Growth promotion of lettuce (Lactuca sativa) by fungal volatile organic compounds isolated from orchard soils

IF 2.6 3区生物学 Q3 MICROBIOLOGY

Archives of Microbiology Pub Date : 2025-08-18 DOI:10.1007/s00203-025-04427-8

Waleed Asghar, Daisuke Namiki, Ryota Kataoka

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Abstract

Volatile organic compounds (VOCs) and volatile metabolites emitted by microorganisms is of major significance in enhancing plant growth and controlling harmful microorganisms; however, our understanding of these factors remain limited. Therefore, in this study, we aimed to collect new fungal strains from orchard rhizosphere soil and determine the role of VOCs emitted by these strains. We conducted a two-compartment plate assay in a controlled environment to assess the potential of the fungal strains to stimulate plant growth by emitting VOCs. We observed that different fungal strains released various VOCs and demonstrated their ability to promote plant growth by releasing VOCs in the shared atmosphere. Exposure to VOCs emitted by Mortierella spp. and Curvularia spp., significantly enhanced lettuce growth in the presence of CO₂ granules, compared to the control group, which lacked fungal isolates. Spectrometric analysis showed that Mortierella spp. and Curvularia spp. released 33 VOCs, including N-nonadecanol, 2-pentene 2,3-dimethyl, decane, nonane, phenylethyl alcohol, 3-penten-2-one, 4-methyl, and butanoic acid. The fungal strains isolated from the orchard rhizosphere soil produced multiple VOCs, and their emissions positively influenced lettuce plant growth.

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从果园土壤中分离的真菌挥发性有机物对生菜生长的促进作用

微生物排放的挥发性有机化合物（VOCs）和挥发性代谢物对促进植物生长和控制有害微生物具有重要意义；然而，我们对这些因素的了解仍然有限。因此，在本研究中，我们旨在从果园根际土壤中收集新的真菌菌株，并确定这些菌株释放的挥发性有机化合物的作用。我们在受控环境下进行了双室平板试验，以评估真菌菌株通过释放挥发性有机化合物刺激植物生长的潜力。我们观察到不同的真菌菌株释放不同的挥发性有机化合物，并证明了它们通过释放共享大气中的挥发性有机化合物来促进植物生长的能力。暴露于Mortierella spp.和Curvularia spp.释放的挥发性有机化合物中，与缺乏真菌分离的对照组相比，在CO2颗粒存在的情况下，生菜的生长显著增强。光谱分析表明，Mortierella spp.和Curvularia spp.释放了33种挥发性有机化合物，包括n-壬烷醇、2-戊烯2,3-二甲基、癸烷、壬烷、苯乙醇、3-戊烯-2- 1、4-甲基和丁酸。从果园根际土壤中分离的真菌菌株产生多种挥发性有机化合物，其排放对生菜植株生长有积极影响。

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来源期刊

Archives of Microbiology 生物-微生物学

CiteScore

4.90

自引率

3.60%

发文量

601

审稿时长

3 months

期刊介绍： Research papers must make a significant and original contribution to microbiology and be of interest to a broad readership. The results of any experimental approach that meets these objectives are welcome, particularly biochemical, molecular genetic, physiological, and/or physical investigations into microbial cells and their interactions with their environments, including their eukaryotic hosts. Mini-reviews in areas of special topical interest and papers on medical microbiology, ecology and systematics, including description of novel taxa, are also published. Theoretical papers and those that report on the analysis or ''mining'' of data are acceptable in principle if new information, interpretations, or hypotheses emerge.