Plant Growth-Promoting Microorganisms in Crop Nutrition and Production

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Crop Physiology and Crop Production".

Deadline for manuscript submissions: 31 July 2026 | Viewed by 457

Special Issue Editors


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Guest Editor
State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
Interests: applied microbiology; mycology; plant pathology
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Edible Fungi Center, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
Interests: exploration and genetic evolution of macrofungi germplasm resources; structural identification and activity evaluation of fungus natural active ingredients derived; biosynthesis and green manufacturing of active ingredients
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues, 

Global agricultural systems face the challenge of meeting the nutritional demands of a growing population while maintaining environmental sustainability. Plant growth-promoting microorganisms (PGPM), including rhizobacteria, endophytes, and mycorrhizal fungi, have emerged as promising biological tools for enhancing crop nutrition and productivity through diverse mechanisms such as nutrient mobilization, phytohormone production, and stress tolerance induction. Recent advances in microbiome research and omics technologies have revolutionized our understanding of plant–microbe interactions, revealing the complex networks governing these beneficial associations. However, translating fundamental discoveries into practical agricultural applications remains a critical challenge, necessitating interdisciplinary approaches that bridge molecular mechanisms with field-level implementation. 

This Special Issue aims to compile cutting-edge research on the applications of PGPM in sustainable crop production, encompassing mechanistic insights, technological innovations, and practical implementations. We welcome contributions that advance our understanding of microbial ecology in agricultural systems, develop novel biofertilizer formulations, and evaluate the efficacy of PGPM under diverse environmental conditions. The Special Issue aligns with the scope of Plants by addressing critical aspects of plant biology, crop physiology, and sustainable agriculture, providing a platform for researchers to share innovative solutions for enhancing crop nutrition and productivity through microbiological approaches. 

In this Special Issue, original research articles and reviews are welcome. Research areas may include, but are not limited to, the following: mechanisms of nutrient acquisition and mobilization by PGPM; development and formulation of microbial biofertilizers; plant–microbe–soil interactions in the rhizosphere; omics approaches for understanding the functions of PGPM; microbial enhancement of crop stress tolerance; biocontrol mechanisms integrated with plant nutrition; microbiome engineering for sustainable agriculture; field evaluations and practical applications of PGPM; regulatory and commercialization aspects of biofertilizers; and climate-smart agriculture through microbial interventions.

Dr. Yunpeng Gai
Dr. Hong-Kai Wang
Dr. Jianzhao Qi
Guest Editors

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Keywords

  • plant growth-promoting microorganisms
  • biofertilizers
  • rhizosphere microbiome
  • sustainable agriculture
  • nutrient mobilization
  • plant-microbe interactions
  • crop productivity
  • microbial inoculants

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Published Papers (1 paper)

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Research

24 pages, 6173 KB  
Article
Transcriptomic Comparison of Soybean Roots Inoculated with Different Rhizobium Strains During Early Symbiosis
by Qin Lin, Ziji Wu, Ruixin Xu, Jing Zhang, Min Deng, Tao Wang, Qi Zhang, Peiwu Li and Zhe Yan
Plants 2026, 15(9), 1417; https://doi.org/10.3390/plants15091417 - 6 May 2026
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Abstract
The symbiotic relationship between soybean and rhizobia facilitates nodulation and nitrogen fixation, providing a sustainable nutrient supply for increasing crop yields and reducing chemical fertilizer use. However, comparative studies on the conservation and strain-specificity of host gene expression regulated by different rhizobial strains [...] Read more.
The symbiotic relationship between soybean and rhizobia facilitates nodulation and nitrogen fixation, providing a sustainable nutrient supply for increasing crop yields and reducing chemical fertilizer use. However, comparative studies on the conservation and strain-specificity of host gene expression regulated by different rhizobial strains remain limited. Here, we performed a comparative analysis between the previously isolated strain, Bradyrhizobium ottawaense Bott 59, and the model strain, Bradyrhizobium diazoefficiens USDA 110. Symbiotic phenotypes were evaluated after inoculation, and a root transcriptomic analysis was conducted at 3 dpi to assess early molecular responses. At 21 dpi, Bott 59-inoculated plants outperformed plants inoculated with USDA 110 in nodule number, nitrogenase activity, and biomass. Transcriptomic analysis revealed conserved host responses to both rhizobial strains, including NIN-mediated signaling, AON signaling, and the biosynthesis of phenylpropanoids and brassinosteroids. Further analysis revealed that Bott 59 specifically induced the expression of genes involved in isoflavonoid and flavonoid biosynthesis, including those encoding I2H, and HI4OMT. Moreover, Bott 59 triggered more pronounced transcriptional reprogramming in auxin, cytokinin, and jasmonic acid signaling pathways, along with differential expression of a broader set of transcription factor genes. Collectively, this study systematically unravels the conserved and strain-specific transcriptional regulatory events underlying host–rhizobium interactions. Our findings provide valuable theoretical insights and transcriptomic resources for further dissecting the molecular mechanisms of symbiotic nitrogen fixation (SNF), as well as for the targeted genetic improvement of crop nodulation and nitrogen fixation efficiency. Full article
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