种子2025，Vol.44Issue(4)：26-33,8.DOI:10.16590/j.cnki.1001-4705.2025.04.026
外源纳米硅对盐胁迫下辣椒种子萌发及生理指标的影响
Effects of Exogenous Silicon Nanosilicon on Seed Germination and Physiological Indicators of Capsicum annuum Seeds under Salt Stress
摘要
Abstract
To study the effect of exogenous silica nanoparticles(SiNPs)on the germination of Capsicum annuum seeds under salt stress,the Capsicum annuum(Guifei)seeds were used as test materials,and four treatments including a control(ck),SiNP250(250 mg/L),NaCl(200 mmol/L),and NaCl+SiNP250 were set up.The seed coats of Capsicum annuum in different treatments were observed by scanning electron microscopy to analyze the effects of exogenous SiNP250 on the germina-tion of Capsicum annuum seeds,the accumulation of reactive oxygen species(ROS),the activity of antioxidant enzymes and the content of osmotic regulatory substances under salt stress.The results showed that salt stress significantly inhibited the germination of Capsicum annuum seeds.However,under salt stress,exogenous SiNP250 treatment could reduce the degree of Capsicum annuum seed coat rupture,promote seed germination,and decrease hydrogen peroxide(H2O2)and superoxide anion radicals(O2·-),the content of malondialdehyde(MDA)and malondialdehyde decreased the activity of antioxidant enzymes in Capsicum annuum radicles and reduced the content of proline(Pro)and sol-uble protein(SP),and the relative expression levels of the ABA dissociation related factor CaCYP707A1 and the gibberellin(GA)synthesis related factor CaGA20ox1 in the germ roots of Capsicum annuum under salt pressure were also raised.Soaking seeds in SiNP250 could reduce the oxi-dative damage of Capsicum annuum seeds under salt stress,regulate the expression levels of ABA and GA-related genes,and promote the germination of seeds under salt stress.关键词
辣椒/盐胁迫/种子萌发Key words
Capsicum annuum/salt stress/seed germination分类
农业科技引用本文复制引用
刘小岑,胡海骏,田野,李慧玲,阳婷倩,赵志强,陈安军,朱永兴..外源纳米硅对盐胁迫下辣椒种子萌发及生理指标的影响[J].种子,2025,44(4):26-33,8.基金项目
湖北省重点研发计划项目(2022BBA0061) （2022BBA0061）
湖北省自然科学基金面上项目(2023AFB1001) （2023AFB1001）
