We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Exogenous spermine alleviates the negative effects of combined salinity and paraquat in tomato plants by decreasing stress-induced oxidative damage
Summary
Exogenous spermine application reduced leaf damage and improved photosynthetic function and growth of tomato plants under combined salinity and paraquat herbicide stress, with the protective effect attributed to decreased hydrogen peroxide and malondialdehyde accumulation.
Plants are frequently exposed to different combinations of soil constraints including salinity and different herbicides. These abiotic conditions negatively affect photosynthesis, growth and plant development resulting in limitations in agriculture production. To respond to these conditions, plants accumulate different metabolites that restore cellular homeostasis and are key for stress acclimation processes. In this work, we analyzed the role of exogenous spermine (Spm), a polyamine involved in plant tolerance to abiotic stress, in tomato responses to the combination of salinity (S) and the herbicide paraquat (PQ). Our findings showed that application of Spm reduced leaf damage and enhanced survival, growth, photosystem II function and photosynthetic rate of tomato plants subjected to the combination of S and PQ. In addition, we revealed that exogenous Spm reduced H2O2 and malondialdehyde (MDA) accumulation in plants subjected to S+PQ, suggesting that the role of exogenous Spm in alleviating the negative effects of this stress combination could be attributed to a decrease in stress-induced oxidative damage in tomato plants. Taken together, our results identify a key role for Spm in improving plant tolerance to combined stress.
Sign in to start a discussion.
More Papers Like This
Dopamine and 24-Epibrassinolide Upregulate Root Resilience, Mitigating Lead Stress on Leaf Tissue and Stomatal Performance in Tomato Plants
Dopamine and 24-epibrassinolide—applied alone or together—mitigated lead-induced stress in tomato plants by upregulating root resilience and improving stomatal performance, suggesting these compounds could help protect crops in lead-contaminated agricultural soils.
Involvement of Nitric Oxide and Melatonin Enhances Cadmium Resistance of Tomato Seedlings through Regulation of the Ascorbate–Glutathione Cycle and ROS Metabolism
Researchers found that melatonin and nitric oxide work together to enhance cadmium stress tolerance in tomato seedlings, with melatonin acting partly through nitric oxide signaling to reduce oxidative damage and support seedling growth under heavy metal stress.
Exogenously Applied Sodium Nitroprusside Alleviated Cadmium Toxicity in Different Aromatic Rice Cultivars by Improving Nitric Oxide Accumulation and Modulating Oxidative Metabolism
Researchers investigated whether spraying sodium nitroprusside, a compound that releases nitric oxide, could help aromatic rice plants cope with cadmium-contaminated soil. They found that the treatment reduced oxidative stress markers in the plants and improved photosynthesis, yield, and grain quality across three rice varieties. The study suggests that nitric oxide supplementation may offer a practical approach for growing rice more safely in heavy metal-polluted agricultural areas.
Effects of urban atmospheric particulate matter on higher plants using Lycopersicon esculentum as model species
Tomato plants exposed to aqueous extracts of urban atmospheric particulate matter showed dose-dependent reductions in biomass and chlorophyll content, with higher doses causing clear phytotoxic effects and protein content paradoxically increasing at intermediate doses, suggesting that PM-associated nutrient content initially offsets chemical stress at lower concentrations.
Melatonin enhances salt tolerance in sorghum by modulating photosynthetic performance, osmoregulation, antioxidant defense, and ion homeostasis
Exogenous melatonin application was found to enhance salt tolerance in sorghum by improving photosynthetic performance and modulating antioxidant responses during salt stress. The findings suggest melatonin could be a practical tool for improving crop resilience under salinity conditions.