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中国农学通报

中国农学通报 ›› 2025, Vol. 41 ›› Issue (15): 65-70.doi: 10.11924/j.issn.1000-6850.casb2024-0571

• 林学·园艺·园林 • 上一篇    下一篇

海水胁迫对生菜种子发芽及幼苗生理特性的影响

郭巨先1(), 黄旺平1(), 刁金花2,3, 周永航2,3, 王廷芹2   

  1. 1 广东省蔬菜新技术重点实验室/广东省农业科学院蔬菜研究所，广州 510640
    2 广东海洋大学，广东湛江 524088
    3 仁化县董塘中学，广东韶关 512000
  • 收稿日期:2024-09-09 修回日期:2025-03-25 出版日期:2025-05-25 发布日期:2025-05-29
  • 通讯作者:
    黄旺平，男，1984年出生，广东兴宁人，助理研究员，硕士，主要从事蔬菜栽培生理与新品种新技术示范推广工作。通信地址：510640 广东省广州市天河区金颖路66号 广东省农业科学院蔬菜研究所，Tel：020-38468848，E-mail：。
  • 作者简介:

    郭巨先，女，1970年出生，湖南桃源人，研究员，硕士，研究方向：特色蔬菜资源利用研究。通信地址：510640 广州市天河区金颖路66号 广东省农业科学院蔬菜研究所，E-mail：。

  • 基金资助:
    广东省省级乡村振兴战略专项资金种业振兴项目“华南特色叶菜优质耐热抗病新品种选育及示范推广”(2024-NPY-00-005); 教育部卓越农林人才培养计划(GDOU2014041204); 国家级农科教合作人才培养基地(GDOU2013040301); 园艺和园林专业实践技能型农林人才培养模式改革试点(GDOU2014041208); 园艺专业综合改革试点(GDOU2013040402)

Effects of Seawater Stress on Germination of Lettuce Seeds and Seedling Growth

GUO Juxian1(), HUANG Wangping1(), DIAO Jinhua2,3, ZHOU Yonghang2,3, WANG Tingqin2   

  1. 1 Guangdong Key Laboratory of New Vegetable Technology/Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640
    2 Guangdong Ocean University, Zhanjiang, Guangdong 524088
    3 Renhua Middle School, Shaoguan, Guangdong 512000
  • Received:2024-09-09 Revised:2025-03-25 Published:2025-05-25 Online:2025-05-29

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摘要：

为探究生菜对海水胁迫的耐受性及适宜栽培浓度，指导海水生菜种植。本研究以耐抽薹生菜为试验材料，设置5个不同海水浓度0%(CK)、5%、10%、15%、20%处理组，对其种子萌发和幼苗生长进行胁迫处理，并测定生菜种子的发芽指标以及幼苗的生长指标、细胞膜通透性指标及抗氧化酶活性。结果显示，随着海水浓度的不断提高，生菜的发芽和生长指标呈下降趋势，生长过程中，生菜的相对盐害率、电导率、可溶性蛋白含量、MDA含量和SOD、CAT、POD活性等生理指标呈上升趋势。海水浓度<5%时，生菜的发芽和生长发育基本不受影响；海水浓度>10%时，生菜的发芽和生长受抑制；当海水浓度达到15%时，相对盐害率达到34.12%，显著高于空白对照。表明海水处理抑制了生菜种子萌发和幼苗发育，生菜能忍受较低浓度(<5%)的海水胁迫，其耐盐性与抗氧化系统调节及膜稳定性维持相关，该浓度范围可为海水农业利用提供理论依据。

关键词: 海水胁迫, 生菜, 种子萌发, 发芽率, 生长, 酶活, 抗逆性

Abstract:

The paper aims to study the response of lettuce to seawater stress, explore the suitable seawater concentration for lettuce growth, providing guidance for the cultivation of seawater lettuce. This experiment used bolting resistant lettuce as the experimental material, five treatment groups with different seawater concentrations of 0% (CK), 5%, 10%, 15%, and 20% were set up to impose stress on lettuce seeds and seedlings. The germination index of lettuce seeds, as well as the growth index, cell membrane permeability index, and antioxidant enzyme activity of lettuce seedlings were measured. The experimental results showed that with the continuous increase of seawater concentration, the germination and growth indicators of lettuce showed a downward trend. During the growth process, the relative salt damage rate, electrical conductivity, soluble protein content, MDA content, and physiological indicators such as SOD, CAT, POD, activity of lettuce showed an upward trend. When the seawater concentration was less than 5%, the germination and growth development of lettuce were basically not affected. When the seawater concentration was greater than 10%, the germination and growth of lettuce were inhibited, and the development of roots and stems was significantly less vigorous than that of the control. When the seawater concentration reached 15%, the relative salt damage rate reached 34.12%, which was significantly higher than the control. Seawater treatment inhibited lettuce seed germination and seedling development, and lettuce could tolerate seawater stress at lower concentrations (<5%), and its salt tolerance was related to the regulation of antioxidant system and the maintenance of membrane stability. This concentration range could provide a theoretical basis for the utilization of seawater in agriculture.

Key words: seawater stress, lettuce, seed germination, germination rate, growth, enzyme activity, resistance