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当前位置: 首页 > 文章 > 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 山西农业科学 2025,53 (1) 64-72
Position: Home > Articles > Effects of Exogenous Spraying Brassinolide on Waterlogging Tolerance of Sesame under Waterlogging Stress at Flowering Stage Journal of Shanxi Agricultural Sciences 2025,53 (1) 64-72

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

作  者：
丁芳;吕树立;田壮博
单  位：
商丘市农林科学院
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
摘  要：
为探究盛花期渍害胁迫对芝麻生长、生理特性的影响及2,4-表芸苔素内酯对芝麻渍害胁迫的调控效应,以耐渍芝麻品种商芝189和渍害敏感郑芝13为试验材料,采用盆栽法,于芝麻盛花期(出苗后50 d)进行叶面喷施2,4-表芸苔素内酯(0.01、0.03、0.05 mg/kg),喷药后淹水处理36 h,渍害胁迫结束后常温恢复5 d,对芝麻植株根系生长情况、抗氧化体系及渗透调节物质等指标进行测定.结果表明,渍害胁迫下,2个芝麻品种的光合效率、抗氧化酶活性及渗透调节物质含量均显著下降,渍害敏感品种郑芝13表现尤为明显.与不喷施(CK2)相比,2,4-表芸苔素内酯质量分数为 0.03 mg/kg时,耐渍品种商芝 189株高、茎粗、侧根数分别增加 9.36%、8.66%、12.82%,可溶性蛋白含量显著提高31.01%;2,4-表芸苔素内酯质量分数为0.05 mg/kg时,渍害敏感品种郑芝13株高增加9.96%,侧根数、侧根干质量分别增加14.92%、14.28%,SOD、POD活性分别增加13.01%、13.88%.综上所述,喷施2,4-表芸苔素内酯能显著提高盛花期渍害胁迫下芝麻的耐涝性,促进芝麻侧根生长,提高叶片保护酶活性和光合能力等多项指标,有利于渍害胁迫后芝麻植株的生长恢复;其中,0.03 mg/kg 2,4-表芸苔素内酯喷施对促进耐渍品种商芝 189恢复生长的效果最好,渍害敏感品种郑芝 13以 0.05 mg/kg 2,4-表芸苔素内酯喷施效果最佳.
译  名：
Effects of Exogenous Spraying Brassinolide on Waterlogging Tolerance of Sesame under Waterlogging Stress at Flowering Stage
关键词：
sesame%waterlogging stress%24-epibrassinosteroid%photosynthetic capacity%enzyme activity%osmotic regulator
摘  要：
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.

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