plants are still not well elucidated. Our study aimed to elucidate the positive impacts of MJ in alleviating Hg-induced toxicity in maize (Zea mays L.) seedlings using an integrated approach combining physiological assessments and transcriptomic analysis. The findings indicated that exogenous MJ mitigated Hg-induced inhibition of photosynthetic performance by up-regulating photosynthesis-related and light-harvesting-related genes and increasing chlorophyll content. Under Hg stress, MJ enhances proline accumulation in maize seedlings by up-regulating essential genes in the proline biosynthesis pathway and down-regulating critical genes in the proline degradation pathway. MJ also elevates the expression of key enzymes involved in phenylpropanoid biosynthesis in maize seedlings, decreases malondialdehyde (MDA) content, and enhances root vitality. In addition, MJ may exert a detoxification effect on maize seedlings under Hg stress by regulating the expression of various genes linked to basic nutrient transport proteins, as well as those involved in the transport, influx, and distribution of metal ions. These findings indicate that MJ is essential for enhancing plant tolerance to Hg stress, thereby establishing a theoretical framework for the advancement and utilization of environmentally friendly agricultural methods involving plant hormones.
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Claims 10
Claim · model-written summary
Exogenous methyl jasmonate alleviated mercury inhibition of photosynthetic performance.
Not reportedTaxonComparator
Verbatim
e0“exogenous MJ mitigated Hg-induced inhibition of photosynthetic performance”
Claim · model-written summary
Methyl jasmonate upregulated photosynthesis and light-harvesting genes.
Zea maysNot reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Seedlings”
e0“up-regulating photosynthesis-related and light-harvesting-related genes”
Claim · model-written summary
Methyl jasmonate increased chlorophyll content under mercury stress.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Seedlings”
e0“increasing chlorophyll content”
Claim · model-written summary
Methyl jasmonate increased proline accumulation under mercury stress.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Hg stress, MJ enhances proline accumulation in maize seedlings”
Claim · model-written summary
Methyl jasmonate upregulated proline biosynthesis genes.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MJ enhances proline accumulation in maize seedlings by up-regulating essential genes in the proline biosynthesis pathway”
Claim · model-written summary
Methyl jasmonate downregulated proline degradation genes.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MJ enhances proline accumulation in maize seedlings by up-regulating essential genes in the proline biosynthesis pathway and down-regulating critical genes in the proline degradation pathway.”
Claim · model-written summary
Methyl jasmonate increased expression of enzymes involved in phenylpropanoid biosynthesis.
- Treatment
- MJe0
- Outcome
- expression of key enzymes involved in phenylpropanoid biosynthesise0
- Direction
- elevatese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MJ also elevates the expression of key enzymes involved in phenylpropanoid biosynthesis in maize seedlings”
Claim · model-written summary
Methyl jasmonate decreased malondialdehyde content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MJ also elevates the expression of key enzymes involved in phenylpropanoid biosynthesis in maize seedlings, decreases malondialdehyde (MDA) content”
Claim · model-written summary
Methyl jasmonate enhanced root vitality.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MJ also elevates the expression of key enzymes involved in phenylpropanoid biosynthesis in maize seedlings, decreases malondialdehyde (MDA) content, and enhances root vitality.”
Claim · model-written summary
Methyl jasmonate may detoxify mercury-stressed maize by regulating nutrient and metal ion transport genes.
- Gene
- genes linked to basic nutrient transport proteinse0
- Outcome
- detoxification effecte0
- Qualifier
- under Hg stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MJ may exert a detoxification effect on maize seedlings under Hg stress by regulating the expression of various genes linked to basic nutrient transport proteins, as well as those involved in the transport, influx, and distribution of metal ions.”
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