Pseudomonas chlororaphis metabolites as biocontrol promoters of plant health and improved crop yield

Raio, A.; Puopolo, Gerardo

doi:10.1007/s11274-021-03063-w

Cited by 32 publications

(17 citation statements)

References 53 publications

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“…Within this phylum, the genera Pseudomonas and Ralstonia predominated considering the three sites analyzed. While Pseudomonas strains can promote plant growth through diverse mechanisms, such as acting as a biocontrol agent [ 52 ], strains belonging to the Ralstonia genus comprise phytopathogenic species, currently clustered in the Ralstonia solanacearum species complex (RSSC), able to affect more than 200 plant species [ 53 ].…”

Section: Discussionmentioning

confidence: 99%

Unraveling the Tropaeolum majus L. (Nasturtium) Root-Associated Bacterial Community in Search of Potential Biofertilizers

2022

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Although Tropaeolum majus (nasturtium) is an agriculturally and economically important plant, especially due to the presence of edible flowers and its medicinal properties, its microbiome is quite unexplored. Here, the structure of the total bacterial community associated with the rhizosphere, endosphere and bulk soil of T. majus was determined by 16S rRNA amplicon metagenomic sequencing. A decrease in diversity and richness from bulk soil to the rhizosphere and from the rhizosphere to the endosphere was observed in the alpha diversity analyses. The phylum Proteobacteria was the most dominant in the bacteriome of the three sites evaluated, whereas the genera Pseudomonas and Ralstonia showed a significantly higher relative abundance in the rhizosphere and endosphere communities, respectively. Plant growth-promoting bacteria (236 PGPB) were also isolated from the T. majus endosphere, and 76 strains belonging to 11 different genera, mostly Serratia, Raoultella and Klebsiella, showed positive results for at least four out of six plant growth-promoting tests performed. The selection of PGPB associated with T. majus can result in the development of a biofertilizer with activity against phytopathogens and capable of favoring the development of this important plant.

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Section: Discussionmentioning

confidence: 99%

Unraveling the Tropaeolum majus L. (Nasturtium) Root-Associated Bacterial Community in Search of Potential Biofertilizers

2022

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“…The increase in Bacteroidetes and Proteobacteria has a positive effect on the soil carbon cycle [60,62]. Both Gemmatimonadetes and Pseudomonas contain a variety of taxa that inhibit pathogenic microorganisms [63,64]. The relative abundance of Gemmatimonadetes decreased significantly after adding straw, while the relative abundance of Pseudomonas increased significantly when straw was returned to the field at a high level.…”

Section: Discussionmentioning

confidence: 99%

Effects of Short-Term Rice Straw Return on the Soil Microbial Community

et al. 2021

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Rice straw is a byproduct of agricultural production and an important agricultural resource. However, rice straw has not yet been effectively used, and incorrect treatment methods (such as burning in the field) can cause serious damage to the environment. Studies have shown that straw returning is beneficial to soil, but there have been few studies focused on the effect of the amount of short-term straw returned on the soil microbial community. This study evaluates 0%, 50%, 75%, and 100% rice straw returned to the field on whether returning different amounts of straw in the short term would affect the diversity and composition of the soil microbial community and the correlation between bacteria and fungi. The results show that the amount of straw returned to the field is the main factor that triggers the changes in the abundance and composition of the microbial community in the paddy soil. A small amount of added straw (≤ 50% straw added) mainly affects the composition of the bacterial community, while a larger amount of added straw (> 50% straw added) mainly affects the composition of the fungal community. Returning a large amount of straw increases the microbial abundance related to carbon and iron cycles in the paddy soil, thus promoting the carbon and iron cycle processes to a certain extent. In addition, network analysis shows that returning a large amount of straw also increases the complexity of the microbial network, which may encourage more microbes to be niche-sharing and comprehensively improve the ecological environment of paddy soil. This study may provide some useful guidance for rice straw returning in northeast China.

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“…Pseudozyma flocculosa produces a compound that induces a rapid formation of cell collapse in the pathogen and is an effective BCA to control powdery mildew [60]. Pseudomonas chlororaphis (Guignard and Sauvageau) Bergey produces phenazines, pyrrolnitrine, 2-hexyl, 5-propyl resorcinol and hydrogen cyanide, siderophores, and a complex blend of volatile organic compounds that effectively contribute to the control of several plant pathogens and nematodes [61]. Fluorescent pseudomonads has been used to compete with several pathogenic fungi and bacteria [62].…”

Section: Suppressing Pathogensmentioning

confidence: 99%

Biological Control of Plant Diseases: An Evolutionary and Eco-Economic Consideration

Amalin

et al. 2021

Pathogens

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Biological control is considered as a promising alternative to pesticide and plant resistance to manage plant diseases, but a better understanding of the interaction of its natural and societal functions is necessary for its endorsement. The introduction of biological control agents (BCAs) alters the interaction among plants, pathogens, and environments, leading to biological and physical cascades that influence pathogen fitness, plant health, and ecological function. These interrelationships generate a landscape of tradeoffs among natural and social functions of biological control, and a comprehensive evaluation of its benefits and costs across social and farmer perspectives is required to ensure the sustainable development and deployment of the approach. Consequently, there should be a shift of disease control philosophy from a single concept that only concerns crop productivity to a multifaceted concept concerning crop productivity, ecological function, social acceptability, and economical accessibility. To achieve these goals, attempts should make to develop “green” BCAs used dynamically and synthetically with other disease control approaches in an integrated disease management scheme, and evolutionary biologists should play an increasing role in formulating the strategies. Governments and the public should also play a role in the development and implementation of biological control strategies supporting positive externality.

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Pseudomonas chlororaphis metabolites as biocontrol promoters of plant health and improved crop yield

Cited by 32 publications

References 53 publications

Unraveling the Tropaeolum majus L. (Nasturtium) Root-Associated Bacterial Community in Search of Potential Biofertilizers

Unraveling the Tropaeolum majus L. (Nasturtium) Root-Associated Bacterial Community in Search of Potential Biofertilizers

Effects of Short-Term Rice Straw Return on the Soil Microbial Community

Biological Control of Plant Diseases: An Evolutionary and Eco-Economic Consideration

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