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Exogenous melatonin enhances heat tolerance in buckwheat seedlings by modulating physiological response mechanisms.
Plant Physiol Biochem
January 2025
Groupe de Recherche en Physiologie Végétale, Earth and Life Institute, Université Catholique de Louvain-UCLouvain, Louvain-la-Neuve, Belgium.
Melatonin (MT) serves as a potent antioxidant in plant organisms, bolstering their resilience to temperature stress. In this study, the impact of MT on various buckwheat varieties under high-temperature stress conditions (40 °C) was investigated. Specifically, five buckwheat seedling varieties, comprising three sweet buckwheat variants (Fagopyrum esculentum) and two bitter buckwheat types (Fagopyrum tataricum), were subjected to foliar sprays of melatonin at concentrations of 50, 100 and 200 μM, with water at 25 °C employed as a control.
View Article and Find Full Text PDFFirst report of foliar blight of castor bean caused by in Sinaloa, Mexico.
Plant Dis
December 2024
Universidad Autónoma de Occidente, CIENCIAS NATURALES Y EXACTAS , Carret. Internacional y Boulevard Macario Gaxiola, S/N, Los Mochis, Los Mochis, Sinaloa, Mexico, 81200.
Article Synopsis
- Castor bean, known scientifically as Ricinus communis, is grown for its oil and ornamental purposes, particularly for its attractive foliage, and has naturalized in places like Sinaloa, Mexico.
- A 2019 survey found that wild castor bean in Sinaloa was significantly impacted by a foliar blight resembling that caused by the fungus Alternaria ricini, with disease incidence varying between 20% to 60% across different sites.
- Samples collected revealed that long-beaked Alternaria was present in 60% to 70% of the leaf fragments tested, with distinct morphological characteristics aligning with descriptions of A. ricini, indicating a potential link between the disease observed in Sinaloa and previously noted occurrences in the
Tomato sprayed monocalcium phosphate had production-phytoremediation dual function with high soil Cd extraction and safer fruit production.
Environ Pollut
November 2024
Institute of Plant Nutrition, Resources and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China. Electronic address:
In order to make use of the large biomass of tomato plant to fulfill the purpose of remediating-while-producing, two commercial tomato varieties, 'Baiguoqiangfeng' (BG) and 'Ouguan' (OG) were grown in Cd contaminated acidic soil to compare their performance on Cd phytoextraction, and monocalcium phosphate (Ca) was foliar applied to reduce their fruit Cd concentration. The results showed that the BG was a more Cd tolerant variety, comparing with OG, it suffered lighter tissue peroxidation and photosynthesis obstacle, owning weaker amino acid metabolism, secondary metabolism and stress signal transduction under Cd stress. The Ca application reduced its ABA level but increased the GSH, IAA, ZR and GA3 level, and enhanced its lysine degradation, tyrosine metabolism, alanine, asparagine and glutamate metabolism, plant hormone signal transduction and phenylpropanoid biosynthesis under Cd stress.
View Article and Find Full Text PDFMelatonin improves cadmium tolerance in Salix viminalis by enhancing amino acid and saccharide metabolism, and increasing polyphenols.
Ecotoxicol Environ Saf
December 2024
Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China. Electronic address:
As a short-rotation woody plant, Salix viminalis has the potential for phytoremediation of cadmium (Cd), but it has poor tolerance to high Cd concentrations. Melatonin (MEL), a candidate bio-promoter, was considered to play an active role in plant responses to Cd. However, the molecular mechanism by which MEL regulates metabolic processes in plants to defend against Cd stress remain unclear.
View Article and Find Full Text PDFContribution, absorption mode, and model prediction of atmospheric deposition to copper and lead accumulation in soybean.
Sci Total Environ
December 2024
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China. Electronic address:
Article Synopsis
- Atmospheric deposition significantly affects trace metal accumulation in crops, specifically in soybean plants, with newly deposited metals accounting for a substantial percentage of copper (Cu) and lead (Pb) accumulation despite their low contribution to total soil pools.
- The study found that the absorption of metals through leaves (foliar absorption) was a major pathway for Cu and Pb accumulation in soybean tissues, with varying contributions across different plant parts.
- Two predictive models were developed using multiple regression analysis to accurately forecast Cu and Pb concentrations in soybean seeds, demonstrating improved accuracy over single-variable models and identifying a threshold for safe Pb levels in soybean production.
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