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Soares FS, Rangel de Souza ALS, de Souza SA, de Souza Vespoli L, Pinto VB, Matiello L, da Silva FR, Menossi M, de Souza Filho GA. Fine-Tuning of Arabidopsis thaliana Response to Endophytic Colonization by Gluconacetobacter diazotrophicus PAL5 Revealed by Transcriptomic Analysis. PLANTS (BASEL, SWITZERLAND) 2024; 13:1719. [PMID: 38999559 PMCID: PMC11244368 DOI: 10.3390/plants13131719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 06/01/2024] [Accepted: 06/16/2024] [Indexed: 07/14/2024]
Abstract
Gluconacetobacter diazotrophicus is a diazotrophic endophytic bacterium that promotes the growth and development of several plant species. However, the molecular mechanisms activated during plant response to this bacterium remain unclear. Here, we used the RNA-seq approach to understand better the effect of G. diazotrophicus PAL5 on the transcriptome of shoot and root tissues of Arabidopsis thaliana. G. diazotrophicus colonized A. thaliana roots and promoted growth, increasing leaf area and biomass. The transcriptomic analysis revealed several differentially expressed genes (DEGs) between inoculated and non-inoculated plants in the shoot and root tissues. A higher number of DEGs were up-regulated in roots compared to shoots. Genes up-regulated in both shoot and root tissues were associated with nitrogen metabolism, production of glucosinolates and flavonoids, receptor kinases, and transcription factors. In contrast, the main groups of down-regulated genes were associated with pathogenesis-related proteins and heat-shock proteins in both shoot and root tissues. Genes encoding enzymes involved in cell wall biogenesis and modification were down-regulated in shoots and up-regulated in roots. In contrast, genes associated with ROS detoxification were up-regulated in shoots and down-regulated in roots. These results highlight the fine-tuning of the transcriptional regulation of A. thaliana in response to colonization by G. diazotrophicus PAL5.
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Affiliation(s)
- Fabiano Silva Soares
- Laboratório de Biotecnologia (Unidade de Biologia Integrativa), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
| | - Ana Lídia Soares Rangel de Souza
- Laboratório de Biotecnologia (Unidade de Biologia Integrativa), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
| | - Suzane Ariádina de Souza
- Laboratório de Biotecnologia (Unidade de Biologia Integrativa), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
| | - Luciano de Souza Vespoli
- Laboratório de Biotecnologia (Unidade de Biologia Integrativa), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
| | - Vitor Batista Pinto
- Laboratório de Biologia Celular e Tecidual, UENF, Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
| | - Lucia Matiello
- Instituto de Biologia, Departamento de Genética, Evolução, Microbiologia e Imunologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo 13083-970, Brazil
| | - Felipe Rodrigues da Silva
- Instituto de Biologia, Departamento de Genética, Evolução, Microbiologia e Imunologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo 13083-970, Brazil
- Embrapa Agricultura Digital, Campinas, São Paulo 13083-886, Brazil
| | - Marcelo Menossi
- Instituto de Biologia, Departamento de Genética, Evolução, Microbiologia e Imunologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo 13083-970, Brazil
| | - Gonçalo Apolinário de Souza Filho
- Laboratório de Biotecnologia (Unidade de Biologia Integrativa), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
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Thiebaut F, Urquiaga MCDO, Rosman AC, da Silva ML, Hemerly AS. The Impact of Non-Nodulating Diazotrophic Bacteria in Agriculture: Understanding the Molecular Mechanisms That Benefit Crops. Int J Mol Sci 2022; 23:ijms231911301. [PMID: 36232602 PMCID: PMC9569789 DOI: 10.3390/ijms231911301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/19/2022] [Accepted: 09/21/2022] [Indexed: 11/16/2022] Open
Abstract
Agriculture is facing increasing challenges with regard to achieving sustainable growth in productivity without negatively impacting the environment. The use of bioinoculants is emerging as a sustainable solution for agriculture, especially bioinoculants based on diazotrophic bacteria. Brazil is at the forefront of studies intended to identify beneficial diazotrophic bacteria, as well as in the molecular characterization of this association on both the bacterial and plant sides. Here we highlight the main advances in molecular studies to understand the benefits brought to plants by diazotrophic bacteria. Different molecular pathways in plants are regulated both genetically and epigenetically, providing better plant performance. Among them, we discuss the involvement of genes related to nitrogen metabolism, cell wall formation, antioxidant metabolism, and regulation of phytohormones that can coordinate plant responses to environmental factors. Another important aspect in this regard is how the plant recognizes the microorganism as beneficial. A better understanding of plant–bacteria–environment interactions can assist in the future formulation of more efficient bioinoculants, which could in turn contribute to more sustainable agriculture practices.
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