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中国农学通报 ›› 2026, Vol. 42 ›› Issue (19): 172-178.doi: 10.11924/j.issn.1000-6850.casb2025-0930

• 畜牧·动物医学·蚕·蜂 • 上一篇    下一篇

外源柠檬酸对紫花苜蓿种子萌发及其幼苗生长的影响

韩月1,2(), 徐冬3, 陈程1, 樊玉超1, 赵瑞1, 于鹏3, 辛治坤3, 刘光辉1()   

  1. 1 国能新疆托克逊能源有限责任公司, 乌鲁木齐 830000
    2 国家能源集团新疆能源化工有限责任公司, 乌鲁木齐 830000
    3 国家能源集团新能源技术研究院, 北京 102209
  • 收稿日期:2025-11-16 修回日期:2026-08-16 出版日期:2026-10-15 发布日期:2026-10-15
  • 通讯作者:
    刘光辉,男,1989年出生,河南驻马店人,工程师,本科,主要从事矿山开采与安全、矿山生态与修复相关研究。E-mail:。
  • 作者简介:

    韩月,男,1992年出生,辽宁沈阳人,助理工程师,本科,主要从事矿山开采与安全、矿山生态与修复相关研究。E-mail:。

  • 基金资助:
    新疆公司黑山矿区微藻固碳适用性及其生态应用潜力实验研究项目(2023F2PU00400)

Influences of Exogenous Citric Acid on Seed Germination and Seedling Growth of Alfalfa

HAN Yue1,2(), XU Dong3, CHEN Cheng1, FAN Yuchao1, ZHAO Rui1, YU Peng3, XIN Zhikun3, LIU Guanghui1()   

  1. 1 Xinjiang Tuokexun Energy Co., Ltd., China Energy, Urumqi 830000
    2 Xinjiang Energy Chemical Co., Ltd., China Energy, Urumqi 830000
    3 New Energy Technology Research Institute, China Energy, Beijing 102209
  • Received:2025-11-16 Revised:2026-08-16 Published:2026-10-15 Online:2026-10-15

摘要: 为明确外源柠檬酸对紫花苜蓿种子萌发及幼苗生长的调控效应,并探究其对幼苗抗氧化生理特性的影响,以紫花苜蓿为研究对象,通过水培试验,分析不同浓度外源柠檬酸对紫花苜蓿发芽率、发芽势、发芽指数、根长、株高、生物量、叶绿素含量、可溶性蛋白、超氧化物歧化酶和过氧化物酶活性等指标的影响。结果表明,外源柠檬酸对紫花苜蓿种子的萌发与幼苗的生长均有负面影响,但对紫花苜蓿幼苗光合作用的影响不显著。外源柠檬酸可以通过调节紫花苜蓿幼苗的可溶性蛋白含量、SOD、POD活性,增强幼苗抗氧化能力与逆境适应能力。研究发现,当外源柠檬酸浓度小于6 mmol/L时,紫花苜蓿幼苗可以通过氧化应激响应维持正常的生长发育;当外源柠檬酸浓度≥8 mmol/L时,紫花苜蓿种子萌发及幼苗生长会受到明显抑制。

关键词: 柠檬酸, 紫花苜蓿, 种子萌发, 氧化应激, 生理生化

Abstract:

To clarify the regulatory effects of exogenous citric acid on the germination of alfalfa seeds and seedling growth, and to investigate its impact on the antioxidant physiological characteristics of the seedlings, the effects of exogenous citric acid at different concentrations on the germination rate, germination potential, germination index, root length, plant height, biomass, chlorophyll content, soluble protein, superoxide dismutase and peroxidase activities of alfalfa were analyzed through the hydroponic experiments using alfalfa as the research object. The results showed that exogenous citric acid negatively affected both seed germination and seedling growth of alfalfa. However, the impact on photosynthesis was not significant. Exogenous citric acid could enhance the antioxidant capacity and stress adaptability of alfalfa seedlings by affecting the soluble protein content, SOD, and POD activity of the seedlings. It was found that alfalfa seedlings could maintain normal growth and development through oxidative stress response when the concentration of exogenous citric acid was <6 mmol/L. When the concentration of exogenous citric acid was ≥8 mmol/L, the germination of alfalfa seeds and growth of alfalfa seedlings were significantly inhibited.

Key words: citrate acid, alfalfa, seed germination, oxidative stress, physiology and biochemistry

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