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Evidence of Cooperative Interactions between Rhizobacteria and Wood-Decaying Fungi and Their Effects on Maize Germination and Growth

Author

Listed:
  • Ricardo Rocha

    (Centre for Environmental and Marine Studies (CESAM), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
    These authors contributed equally to this work.)

  • Cátia Venâncio

    (Centre for Environmental and Marine Studies (CESAM), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
    These authors contributed equally to this work.)

  • Paulo Cardoso

    (Centre for Environmental and Marine Studies (CESAM), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal)

  • João Lourenço

    (Tecniferti®, Rua de Ourém, Lote 14, 2º I, Almoinha Grande, 2416-903 Leiria, Portugal)

  • Etelvina Figueira

    (Centre for Environmental and Marine Studies (CESAM), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal)

Abstract

Advances in soil microbial communities are driving agricultural practices towards ecological sustainability and productivity, with engineering microbial communities significantly contributing to sustainable agriculture. This study explored the combined effects of two white-rot fungi ( Trametes sp. and Pleurotus sp.) and six rhizobacterial strains belonging to four genera ( Acinetobacter sp., Enterobacter sp., Flavobacterium sp., and Pseudomonas sp.) on maize growth and soil enzymatic activity over a 14-day period. At the plant level, germination, fresh and dry mass of the aerial and root parts, length, and stage of development of the stem, as well as the chlorophyll content, were evaluated. Furthermore, soil dehydrogenase, acid and alkaline phosphatases, pH, and electrical conductivity were evaluated. Rot fungi induced distinct effects on maize germination, with Pleurotus sp. strongly suppressing maize germination by 40% relative to that of the control. The isolated bacterial strains, except Enterobacter sp. O8, and 8 of the 12 fungus + bacterial strain combinations induced germination rates higher than those of the control (≥40%). Combinations of Flavobacterium sp. I57 and Pseudomonas sp. O81 with the rot fungus Pleurotus sp. significantly improved plant shoot length (from 28.0 to 37.0 cm) and developmental stage (fourth leaf length increase from 10.0 to 16.8 cm), respectively, compared with the same bacteria alone or in combination with the rot fungus Trametes sp. In the soil, the presence of both fungi appeared to stabilize phosphatase activity compared to their activity when only bacteria were present, while also promoting overall dehydrogenase enzymatic activity in the soil. Integrating all parameters, Trametes sp. rot fungus + Enterobacter sp. O8 may be a potential combination to be explored in the context of agricultural production, and future studies should focus on the consistency of this combination’s performance over time and its effectiveness in the field.

Suggested Citation

  • Ricardo Rocha & Cátia Venâncio & Paulo Cardoso & João Lourenço & Etelvina Figueira, 2024. "Evidence of Cooperative Interactions between Rhizobacteria and Wood-Decaying Fungi and Their Effects on Maize Germination and Growth," Agriculture, MDPI, vol. 14(7), pages 1-18, July.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:7:p:1170-:d:1437318
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    References listed on IDEAS

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    1. Chad J. Penn & James J. Camberato, 2019. "A Critical Review on Soil Chemical Processes that Control How Soil pH Affects Phosphorus Availability to Plants," Agriculture, MDPI, vol. 9(6), pages 1-18, June.
    2. Mondani, Farzad & Khani, Kianoosh & Honarmand, Saeid Jalali & Saeidi, Mohsen, 2019. "Evaluating effects of plant growth-promoting rhizobacteria on the radiation use efficiency and yield of soybean (Glycine max) under water deficit stress condition," Agricultural Water Management, Elsevier, vol. 213(C), pages 707-713.
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