Frontiers in plant science · 2026
Impaired antioxidant defense associated with flavonoid biosynthesis reprogramming in the mangrove Acanthus ilicifolius under high salinity.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Xiong Qingfan, Sun Zhengzheng, Su Lin, You Yilai, Chen Chao
Аннотация
INTRODUCTION: This study investigates how varying salinity levels influence the physiological and metabolic responses of the mangrove plant Acanthus ilicifolius, aiming to clarify its salt adaptation mechanisms.
METHODS: Field experiments were conducted at three sites with stable salinity conditions (approximately 0.73, 2.26, and 3.09 g/L), combined with physiological assays, metabolomics, and transcriptomics.
RESULTS: Increasing salinity elevated intracellular reactive oxygen species, reduced antioxidant enzyme activity, and aggravated membrane lipid peroxidation. Metabolomics revealed that medium salinity primarily affected terpenoid (18.7%) and lipid (14.5%) metabolism, while high salinity regulated flavonoid (11%) and terpenoid (16.4%) biosynthesis. Transcriptomic data indicated that the antioxidant defense system plays a central role in mitigating oxidative stress, with WRKY and AP2/ERF transcription factors significantly upregulated under high salinity, enhancing kaempferol-flavanone isomerase activity and flavonoid accumulation (e.g., hesperidin).
DISCUSSION: These findings show that A. ilicifolius compensates for impaired antioxidant defenses by redirecting metabolism toward flavonoid synthesis, providing novel insights into the molecular basis of mangrove salt tolerance and its potential medicinal applications.
METHODS: Field experiments were conducted at three sites with stable salinity conditions (approximately 0.73, 2.26, and 3.09 g/L), combined with physiological assays, metabolomics, and transcriptomics.
RESULTS: Increasing salinity elevated intracellular reactive oxygen species, reduced antioxidant enzyme activity, and aggravated membrane lipid peroxidation. Metabolomics revealed that medium salinity primarily affected terpenoid (18.7%) and lipid (14.5%) metabolism, while high salinity regulated flavonoid (11%) and terpenoid (16.4%) biosynthesis. Transcriptomic data indicated that the antioxidant defense system plays a central role in mitigating oxidative stress, with WRKY and AP2/ERF transcription factors significantly upregulated under high salinity, enhancing kaempferol-flavanone isomerase activity and flavonoid accumulation (e.g., hesperidin).
DISCUSSION: These findings show that A. ilicifolius compensates for impaired antioxidant defenses by redirecting metabolism toward flavonoid synthesis, providing novel insights into the molecular basis of mangrove salt tolerance and its potential medicinal applications.