|Table of Contents|

Effects of Melatonin on Seedlings Morphology and Physiological Characteristics of Lettuce Under PEG Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2022年10
Page:
1-8
Research Field:
Publishing date:

Info

Title:
Effects of Melatonin on Seedlings Morphology and Physiological Characteristics of Lettuce Under PEG Stress
Author(s):
ZHANG Panpan1; 2; GAO Yan1; WANG Xiaolin1; LIU Yuren1; LIANG Xilong2; ZHANG Xiong1
(1.College of Life Science,Yulin University,Yulin,Shanxi 719000；2.Heilongjiang Province Engineering & Technology Research Center of Plant Growth Regulation,Daqing,Heilongjiang 163316)
Keywords:
lettuce; melatonin; drought stress; morphology; physiological characteristics
PACS:
-
DOI:
10.11937/bfyy.20214324
Abstract:
‘Aoyue lettuce’ was used as the experimental material.The potted method was adopted,four treatments were set up including the nutrient solution (CK),the nutrient solution containing 100 μmol?L-1 melatonin (MT),the nutrient solution containing 25% PEG (D) and 25%PEG nutrient solution + root irrigation nutrient solution contained 100 μmol?L-1 melatonin (D+MT), and the effects of melatonin on the growth and physiological characteristics of lettuce seedlings under PEG stress were studied,in order to provide reference for drought-resistant cultivation of melatonin in lettuce.The results showed that root length,root volume,root area,average root diameter,aboveground and underground dry weight and root-shoot ratio of melatonin applied lettuce seedlings were significantly increased in melatonin applied to roots under drought stress (P<0.05),leaf relative water content also increased,but the difference was not significant.Melatonin increased the actual photochemical efficiency and photochemical quenching coefficient of the photosystem Ⅱ of lettuce leaves,and decreased the non-photochemical quenching coefficient of PS components in leavesunder drought stress.In addition to root peroxidase (POD) activity,superoxide dismutase (SOD) activity,peroxidase (POD) activity and soluble protein content in leaves and roots were increased by melatonin under drought stress,but malondialdehyde (MDA) contentin leaves and roots decreased.SOD activity in roots and leaves was significantly different between D and D+MT (P<0.05).Therefore,root application of 100 μmol?L-1 melatonin can regulate the morphological characteristics of lettuce seedlings,enhance the activities of protective enzymes and soluble protein content in roots and leaves,and improve photosynthetic index of lettuce leaves,alleviating the stress of lettuce under drought conditions,thus providing theoretical basis for high yield cultivation of lettuce.

References:

