外源虾青素对盐胁迫下萝卜种子萌发和芽苗生长的影响

打开文本图片集

中图分类号：S631.1 文献标识号：A 文章编号：1001-4942（2026）01-0054-07

AbstractIn order to explore the effect of exogenous astaxanthin （As）on radish seed germination and seedling growth under salt stress，this experimentused Jinluobo 3 as experimental material to study the effects of soaking seed with different concentrations （O.O5，O.1，0.3， 0.5g/L and 1.0g/L ）of As on radish seed germination and seedling growth under 15O mmol/L NaCl stress，using treatment with distilled water as control （CK）.The results showed that with the increase of As concentration，the germination rate，germination potential，germination index and vigor index of radish seeds undersalt stress showed a trend offirst increasing and then decreasing. Among them，soaking seed with 0.1g/L As （ NaCl+0.1A s），the seed germination rate，germination potential，germination index and vigor index were increased by 9.4% ， 29.3% ， 20.5% and 78.4% ， respectively，compared with the NaCl treatment，and the relative salt injury rate was significantly reduced by （204号 71.5% . The NaCl+0.1i As treatment also significantly promoted seedling growth，and the single plant fresh weight，shoot height and root length increased by 33.8% ， 65.2% and 86.9% ，respectively，compared with NaCl treatment. Compared with CK，NaCl treatment significantly promoted the accumulation of hydrogen peroxide ） and malondialdehyde （MDA） in seedling leaves and reduced cell activity of root tips，resulting in aggravated oxidative damage.The treatment with appropriate concentration of astaxanthin significantly increased the contents of soluble protein，phenolic compounds，ascorbic acid and glutathione in seedlings，enhanced antioxidant activity and reduced oxidative damage caused by salt stress，among which， NaCl+0.1 As treatment showed the best alleviating efect.In conclusion，exogenous As could effectively alleviate the oxidative damage of salt stress to radish germination and seedling growth，promote seed germination and seedling growth，and improve salt tolerance of radish seedlings.The results of this study could provide a certain theoretical and technical support for the application of As to improve radish resistance to salt stress.

KeywordsAstaxanthin; Radish； Salt stress； Seed Germination; Seedling growth； Antioxidant system

土壤盐渍化是全球农业生产面临的主要问题之一。（剩余10623字）