Endophytic bacteria naturally inhabiting commercial maize seeds occupy different niches and are efficient plant growth-promoting agents

Bomfim, Cláudia Silva Gomes; Silva, Valéria Borges da; Cursino, Luiz Henrique Santos; Mattos, Wesley da Silva; Santos, Jéssica Caroline Souza; Souza, Layane Silva Barbosa de; Dantas, B. F.; Freitas, Ana Dolores Santiago de; Fernandes‐Júnior, Paulo Ivan

doi:10.1007/s13199-020-00701-z

Cited by 16 publications

(13 citation statements)

References 59 publications

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“…Authors such as Emami et al [ 40 ] or Bomfim et al [ 41 ], suggest that promoting successful growth must be linked to the diverse mechanisms that operate synergistically during plant development, not just to one of them. Successful remediation by the selected strains will be a result of the combined activities of the microorganism.…”

Section: Discussionmentioning

confidence: 99%

Selection of Mercury-Resistant PGPR Strains Using the BMRSI for Bioremediation Purposes

González

Mora

Probanza

et al. 2021

IJERPH

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Heavy metal pollution of soil, particularly by mercury (Hg), is a problem that can seriously affect the environment and human health. For this reason, it is necessary to take steps to remediate these environments, prevent potential adverse effects, and restore these areas for subsequent use in agriculture, industry, ranching, and forestry. The present study has selected 40 bacterial strains from rhizosphere and bulk soil that grow naturally in high Hg-contaminated soils from the Almadén mining district in Ciudad Real, Spain. With the objective of evaluating the potential use of these strains in phyto-rhizoremediation, an evaluation and statistical analysis of their PGPR (Plant-Growth-Promoting Rhizobacteria) activity at different levels of Hg was carried out as the first condition of selection for their potential use in bioremediation. In addition, a Hg MBC (Maximum Bactericidal Concentration) was performed with the aim of selecting the strains with high Hg tolerance. Finally, strains with potential biotechnological use have been proposed according to the Bio-Mercury Remediation Suitability Index (BMRSI) criteria, which consider indole-3-acetic acid (IAA) production, acid 1- aminocyclopropane-1-carboxylic deaminase (ACCd) activity, phosphates solubilization, and siderophore production measured in the presence of Hg, as well as its MBC to Hg. The strains selected for further in vivo and in situ processes must reach at least an MBC (Hg) > 100 μg/mL and BMRSI ≥ 6.5.

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Section: Discussionmentioning

confidence: 99%

Selection of Mercury-Resistant PGPR Strains Using the BMRSI for Bioremediation Purposes

González

Mora

Probanza

et al. 2021

IJERPH

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“…In addition, several of the methodologies that contribute to bacterial genomic characterization are based on characteristic variations in genomic restriction sites, such as the occurrence of insertions and deletions, repetitions of DNA sequences or micro-satellites, single nucleotide polymorphisms, or other sequence variations distributed in bacterial genomes, which can determine a profile of DNA bands [ 49 ]. These banding patterns or DNA fingerprints are then used to compare isolates in order to assess the intraspecific diversity present in the plant microbiome [ 19 , 50 ]. Most DNA fingerprinting techniques are based on the presence or absence of restriction sites, while others are based on the homologies of short oligonucleotide primers [ 51 ].…”

Section: Plant Microbiomes and Prospection Of Diazotrophic Bacteriamentioning

confidence: 99%

The Impact of Non-Nodulating Diazotrophic Bacteria in Agriculture: Understanding the Molecular Mechanisms That Benefit Crops

Thiebaut

Urquiaga

Rosman

et al. 2022

IJMS

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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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“…The Seed Endophytic Bacteria Approach Bomfim et al (2020) consider that the isolation of seed endophytic bacteria is a promising approach, assuming that seeds harbor a specific microbiome of agro-industrial interest.…”

Section: Recruitment Of Seed Endophytic Bacteriamentioning

confidence: 99%

“…Numerous studies demonstrate the relevance of seed endophytic bacteria to increase growth and plant yield. These relate to rice (Ruiza et al, 2011;Hardoim et al, 2012;Shahzad et al, 2016Shahzad et al, , 2017cVerma et al, 2017;Krishnamoorthy et al, 2020), eucalyptus (Ferreira et al, 2008), maize (Rosenblueth et al, 2012;Liu et al, 2013;Bodhankar et al, 2017;Bomfim et al, 2020), wheat (Díaz Herrera et al, 2016), soybeans (Oehrle et al, 2000), tobacco (Mastretta et al, 2009), Phragimates australis (White et al, 2017), tomato (Xu et al, 2014), chickpea (Mukherjee et al, 2020), peanut (Li L. et al, 2019), or millet (Kumar et al, 2020).…”

Section: Promotion Of Plant Developmentmentioning

confidence: 99%

Combining the Seed Endophytic Bacteria and the Back to the Future Approaches for Plant Holonbiont Breeding

L'Hoir

Duponnois

2021

Front. Agron.

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Given the limits of intensive agriculture (pollution, degradation of biodiversity, or soil desertification), it is necessary to develop sustainable alternatives to respond to future agricultural demand. Among these sustainable alternatives is the use of microbial biostimulants. Despite convincing scientific studies on them, their agricultural use remains minor. This can be explained by the lack of efficiency and reliability of their use. This review proposes to develop efficient microbial biostimulants based on the combination of two approaches, namely that of endophytic bacteria from seeds and the Back to the Future approach. Seed endophytic bacteria have a major agroindustrial potential insofar as they stand out from other microbial agents by their resistance, competitiveness, efficiency, and vertical transmission. Contrary to modern cultivars, non-domesticated plants harbor microbiomes which have not been impacted by the processes of domestication and agriculture intensification. The Back to the Future suggests therefore to use interesting microorganisms isolated from non-domesticated plants and to integrate them into modern cultivars. This could result in the rehabilitation of modern microbiomes and lead to make crop cultures more resistant and resilient. The idea consisting in the combination of both approaches aims at obtaining optimized microbiomes. Particular emphasis is placed on integrating these innovative microbiomes into variety breeding programs. Indeed, given the importance of plant-microorganism interactions, particularly from an agronomic point of view, taking the hologenome into account as a unit of selection in breeding programs is essential. This integrative and unprecedented approach to designing breeding programs is promising with a view to reconciling productivity and preservation of agroecosystems.

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Endophytic bacteria naturally inhabiting commercial maize seeds occupy different niches and are efficient plant growth-promoting agents

Cited by 16 publications

References 59 publications

Selection of Mercury-Resistant PGPR Strains Using the BMRSI for Bioremediation Purposes

Selection of Mercury-Resistant PGPR Strains Using the BMRSI for Bioremediation Purposes

The Impact of Non-Nodulating Diazotrophic Bacteria in Agriculture: Understanding the Molecular Mechanisms That Benefit Crops

Combining the Seed Endophytic Bacteria and the Back to the Future Approaches for Plant Holonbiont Breeding

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