Exogenous jasmonic acid alleviates Cu-induced damages in guinea grass by enhancing photosynthesis, antioxidant enzyme activity and modifying associated metabolites
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View abstract on PubMed
Summary
This summary is machine-generated.Exogenous Jasmonic acid (JA) mitigates copper (Cu) toxicity in guinea grass by boosting antioxidant enzymes and photosynthetic efficiency. This enhances plant growth and biomass, showing potential for phytoremediation of Cu-stressed environments.
Area Of Science
- Plant Science
- Environmental Science
- Biochemistry
Background
- Copper (Cu) is an essential micronutrient but toxic at high concentrations, impairing plant growth and physiological functions.
- Guinea grass (<i>Panicum maximum</i>) is a vital forage crop susceptible to heavy metal stress.
- Jasmonic acid (JA) is a plant hormone involved in stress responses.
Purpose Of The Study
- To investigate the role of exogenous Jasmonic acid (JA) in detoxifying copper (Cu) stress in guinea grass (<i>Panicum maximum</i>).
- To elucidate the physiological and metabolic mechanisms underlying JA-mediated Cu detoxification.
Main Methods
- Guinea grass seedlings were subjected to Cu stress (300 µM) and exogenous JA treatment (10 µM) in controlled growth chambers for 30 days.
- Physiological parameters including chlorophyll content, net photosynthetic rate (Pn), and antioxidant enzyme activities were measured.
- Metabolomic analysis was performed to identify differentially accumulated metabolites.
Main Results
- Cu stress significantly reduced chlorophyll content, Pn, antioxidant enzyme activities, and biomass.
- Exogenous JA application effectively mitigated Cu toxicity, increasing chlorophyll, Pn (+107%), biomass (+84.7%), and antioxidant enzyme activities.
- Metabolomic profiling revealed significant alterations in amino acids, organic acids, and carbohydrates, with JA modulating pathways like the citrate cycle.
Conclusions
- Exogenous Jasmonic acid (JA) plays a crucial role in alleviating copper (Cu) toxicity in guinea grass.
- JA enhances photosynthetic efficiency, antioxidant capacity, and modifies metabolic pathways to improve plant tolerance to Cu stress.
- Guinea grass treated with JA shows significant potential for phytoremediation of Cu-contaminated soils.
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