耕作与栽培2026，Vol.46Issue(5)：1-7,14,8.
外源咖啡酸处理对中国沙棘种子萌发的影响
Effects of Exogenous Caffeic Acid on Seed Germination of Hippophae Rhamnoides subsp.Sinensis Rousi
摘要
Abstract
To investigate the optimal concentration and underlying mechanism of exogenous caffeic acid on seed germination of Hippophae rhamnoides subsp.Sinensis Rousi,seeds collected from Xinglong Mountain were treated with different concen-trations(0,25,50,100,200,400 mg/L)of caffeic acid.The results showed that exogenous caffeic acid exhibited low-concentration promotion and high-concentration inhibition effect on seed germination.Low concentrations(25 mg/L and 50 mg/L)promoted germination during the critical period(days 5 to 7).The 25 mg/L treatment yielded the highest germination potential on day 5,with notable improvements in germination uniformity and radicle growth.The 50 mg/L treatment simulta-neously increased germination rate,germination potential,and fresh weight,while reducing the mean germination time.Both concentrations activated the antioxidant system,enhanced peroxidase activity,and maintained low malondialdehyde content.High concentrations(200 mg/L and 400 mg/L)inhibited seed germination,leading to a comprehensive decline in key germi-nation indices,suppressed peroxidase activity,and a sharp increase in malondialdehyde content.Except for the 50 mg/L treatment on day 6,which showed a significant difference from the control,no significant effects on seed dry weight were ob-served for other treatments.In conclusion,exogenous caffeic acid at concentrations of 25 mg/L and 50 mg/L promoted seed germination by enhancing antioxidant activity and alleviating oxidative damage,providing a basis for the application of exog-enous chemicals in seabuckthorn seedling cultivation.关键词
沙棘/咖啡酸/种子萌发/浓度效应/抗氧化Key words
Hippophae rhamnoides subsp.Sinensis Rousi/caffeic acid/seed germination/concentration effect/antioxidant分类
农业科技引用本文复制引用
赵婧,李铠,王荣辉,江璇..外源咖啡酸处理对中国沙棘种子萌发的影响[J].耕作与栽培,2026,46(5):1-7,14,8.基金项目
国家自然科学基金(32400190) （32400190）
国家自然科学基金(32060060) （32060060）
甘肃省科技计划重点研发计划(25YFFA061) （25YFFA061）
甘肃省和西北师范大学2024年人才培养质量提升项目,高等教育教学成果培育项目,以"寻·趣·研·用"桥接理论与实践——构建生物统计学与生命科学多学科交叉融合的创新教学体系 （）
