Journal of Tropical Oceanography ›› 2026, Vol. 45 ›› Issue (4): 217-229.doi: 10.11978/2025067CSTR: 32234.14.2025067

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The role of multi-hormone synergistic regulation in the resistance of Kandelia obovata to transplant stress

GONG Shouji1(), XIE Xiaokui2,3, WANG Riming2,3(), LI Xiujian3, LING Longyan1, ZHENG Jian1   

  1. 1 College of Food Engineering, Beibu Gulf University, Qinzhou 535011, China
    2 Guangxi Key Laboratory of Marine Environmental Disaster Processes and Ecological Protection Technology, Beibu Gulf University, Qinzhou 535011, China
    3 College of Resources and Environment, Beibu Gulf University, Qinzhou 535011, China
  • Received:2025-05-20 Revised:2025-06-24 Online:2026-07-10 Published:2026-07-31
  • Contact: WANG Riming. email:
  • Supported by:
    National Natural Science Foundation of China(42366009); Municipal-level Financial Science and Technology Development Projects of Qinzhou City(20223623); Municipal-level Financial Science and Technology Development Projects of Qinzhou City(20233204)

Abstract:

During growth and development, plants are frequently exposed to various stress factors and respond through dynamic regulatory mechanisms involving endogenous hormones. This study employed the technology of liquid chromatography-tandem mass spectrometry (LC-MS/MS) metabolomics to detect hormone content levels in the roots of Kandelia obovata from the artificial transplantation mangrove at Kongque Bay (KQW-E) in Qinzhou Port and from the natural mangrove habitat (JGJ-C). Furthermore, the study analyzed the metabolic characteristics of these hormones and their interactions, providing insights into plant responses to environmental stresses. Primary metabolic pathways were determined through Kyoto Encyclopedia of Genes and Genomes (KEGG) annotation. The results showed that: (1) a total of 62 phytohormones were detected in the roots of Kandelia obovata from both sites, with 28 of them exhibiting significant differences (16 up-regulated and 12 down-regulated); (2) in the KQW-E group, stress-related hormones such as abscisic acid (ABA) and abscisic acid-glucose ester (ABA-GE), as well as conjugated auxin (1-O-indol-3-ylacetylglucose, IAA-Glc), were significantly down-regulated, while growth-promoting hormones like zeatin (cis-zeatin riboside, cZR) and jasmonic acid precursor (dihydrojasmonic acid, H2JA) were significantly up-regulated; (3) KEGG data analysis further revealed that the differential hormones were primarily enriched in pathways such as terpenoid metabolism, plant hormone signal transduction, and secondary metabolism. Based on these findings, it can be inferred that K. obovata may coordinately regulate multiple hormones, including abscisic acid, auxin, jasmonic acid, and cytokinin, to dynamically balance active hormone levels, down-regulate stress responses, and up-regulate growth-related metabolism, thereby optimizing resource allocation and enhancing transplant adaptability. This study provides a scientific basis for hormonal regulation and ecological restoration in the artificial transplantation of mangroves.

Key words: Kandelia obovata, LC-MS/MS, plant hormones, metabolomics, stress, multi-hormone synergistic regulation

CLC Number: 

  • P735