Investigating PGPR bacteria for their competence to protect hybrid maize from the factor drought stress

Kálmán, Csaba Dániel; Nagy, Zoltán; Berėnyi, Attila; Kiss, E.; Posta, Katalin

doi:10.1007/s42976-023-00388-0

Cited by 7 publications

(5 citation statements)

References 61 publications

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“…After the soil pot assay, plants did not show significant changes in their development due to inoculation. Since this assay was aimed at evaluating colonization, we used 10 4 cells/g of soil to inoculate pots, which is 100 to 1000-fold lower that the amount normally used in inoculation experiments aimed at evaluating PGP traits (Efthimiadou et al 2020; Kálmán et al 2023). Additionally, the experimental period was insufficient to address the effect of inoculation in plant developmental stages that impact productivity such as flowering, pollination and grain filling (Aslam et al 2015; Nafziger 2016).…”

Section: Discussionmentioning

confidence: 99%

Biofilm formation and maize root-colonization of seed-endophytic Bacilli isolated from native maize landraces

Gastélum,

Ángeles,

Arellano-Wattenbarger

et al. 2024

Preprint

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Agricultural microbiology seeks to replace the use of agrochemicals with microbe-based products. Plant growth-promoting bacteria (PGPB) are often selected based on their functionsin vitro, and then, their effect on plant development is tested. However, this approach neglects the study of their survival in soil, root-colonization, and the monitoring of beneficial functions in the rhizosphere. This could explain the recurrent lack of success in the transition from lab tests to field applications of natural isolates from novel habitats. In our recent studies, we found that native maize seeds from traditional agroecosystems carry endophytic bacterial communities that are dominated by members of the class Bacilli. As an approach to grasp their PGP potential, we developed protocols to test maize root-colonization of these natural isolates in 1) a short-term hydroponics assayin vitroand 2) a long-term assay in non-sterile soil pots. Our results show thatin vitrobiofilm formation was only partially associated to short-term colonizationin vitro; furthermore, long-term root-colonization in soil pots was not correlated to thein vitroassays. This work highlights the necessity to incorporate root-colonization assays as part of the research strategies in the search for PGPB natural isolates from unexplored habitats, towards the generation of inoculants with increased success in the field.

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Section: Discussionmentioning

confidence: 99%

Biofilm formation and maize root-colonization of seed-endophytic Bacilli isolated from native maize landraces

Gastélum,

Ángeles,

Arellano-Wattenbarger

et al. 2024

Preprint

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“…Some PGPRs can increase crop yield by improving tolerance to abiotic stressors and phytopathogens. Kálmán et al (2023) also mentioned in their study that PGPRs help reduce the negative effects of drought and stressful thermal conditions on plants. The synthesis of the ACC deaminase enzyme is the most studied among the different PGP traits involved in the drought tolerance of plants.…”

Section: Plant Growth-promoting Rhizobacteria (Pgpr)mentioning

confidence: 97%

“…Among these beneficial microscopic organisms are PGPRs that colonize plant roots. Thanks to their mechanisms of action, PGPR can improve crop yields under both stressful and non-stressful conditions ( Kálmán et al, 2023 ; Nadeem et al, 2010 ; Noumavo et al, 2016 ). PGPRs have demonstrated their ability to provide plants with essential nutrients to enhance their productivity, protect plants from stresses of abiotic and biotic origin, and prevent attacks by plant pathogens ( Agbodjato et al, 2021 ; Fasusi, Cruz & Babalola, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Promoting sustainable agriculture by exploiting plant growth-promoting rhizobacteria (PGPR) to improve maize and cowpea crops

Agbodjato,

Babalola

2024

PeerJ

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Maize and cowpea are among the staple foods most consumed by most of the African population, and are of significant importance in food security, crop diversification, biodiversity preservation, and livelihoods. In order to satisfy the growing demand for agricultural products, fertilizers and pesticides have been extensively used to increase yields and protect plants against pathogens. However, the excessive use of these chemicals has harmful consequences on the environment and also on public health. These include soil acidification, loss of biodiversity, groundwater pollution, reduced soil fertility, contamination of crops by heavy metals, etc. Therefore, essential to find alternatives to promote sustainable agriculture and ensure the food and well-being of the people. Among these alternatives, agricultural techniques that offer sustainable, environmentally friendly solutions that reduce or eliminate the excessive use of agricultural inputs are increasingly attracting the attention of researchers. One such alternative is the use of beneficial soil microorganisms such as plant growth-promoting rhizobacteria (PGPR). PGPR provides a variety of ecological services and can play an essential role as crop yield enhancers and biological control agents. They can promote root development in plants, increasing their capacity to absorb water and nutrients from the soil, increase stress tolerance, reduce disease and promote root development. Previous research has highlighted the benefits of using PGPRs to increase agricultural productivity. A thorough understanding of the mechanisms of action of PGPRs and their exploitation as biofertilizers would present a promising prospect for increasing agricultural production, particularly in maize and cowpea, and for ensuring sustainable and prosperous agriculture, while contributing to food security and reducing the impact of chemical fertilizers and pesticides on the environment. Looking ahead, PGPR research should continue to deepen our understanding of these microorganisms and their impact on crops, with a view to constantly improving sustainable agricultural practices. On the other hand, farmers and agricultural industry players need to be made aware of the benefits of PGPRs and encouraged to adopt them to promote sustainable agricultural practices.

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“…Materials like melatonin, which can promote the photosynthetic process, improve enzyme activities, and increase the production of ATP, can support heat-stressed plants [159]. The harmful effects of heat stress on plants can also be alleviated by applying certain elements (e.g., Ca, Se, and Si), materials, and plant-growth-promoting rhizobacteria (PGPR) [160,161]. An overview of materials that may be used is given in Table 1.…”

Section: Mechanisms Of the Plant Response To Heat Stressmentioning

confidence: 99%

Nano-Food Farming Approaches to Mitigate Heat Stress under Ongoing Climate Change: A Review

El-Ramady,

Prokisch,

El-Mahrouk

et al. 2024

Agriculture

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Increased heat stress is a common feature of global climate change and can cause adverse impacts on crops from germination through maturation and harvest. This review focuses on the impacts of extreme heat (>35 °C) on plants and their physiology and how they affect food and water security. The emphasis is on what can be done to minimize the negative effects of heat stress, which includes the application of various materials and approaches. Nano-farming is highlighted as one promising approach. Heat is often combined with drought, salinity, and other stresses, which together affect the whole agroecosystem, including soil, plants, water, and farm animals, leading to serious implications for food and water resources. Indeed, there is no single remedy or approach that can overcome such grand issues. However, nano-farming can be part of an adaptation strategy. More studies are needed to verify the potential benefits of nanomaterials but also to investigate any negative side-effects, particularly under the intensive application of nanomaterials, and what problems this might create, including potential nanotoxicity.

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Investigating PGPR bacteria for their competence to protect hybrid maize from the factor drought stress

Cited by 7 publications

References 61 publications

Biofilm formation and maize root-colonization of seed-endophytic Bacilli isolated from native maize landraces

Biofilm formation and maize root-colonization of seed-endophytic Bacilli isolated from native maize landraces

Promoting sustainable agriculture by exploiting plant growth-promoting rhizobacteria (PGPR) to improve maize and cowpea crops

Nano-Food Farming Approaches to Mitigate Heat Stress under Ongoing Climate Change: A Review

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