外源水杨酸、褪黑素对盐胁迫下大豆种子萌发和幼苗生长的影响  

Effects of exogenous salicylic acid or melatonin on seed germination and seedling growth of soybean under salt stress

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作  者:李傲宇 李瑞敏 陈翼芝 于爽[1] LI Aoyu;LI Ruimin;CHEN Yizhi;YU Shuang(College of Life Science and Technology,Mudanjiang Normal University,Mudanjiang 157011,China)

机构地区:[1]牡丹江师范学院生命科学与技术学院,黑龙江牡丹江157011

出  处:《安徽农学通报》2024年第19期31-36,共6页Anhui Agricultural Science Bulletin

基  金:牡丹江师范学院研究生科技创新项目(kjcx2023-106mdjnu);牡丹江师范学院“十四五”双一流学科建设揭榜挂帅项目(MSYSYL2022018);黑龙江省教育厅教学改革工程项目(SJGY20220619)。

摘  要:为研究外源水杨酸、褪黑素对盐胁迫下大豆种子萌发和幼苗生长的影响,筛选出效果较为明显的缓解剂。本试验以大豆吉育204为材料,对100 mmol/L NaCl胁迫下的大豆种子分别外源施加浓度为0.1、0.2和0.5 mmol/L的水杨酸或褪黑素,进行培养皿纸上发芽试验,对其发芽率、发芽势、发芽指数、活力指数、相对盐害率以及幼苗鲜重和苗长进行测定。结果表明,与CK0(空白对照、未经NaCl胁迫)相比,100 mmol/L NaCl胁迫下的大豆种子发芽率、发芽势、发芽指数、活力指数和幼苗鲜重、苗长分别下降了28.34%、21.67%、35.89%、47.79%、21.16%和47.82%,相对盐害率30.91%。0.1、0.2和0.5 mmol/L的水杨酸或褪黑素对盐胁迫下大豆种子发芽率、发芽势、发芽指数、活力指数和幼苗鲜重、苗长均有促进作用,并降低了相对盐害率。其中,与CK1(NaCl胁迫)相比较,0.2 mmol/L褪黑素处理的盐胁迫大豆种子的发芽率、发芽势、发芽指数、活力指数、幼苗鲜重和苗长分别提高23.00%、25.00%、43.43%、66.84%、20.19%和19.12%,并使相对盐害率降至23.48%。褪黑素对大豆盐胁迫的缓解效应整体上优于水杨酸,可作为大豆抵御盐胁迫的较优缓解剂。In order to explore the effects of exogenous salicylic acid and melatonin on seed germination and seedling growth of soybean under salt stress,a more effective alleviator was selected.In this experiment,soybean Jiyu 204 was used as the material.Salicylic acid or melatonin with concentrations of 0.1,0.2 and 0.5 mmol/L were exogenous applied to soybean seeds under 100 mmol/L NaCl stress,respectively,and germination experiments were carried out on petri dish paper.Germination rate,germination potential,germination index,vitality index,relative salt damage rate,fresh weight and seedling length were measured.The results showed that compared with Ck0(blank control,without NaCl force),the germination rate,germination potential,germination index,vitality index,fresh weight and seedling length of soybean seedlings under 100 mmol/L NaCl stress decreased by 28.34%,21.67%,35.89%,47.79%,21.16%and 47.82%,respectively,and the relative salt damage rate was 30.91%.Salicylic acid or melatonin at concentrations of 0.1、0.2、0.5 mmol/L promoted the germination rate,germination potential,germination index,vigor index,fresh weight and seedling growth of soybean seeds under salt stress,and decreased the relative salt damage rate.Among them,compared with CK1(NaCl force),the germination rate,germination potential,germination index,vitality index,seedling fresh weight and seedling length of salt-stressed soybean seeds treated with 0.2 mmol/L melatonin increased by 23.00%,25.00%,43.43%,66.84%,20.19%and 19.12%,respectively,and the relative salt damage rate decreased to 23.48%.The alleviating effect of melatonin on soybean salt stress is better than that of salicylic acid on the whole,and it can be used as a better alleviating agent for soybean to resist salt stress.

关 键 词:盐胁迫 水杨酸 褪黑素 大豆种子萌发 幼苗生长 

分 类 号:S565.1[农业科学—作物学]

 

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