饲料研究2025，Vol.48Issue(6)：78-82,5.DOI:10.13557/j.cnki.issn1002-2813.2025.06.015
盐胁迫下外源过氧化氢对黄精种子萌发和幼苗生长的影响
Effect of exogenous hydrogen peroxide on seed germination and seedling growth of Polygonatum sibiricum under salt stress
摘要
Abstract
This study aimed to investigate the alleviating effects of exogenous hydrogen peroxide(H2O2)on the inhibition of Polygonatum sibiricum seed germination under salt stress.Using Polygonatum sibiricum seeds as experimental materials,the effects of different concentrations of exogenous H2O2 on seed germination,seedling growth,and physiological characteristics under 100 mmol/L NaCl stress were analyzed.The results showed that compared with blank control group(CK),100 mmol/L NaCl stress significantly decreased the germination rate and germinating potential of Polygonatum sibiricum seeds(P＜0.05),while increasing the concentrations of soluble sugar(SS),proline(PRO),and malondialdehyde(MDA),as well as the activities of superoxide dismutase(SOD),catalase(CAT),and peroxidase(POD)in seedlings(P＜0.05).Under 100 mmol/L NaCl stress,after soaking with exogenous H2O2 at 10 mmol/L,the germination rate,germination potential,germination index,vigor index,seedling root length,bud length,root fresh weight and bud fresh weight were significantly higher than those under NaCl stress(P＜0.05).The concentrations of SS and PRO and the activities of SOD,CAT and POD in root and bud were significantly higher than those under NaCl(P＜0.05),while the content of MDA was significantly lower than that under NaCl(P＜0.05).The study indicates that 10 mmol/L exogenous H2O2 soaked seeds significantly enhance the salt stress resistance of Polygonatum sibiricum seeds and seedlings.关键词
过氧化氢/盐胁迫/黄精种子/萌发/生理特性Key words
hydrogen peroxide/salt stress/Polygonatum sibiricum seeds/germination/physiological characteristics分类
农业科技引用本文复制引用
王志科,高佳佳,兰云,孙娟娟,覃蓓玲,刘灵霞..盐胁迫下外源过氧化氢对黄精种子萌发和幼苗生长的影响[J].饲料研究,2025,48(6):78-82,5.基金项目
甘肃省自然科学基金(项目编号:21JR11RM042) （项目编号:21JR11RM042）
甘肃省高等学校创新基金(项目编号:2022B-273) （项目编号:2022B-273）
陇东学院博士基金计划项目(项目编号:XYBY202007) （项目编号:XYBY202007）
