[1]蒋希瑶,黄俊杰,周英杰,等.不同浓度外源褪黑素对NaHCO3胁迫下番茄幼苗生长和生理指标的影响[J].北方园艺,2022,(09):1-9.[doi:10.11937/bfyy.20213909]
　JIANG Xiyao,HUANG Junjie,ZHOU Yingjie,et al.Effects of Exogenous Melatonin on Growth and Physiological Indexes of Tomato Seedlings Under NaHCO3 Stress[J].Northern Horticulture,2022,(09):1-9.[doi:10.11937/bfyy.20213909]

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不同浓度外源褪黑素对NaHCO3胁迫下番茄幼苗生长和生理指标的影响

《北方园艺》[ISSN:1001-0009/CN:23-1247/S] 卷: 期数: 2022年09 页码: 1-9 栏目: 出版日期: 2022-05-15

Title:: Effects of Exogenous Melatonin on Growth and Physiological Indexes of Tomato Seedlings Under NaHCO3 Stress

作者:: 蒋希瑶; 黄俊杰; 周英杰; 牛宁; 刘慧英; 刁明; （石河子大学农学院，特色果蔬栽培生理与种质资源利用兵团重点实验室，新疆石河子 832003）

Author(s):: JIANG Xiyao; HUANG Junjie; ZHOU Yingjie; NIU Ning; LIU Huiying; DIAO Ming; (School of Agriculture,Shihezi University/Key Laboratory of Physiology and Germplasm Resources Utilization Corps of Special Fruit and Vegetable Cultivation,Shihezi,Xinjiang 832003)

关键词:: 番茄幼苗; 碱胁迫; 褪黑素; 生长特性; 生理特性

Keywords:: tomato seedlings; alkali stress; melatonin; growth characteristics; physiological property

DOI:: 10.11937/bfyy.20213909

文献标志码:: A

摘要:: 以‘里格尔87-5’加工番茄幼苗为试材，采用水培番茄方式，模拟60 mmol?L-1 NaHCO3环境条件，研究喷施不同浓度褪黑素（MT）（50~500 μmol?L-1）对NaHCO3胁迫下番茄幼苗生长和生理指标的影响，以期为利用MT解决番茄生产中碱胁迫提供参考依据。结果表明：与CK相比，MT0显著降低了幼苗株高、地上部和地下部鲜干质量，MT200对植物生长发育形态指标缓解效果显著，提高了幼苗株高、地上部鲜质量和地下部鲜干质量的31.57 %、73.86 %、1.71倍、1.94倍。与CK相比，MT0处理下的净光合速率（Pn）、气孔导度（Gs）、胞间CO2浓度（Ci）、蒸腾速率（Tr）均显著下降，MT400处理下的光合特性缓解效果最为显著；在渗透胁迫方面,与CK相比，MT0导致幼苗叶片相对电导率(REC)、丙二醛（MDA）、过氧化氢(H2O2)、超氧阴离子（O?2）产生速率均显著升高且显著降低了番茄叶片中超氧化物歧化酶（SOD）、过氧化物酶（POD）活性，刺激了过氧化氢酶（CAT）、抗坏血酸过氧化物酶（APX）活性的增加。MT处理中，尤以MT400可显著增加SOD、POD活性，降低REC、MDA、H2O2、O?2。综上所述，一定浓度范围的MT可改善碱胁迫（60 mmol?L-1）下番茄幼苗的生长形态，增强光合作用、提高抗氧化酶活性，降低细胞膜脂过氧化，最终提高幼苗的耐碱力。

Abstract:: Taking tomato ‘Riegle 87-5’ as test materials,the effects of spraying different concentrations of melatonin (50-500 μmol?L-1) on the growth and physiological indexes of tomato seedlings under NaHCO3 stress,tomato seedlings were processed by hydroponic method and simulated 60 mmol?L-1 NaHCO3 environment,in order to provide reference for using MT to solve alkali stress in tomato production.The results showed that compared with CK,MT0 significantly reduced the plant height and fresh and dry weight of aboveground and underground parts of seedlings,MT200 significantly alleviated the morphological indexes of plant growth and development,and increased the plant height,fresh weight of aboveground and fresh dry weight of underground parts by 31.57%,73.86%,1.71 and 1.94 times.Compared with CK,Pn,Gs,Ci and Tr decreased significantly under MT0 treatment,and photosynthetic characteristics alleviated most significantly under MT400 treatment.In terms of osmotic stress,MT0 significantly increased the relative electrical conductivity (REC),malondialdehyde (MDA),hydrogen peroxide (H2O2) and superoxide anion (O?2) production rates,significantly reduced the activities of SOD and POD in tomato leaves,and stimulated the activities of CAT and APX enzymes compared with CK.MT treatment,especially MT400 could significantly increase the activities of SOD and POD,and decrease REC,MDA,H2O2,O?2.In conclusion,MT in a certain concentration range could improve the growth morphology of tomato seedlings under alkali stress (60 mmol?L-1),enhance photosynthesis,improve the activity of antioxidant enzymes,reduce cell membrane lipid peroxidation,and ultimately improve the alkali tolerance of seedlings.

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备注/Memo

第一作者简介：蒋希瑶（1996-），女,硕士研究生，研究方向为设施蔬菜抗逆生理。E-mail：jiangxiyaoshzu@163.com.责任作者：刁明（1968-）,男,博士，教授,现主要从事园艺作物生理生态与信息农业等研究工作。E-mail：diaoming@shzu.edu.cn.基金项目：国家自然科学基金资助项目（U19031）。收稿日期：2021-09-19

更新日期/Last Update: 2022-06-07