山东农业科学2025，Vol.57Issue(1)：81-86,6.DOI:10.14083/j.issn.1001-4942.2025.01.011
外源水杨酸对干旱胁迫下黄精种子萌发和幼苗抗氧化酶活性的影响
Effect of Exogenous Salicylic Acid on Seed Germination and Antioxidant Enzyme Activity of Polygonatum sibiricum Seedlings under Drought Stress
摘要
Abstract
To investigate the mitigation effect of exogenous salicylic acid(SA)on germination inhibition of seed under drought stress,seeds of Polygonatum sibiricum were used as material in the test,and the effects of soaking seeds with 0.01,0.10,1.00 and 2.00 mmol/L SA on seed germination,seedling growth and physi-ological indices under 6％polyethylene glycol(PEG-6000)stress(PG)were studied.The results showed that PG treatment significantly inhibited the seed germination and seedling growth of P.sibiricum showing as the decrease of germination potential,germination index,viability index,as well as seedling bud length,root length and fresh weight.Soaking seed with the suitable concentration of SA that was 0.10 mmol/L significantly improved the germination potential,germination index and vitality index of P.sibiricum seeds under PEG stress,significantly promoted the growth of seedling buds and roots,significantly enhanced the activities of catalase(CAT),superoxide dismutase(SOD)and peroxidase(POD)in buds and roots,significantly reduced the malondialdehyde(MDA)content,and significantly increased the contents of proline and soluble sugar.In conclusion,the treatment of 0.10 mmol/L exogenous SA could significantly reduce the inhibitory effect of PEG stress on germination of P.sibiricum seeds,significantly improve the antioxidant enzyme activities of P.sibiri-cum seedlings to reduce the oxidative damage caused by drought stress,and effectively improve the drought re-sistance of P.sibiricum at seed germination and seedling growth stages.关键词
水杨酸/干旱胁迫/黄精/种子萌发/抗氧化酶Key words
Salicylic acid/Drought stress/Polygonatum sibiricum/Seed germination/Antioxidases分类
农业科技引用本文复制引用
王志科,刘灵霞..外源水杨酸对干旱胁迫下黄精种子萌发和幼苗抗氧化酶活性的影响[J].山东农业科学,2025,57(1):81-86,6.基金项目
甘肃省自然科学基金项目(21JR11RM042) （21JR11RM042）
甘肃省高等学校创新基金项目(2021B-273) （2021B-273）
陇东学院博士基金计划项目(XYBY202007) （XYBY202007）