[1]LEE D Y,CHOI G H,MEGSON D,et al.Effect of soil organic matter on the plant uptake of perfluorooctanoic acid (PFOA) and perfluorooctanesulphonic acid (PFOS) in lettuce on granular activated carbon-applied soil[J].Environmental Geochemistry and Health,2021，43:2193-2202.[2]罗康胜,张米欢,翟兆东,等.生菜WOX 基因家族的鉴定与分析[J/OL].分子植物育种.(2021-07-21)[2021-06-22].https://kns.cnki.net/kcms/detail/46.1068.S.20210622.1012.002.html.[3]WU L M,ZHANG X C,XIAO G H.Effects of environmental factors on tomato growth and development[J].Agricultural Science & Technology,2015,30(2):214-219.[4]罗漫雅,耿广坡,周洪奎,等.常用气象干旱指数SPEI和SPI在陕北地区的适用性研究[J].湖北农业科学,2020,59(21):42-50.[5]SORRENTINO M,COLLA G,ROUPHAEL Y,et al.Lettuce reaction to drought stress：Automated high-throughput phenotyping of plant growth and photosynthetic performance[J].Acta Horticulturae,2020,1268:133-142.[6]杨新元.外源褪黑素对干旱胁迫下向日葵幼苗生长、光合及抗氧化系统的影响[J].华北农学报,2019,34(4):113-121.[7]李鹏辉,向金友,王林,等.干旱胁迫下外源褪黑素对烟草幼苗生理特性的影响[J].中国农业科技导报,2019,21(5):41-48.[8]李琳琳,宋彦涛,金华,等.外源褪黑素对干旱胁迫下番茄叶片光合特性和抗氧化酶系统的影响[J].大连民族大学学报,2019,21(1):33-38.[9]张明聪,何松榆,秦彬,等.外源褪黑素对干旱胁迫下春大豆品种绥农 26 形态、光合生理及产量的影响[J].作物学报,2021,47(9):1791-1805.[10]邹京南,于奇,金喜军,等.外源褪黑素对干旱胁迫下大豆鼓粒期生理和产量的影响[J].作物学报,2020,46(5):745-758.[11]赵成凤,李红杰,郑学慧,等.干旱及复水条件下外源褪黑素对玉米叶片光合作用的影响[J].生态学报,2021,41(4):1431-1439.[12]李红叶,翟秀珍,张少聪,等.外源褪黑素对干旱胁迫下小麦发芽及幼苗生理特性的影响[J].西北农林科技大学学报(自然科学版),2021(6):2-11.[13]高俊凤.植物生理学实验指导[M].北京:高等教育出版社,2006.[14]王学奎,黄见良,李合生.中国植物生理学教材建设的回顾、探索与展望[J].植物生理学报,2013,49(6):510-514.[15]赵海泉.基础生物学实验指导植物生理学分册[M].北京:中国农业大学出版社,2009.[16]张志良,瞿伟菁,李小方.植物生理学实验指导[M].北京:高等教育出版社,2009.[17]LI L J,GU W R,LI J,et al.Exogenously applied spermidine alleviates photosynthetic inhibition under drought stress in maize (Zea mays L.) seedlings associated with changes in endogenous polyamines and phytohormones[J].Plant Physiology and Biochemistry,2018,129：35-55.[18]张盼盼,杨裕然,薛佳欣,等.烯效唑对盐胁迫下糜子幼苗形态和生理特性的调控效应[J].草业学报,2020,29(10):81-90.[19]马旭辉,陈茹梅,柳小庆,等.褪黑素对玉米幼苗根系发育和抗旱性的影响[J].生物技术通报,2021,37(2):1-14.[20]MUHAMMAD A S R,MUHAMMAD F S,MUHAMMAD Y A,et al.Glycinebetaine applied under drought improved the physiological efficiency of wheat (Triticum aestivum L.)plant[J].Soil & Environment,2012,31(1):67-71.[21]李冬,申洪涛,王艳芳,等.外源褪黑素对干旱胁迫下烟草幼苗光合碳同化和内源激素的影响[J].草业学报,2021,30(1):130-139.[22]郄亚微.硅对干旱胁迫下生菜幼苗生长及光合特性的影响[J].北方园艺,2021(6):8-14.[23]方怡然,薛立.盐胁迫对植物叶绿素荧光影响的研究进展[J].生态科学,2019,38(3):225-234.[24]邵瑞鑫,李蕾蕾,郑会芳,等.外源一氧化氮对干旱胁迫下玉米幼苗光合作用的影响[J].中国农业科学,2016,49(2):251-259.[24]张环纬,陈彪,温心怡,等.外源硅对干旱胁迫下烟草幼苗生长、叶片光合及生理指标的影响[J].生物技术通报,2019,35(1):23-32.[25]吴燕,连洪燕,牟雪姣,等.干旱胁迫下叶面喷施褪黑素对滁菊幼苗生理生化特性的影响[J].西北植物学报,2016,36(11):2241-2246.[26]张俊康,马丽,吴姝青,等.外源褪黑素对软枣猕猴桃低温伤害的缓解效应[J].植物生理学报,2020,56(5)：1081-1087.

Memo

Memo:
-
Last Update: 2022-07-01