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• W4280521346 endingPage "5749" @default.
• W4280521346 startingPage "5749" @default.
• W4280521346 abstract "Glutathione peroxidases (GPXs) are important antioxidant enzymes in animals. Plants contain GPX-like (GPXL) enzymes, which—in contrast to GPXs—contain cysteine in their active site instead of selenocysteine. Although several studies proved their importance in development and stress responses, their interaction with ethylene (ET) signalling is not known. Our aim was to investigate the involvement of AtGPXL5 in ET biosynthesis and/or signalling using Atgpxl5 mutant and AtGPXL5 cDNA-overexpressing (OX-AtGPXL5) lines. Four-day-old dark-grown Atgpxl5 seedlings had shorter hypocotyls and primary roots, while OX-AtGPXL5 seedlings exhibited a similar phenotype as wild type under normal conditions. Six-week-old OX-AtGPXL5 plants contained less H2O2 and malondialdehyde, but higher polyamine and similar ascorbate- and glutathione contents and redox potential (EGSH) than the Col-0. One-day treatment with the ET-precursor 1-aminocyclopropane-1-carboxylic acid (ACC) induced the activity of glutathione- and thioredoxin peroxidases and some other ROS-processing enzymes. In the Atgpxl5 mutants, the EGSH became more oxidised; parallelly, it produced more ethylene after the ACC treatment than other genotypes. Although the enhanced ET evolution measured in the Atgpxl5 mutant can be the result of the increased ROS level, the altered expression pattern of ET-related genes both in the Atgpxl5 and OX-AtGPXL5 plants suggests the interplay between AtGPXL5 and ethylene signalling." @default.
• W4280521346 created "2022-05-22" @default.
• W4280521346 creator A5014829684 @default.
• W4280521346 creator A5022629999 @default.
• W4280521346 creator A5029628254 @default.
• W4280521346 creator A5046051285 @default.
• W4280521346 creator A5048533839 @default.
• W4280521346 creator A5062325965 @default.
• W4280521346 creator A5074868982 @default.
• W4280521346 creator A5075068033 @default.
• W4280521346 creator A5091159837 @default.
• W4280521346 date "2022-05-20" @default.
• W4280521346 modified "2023-10-10" @default.
• W4280521346 title "Crosstalk between the Arabidopsis Glutathione Peroxidase-Like 5 Isoenzyme (AtGPXL5) and Ethylene" @default.
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