Fulvic Acid Enhances Oat Growth and Grain Yield Under Drought Deficit by Regulating Ascorbate–Glutathione Cycle, Chlorophyll Synthesis, and Carbon–Assimilation Ability

Agronomy, Год журнала: 2025, Номер 15(5), С. 1153 - 1153

Опубликована: Май 9, 2025

Drought deficit inhibits oat growth and yield. Fulvic acid (FA) can enhance plant stress tolerance, but its effects on regulating the ascorbate–glutathione cycle, chlorophyll synthesis, carbon–assimilation ability remain unclear. Therefore, this study aimed to elucidate physiological mechanisms of FA regulation drought tolerance in oats relationship with yield using drought-resistant variety Yanke 2 drought-sensitive Bayou 9. The yield, antioxidant system, capacity under were investigated by systematically assessing changes morphogenesis, intermediates, enzyme activities, carbohydrate metabolism. results showed that stress, treatment significantly promoted (leaf area, dry matter) elevated glutathione peroxidase, ascorbate reductase, dehydroascorbate reductase reduced ascorbic acid, content. In addition, increased chlorophyll, as well magnesium protoporphyrin IX, protochlorophyllin ester content, enhanced 1,5-bisphosphate ribulose carboxylase, carboxylase enzyme, 1,7-bisphosphate sestamibiose heptulose esterase, 1,6-bisphosphate fructose aldolase, sucrose synthase, phosphate invertase, neutral invertase sucrose, glucose, Overall, fulvic alleviates drought-induced damage enhancing promoting biosynthesis, improving carbon assimilation (Yanke 2) was more effective application compared (Bayou 9). This research provides valuable insight into potential a biostimulant abiotic stress.

Язык: Английский

Investigating the mechanism of auxin-mediated fulvic acid-regulated root growth in Oryza sativa through physiological and transcriptomic analyses

Planta, Год журнала: 2024, Номер 261(1)

Опубликована: Дек. 10, 2024

Язык: Английский