安徽农业大学学报2025，Vol.52Issue(1)：16-23,8.DOI:10.13610/j.cnki.1672-352x.20250320.009
不同浓度亚硒酸钠对燕麦幼苗生长及生理特性的影响
Effects of different concentrations of sodium selenite on the growth and physiological characteristics of oat seedlings
摘要
Abstract
[Objective]This study aimed to analyze the changes in physiological indicators related to oat(Avena sativa L.)seedlings under different concentrations of sodium selenite Na2SeO3 treatments.[Method]Oat seedlings were cultivated by a potted plant method for one week,and then treated with different concentrations of Na2SeO3(0,0.01,0.02,0.05,0.075 and 0.1 g·kg-1)for two weeks,and the changes of relevant physiological response of oat seed-lings under selenium treatments were analyzed.[Result]Compared with the control,with the increase of Na2SeO3 concentration,the relevant physiological indicators of oat seedlings changed:(1)Appropriate Na2SeO3 concentration(0.02 g·kg-1)promoted the plant height,leaf length,and dry weight of oat seedlings,while the treatment with high(0.1 g·kg-1)Na2SeO3 concentration inhibited the growth of oat seedlings.(2)Under the treatment of 0.1 g·kg-1 Na2SeO3,the content of chlorophyll a+b and the rate of O2·-production were significantly decreased by 22.15%and 64.50%,respectively(P<0.05).(3)Under the treatment of 0.1 g·kg-1 Na2SeO3,the contents of soluble sugars,MDA and proline were significantly increased by 121.73%,107.09%and 362.82%,respectively(P<0.05).(4)The activity of APX showed a decreasing trend by 50.47%-99.71%(P<0.05);the SOD activity of oat seedlings was significantly increased by 167.41%-200.87%(P<0.05)under the treatment of 0.01-0.05 g·kg-1 Na2SeO3;the POD activity was significantly increased by 90.83%-139.40%(P<0.05)under the treatment of 0.05-0.1 g·kg-1 Na2SeO3.(5)The treatment concentration of Na2SeO3 showed highly significant positive correlations(P<0.01)with soluble sugars,MDA,proline content,and POD activity in the seedlings,and highly significant negative correlations(P<0.01)be-tween the treatment concentration of Na2SeO3 and the plant height,leaf length,chlorophyll a content,chlorophyll b content,chlorophyll a+b content,carotenoid content,and APX activity of the seedlings.[Conclusion]Na2SeO3 has a dual effect on the oat seedlings,and applying the right concentration is beneficial to the growth and physiology of oat seedlings,and the best results were obtained with 0.02 g·kg-1 Na2SeO3 treatment,which provide clues for basic re-search and cultivation of selenium-enriched oats.关键词
Na2SeO3/燕麦/幼苗/生长/生理指标Key words
Na2SeO3/oats/seedlings/growth/physiological index分类
农业科技引用本文复制引用
马建霞,刘念,吴晓卓,李祖夏,吴彤,马晓忠,乔枫..不同浓度亚硒酸钠对燕麦幼苗生长及生理特性的影响[J].安徽农业大学学报,2025,52(1):16-23,8.基金项目
青海"昆仑英才·高端创新创业人才"计划特色人才之人才引领平安富硒特色产业集群发展项目(2022-027)和青海师范大学大学生创新训练项目(qhnucxcy2024063)共同资助. （2022-027）
