外源褪黑素和硅对盐胁迫下芹菜幼苗生长及生理特性的影响

doi:10.15933/j.cnki.1004-3268.2020.01.013

河南农业科学 ›› 2020, Vol. 49 ›› Issue (1): 96-102.DOI: 10.15933/j.cnki.1004-3268.2020.01.013

外源褪黑素和硅对盐胁迫下芹菜幼苗生长及生理特性的影响

李红杰

（内蒙古农业大学职业技术学院，内蒙古包头 014109）

收稿日期:2019-08-25 出版日期:2020-01-15 发布日期:2020-01-15
作者简介:李红杰（1971-），男，内蒙古赤峰人，实验师，主要从事植物病虫害防治及抗性生理研究。E-mail：927182669@qq.com
基金资助:
内蒙古自治区科技计划项目（20130209）

Effects of Exogenous Melatonin and Silicon on the Growth and Physiological Characteristics of Celery(Apium graveolens) Seedlings under Salt Stress

LI Hongjie

(Vocational and Technical College of Inner Mongolia Agricultural University,Baotou 014109,China)

Received:2019-08-25 Published:2020-01-15 Online:2020-01-15

摘要/Abstract

摘要： 为了探究外源褪黑素和硅对芹菜幼苗耐盐性的调节作用并明确其作用途径，以西芹皇后为试验材料，研究盐胁迫条件下单独和复配喷施外源褪黑素和硅对芹菜幼苗生长、光合作用、抗氧化系统及渗透调节系统的影响。结果表明，盐胁迫会显著抑制芹菜幼苗生长和光合作用，显著提升超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶（CAT）,抗坏血酸过氧化物酶（APX）活性，过氧化氢（H₂O₂）、丙二醛（MDA）、可溶性糖、可溶性蛋白、脯氨酸含量均显著增加；单独或复配施用外源褪黑素和硅均可显著促进盐胁迫下芹菜幼苗生长，显著提高叶片净光合速率（Pn）、气孔导度（Gs）和蒸腾速率（Tr），抗氧化酶（SOD、POD、CAT及APX）活性得到进一步增强，显著抑制了MDA及H₂O₂在叶片中的积累，以二者配施效果最佳。盐胁迫处理条件下，二者配施处理的芹菜幼苗株高、茎粗、叶面积、干质量、Pn、Gs、Tr、SOD、POD、CAT、APX活性、可溶性糖、可溶性蛋白、脯氨酸含量分别增加22.24%、24.33%、46.74%、14.89%、59.30%、82.40%、54.11%、33.18%、40.35%、30.95%、66.43%、48.64%、58.94%、44.09%；MDA和H₂O₂含量分别降低42.94%和29.93%。表明外源褪黑素和硅可通过提高盐胁迫下芹菜幼苗的光合作用、活性氧清除能力和渗透平衡调节能力来缓解盐害并提高耐盐性，且二者具有一定的协同增效作用。

关键词: 芹菜, 盐胁迫, 褪黑素, 硅, 生理特性

Abstract: In order to study the effects of exogenous melatonin and silicon on salt tolerance of celery seedling and clarify the mechanism,a celery cultivar—Huanghou was selected as experimental material,the effects of single and compound exogenous melatonin and silicon on the plant growth,photosynthesis,antioxidant system and osmotic regulation system of celery seedling under salt stress were investigated.The results showed that under salt stress condition,the growth and photosynthesis of celery seedling were significantly inhibited,the activities of SOD,POD,CAT and APX were significantly enhanced,and the contents of H₂O₂,MDA,soluble sugar,soluble protein and proline were significantly increased.Single or combined application of exogenous melatonin and silicon significantly improved the growth of celery seedling,significantly reduced MDA content and H₂O₂ content,significantly raised Pn,Gs and Tr values,significantly enhanced the activities of antioxidant enzymes(POD,SOD,CAT and APX) of celery seedling leaves under salt stress and the best effect was from the combination of exogenous melatonin and silicon.Under the salt stress,compared with salt stress,the plant height,stem diameter,leaf area,dry weight,Pn,Gs,Tr,SOD,POD,CAT and APX activities,soluble sugar,soluble protein and proline contents of celery seedlings treated with the combination of exogenous melatonin and silicon increased by 22.24%,24.33%,46.74%,14.89%,59.30%,82.40%,54.11%,33.18%,40.35%,30.95%,66.43%,48.64%,58.94%and 44.09% respectively,and the MDA content and H₂O₂content were decreased by 42.94% and29.93% respectively.These results suggest that single or combined application of exogenous melatonin and silicon effectively alleviate the salinity damage and improve the resistance of celery seedlings under salt stress by improving photosynthesis,active oxygen scavenging capacity and osmotic balance regulation capacity of celery seedling,and a synergistic effect is observed after applying both exogenous melatonin and silicon.

Key words: Celery, Salt stress, Melatonin, Silicon, Physiological characteristic

中图分类号:

S636.3

李红杰. 外源褪黑素和硅对盐胁迫下芹菜幼苗生长及生理特性的影响[J]. 河南农业科学, 2020, 49(1): 96-102.

LI Hongjie. Effects of Exogenous Melatonin and Silicon on the Growth and Physiological Characteristics of Celery(Apium graveolens) Seedlings under Salt Stress[J]. Journal of Henan Agricultural Sciences, 2020, 49(1): 96-102.

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外源褪黑素和硅对盐胁迫下芹菜幼苗生长及生理特性的影响

Effects of Exogenous Melatonin and Silicon on the Growth and Physiological Characteristics of Celery(Apium graveolens) Seedlings under Salt Stress

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