山西农业科学2025，Vol.53Issue(1)：64-72,9.DOI:10.3969/j.issn.1002-2481.2025.01.07
外源喷施2,4-表芸苔素内酯对盛花期渍害胁迫下芝麻耐渍性的影响
Effects of Exogenous Spraying Brassinolide on Waterlogging Tolerance of Sesame under Waterlogging Stress at Flowering Stage
摘要
Abstract
In order to study the effects of waterlogging stress on growth and physiological characteristics of sesame at flowering stage and the regulation effect of 24-epibrassinolide on waterlogging stress of sesame,in this study,using a waterlogging tolerant sesame variety Shangzhi 189 and a waterlogging sensitive sesame variety Zhengzhi 13 as experimental materials,taking the potted plant method,the treatment of foliar spraying of 24-epibrassinolide(0.01,0.03,and 0.05 mg/kg),followed by continuous flooding treatment for 36 hours,and 5 days of normal temperature recovery after waterlogging stress was conducted.The indicators including root growth,antioxidant system,and osmotic regulators of sesame plants were measured.The results showed that under waterlogging stress,the photosynthetic efficiency,antioxidant enzyme activity,and osmotic regulator content of the two sesame varieties significantly decreased,especially the waterlogging sensitive variety Zhengzhi 13.Compared with the treatment without spraying(CK2),when the mass concentration of brassinolide was 0.03 mg/kg,the plant height,stem diameter,and lateral root number of the waterlogging tolerant variety Shangzhi 189 increased by 9.36%,8.66%,12.82%,the soluble protein content significantly increased by 31.01%.When the massconcentration of brassinolide was 0.05mg/kg,the plant height of waterlogging sensitive sesame variety Zhengzhi 13 increased by 9.96%,the lateral root number and dry weight increased by 14.92%and 14.28%,respectively,and the activities of SOD and POD increased by 13.01%,13.88%.In conclusion,spraying brassinolide could significantly improve the waterlogging tolerance of sesame under waterlogging stress at the flowering stage,promote lateral root growth of sesame,increase protective enzyme activity and photosynthetic capacity,and other indicators,which was beneficial for the growth recovery of sesame plants after waterlogging stress.Among them,the best effect of recovery growth of waterlogging tolerant variety Shangzhi 189 was induced by spraying 0.03 mg/kg,and the best effect of recovery growth of waterlogging sensitive variety Zhengzhi 13 was induced by spraying 0.05 mg/kg.关键词
芝麻/渍害胁迫/2,4-表芸苔素内酯/光合能力/酶活性/渗透调节物质Key words
sesame/waterlogging stress/24-epibrassinosteroid/photosynthetic capacity/enzyme activity/osmotic regulator分类
农业科技引用本文复制引用
丁芳,吕树立,田壮博..外源喷施2,4-表芸苔素内酯对盛花期渍害胁迫下芝麻耐渍性的影响[J].山西农业科学,2025,53(1):64-72,9.基金项目
河南省科技攻关项目(212102110371) （212102110371）
河南省农科系统协同创新合力发展工程项目(2020CX02) （2020CX02）
商丘市农林科学院科技攻关项目(2021006.2) （2021006.2）
