Actinobacteria are a large group of Gram-positive bacteria, mainly distributed in soil but also in a wide range of host plants. Plant growth-promoting actinobacteria (PGPA) include Streptomyces, Actinomadura, Microbispora, Micromonospora, Nocardia, Nonomurea, Mycobacterium, Frankia, Actinoplanes, Saccharopolyspora and Verrucosispora, etc. Among the tens of thousands of microbial-derived bioactive substances that have been discovered, about 70% are secondary metabolites synthesized by Actinobacteria, which have broad application potentials for promoting plant growth. PGPA can provide nutrients available to plants to promote plant growth by secreting indoleacetic acid (IAA), producing siderophores, dissolving phosphorus, and fixing nitrogen. PGPA has active antibacterial substances and releases chitinase, cellulase, protease, etc. to antagonize pathogenic microorganisms and improve the stress resistance of plants. Therefore, studying the interaction between PGPA and plants plays an essential role in the development of sustainable agriculture.
Beneficial environmental microorganisms like PGPA have an essential role in the endophytic or root-associated microbiota of plants. PGPA can promote plant growth by facilitating the availability and uptake of soil nutrients. Therefore, the use of such bacteria may be an effective way to stabilize and increase yields and improve stress tolerance efficiency in dryland agriculture. In addition, understanding the changes in the microbiome of plants in different environments (e.g., drought, salt stress, high temperature, disease, insect damage, etc.) is necessary to reveal the mechanisms that promote plant growth and stress tolerance. Improving our understanding of the PGPA, may also help to develop better biofertilizers.
This Research Topic aims to explore the role of actinobacteria in different plant growth environments and to share new findings on actinobacteria-plant interactions. In addition, we welcome submissions on (but not limited to) actinobacterial isolation and characterization, genomic analysis, and agronomic applications. Submissions of original research articles, and review articles related to plant-associated actinobacterial communities are welcome and will help us to gather significant Information in this field.
Potential topics include:
• Plant-Actinobacteria interaction;
• Actinobacterial genome;
• Biodiversity of Actinobacteria in normal as well as extreme habitats;
• Effect of the Actinobacteria in shaping the rhizospheric or endophytic microbiome;
• PGP mechanisms (solubilization, nitrogen fixation, and phytohormone production);
• Beneficial actinobacteria for nutrient uptake, cycling, and soil fertility;
• Actinobacteria in improving crop productivity;
• Actinobacteria-mediated drought/salinity/heat/cold stress in plants;
• Mechanisms by which actinobacteria improve plant growth;
• Biofertilizers and biopesticides.
• Role of actinobacterial metabolites in disease management.
Actinobacteria are a large group of Gram-positive bacteria, mainly distributed in soil but also in a wide range of host plants. Plant growth-promoting actinobacteria (PGPA) include Streptomyces, Actinomadura, Microbispora, Micromonospora, Nocardia, Nonomurea, Mycobacterium, Frankia, Actinoplanes, Saccharopolyspora and Verrucosispora, etc. Among the tens of thousands of microbial-derived bioactive substances that have been discovered, about 70% are secondary metabolites synthesized by Actinobacteria, which have broad application potentials for promoting plant growth. PGPA can provide nutrients available to plants to promote plant growth by secreting indoleacetic acid (IAA), producing siderophores, dissolving phosphorus, and fixing nitrogen. PGPA has active antibacterial substances and releases chitinase, cellulase, protease, etc. to antagonize pathogenic microorganisms and improve the stress resistance of plants. Therefore, studying the interaction between PGPA and plants plays an essential role in the development of sustainable agriculture.
Beneficial environmental microorganisms like PGPA have an essential role in the endophytic or root-associated microbiota of plants. PGPA can promote plant growth by facilitating the availability and uptake of soil nutrients. Therefore, the use of such bacteria may be an effective way to stabilize and increase yields and improve stress tolerance efficiency in dryland agriculture. In addition, understanding the changes in the microbiome of plants in different environments (e.g., drought, salt stress, high temperature, disease, insect damage, etc.) is necessary to reveal the mechanisms that promote plant growth and stress tolerance. Improving our understanding of the PGPA, may also help to develop better biofertilizers.
This Research Topic aims to explore the role of actinobacteria in different plant growth environments and to share new findings on actinobacteria-plant interactions. In addition, we welcome submissions on (but not limited to) actinobacterial isolation and characterization, genomic analysis, and agronomic applications. Submissions of original research articles, and review articles related to plant-associated actinobacterial communities are welcome and will help us to gather significant Information in this field.
Potential topics include:
• Plant-Actinobacteria interaction;
• Actinobacterial genome;
• Biodiversity of Actinobacteria in normal as well as extreme habitats;
• Effect of the Actinobacteria in shaping the rhizospheric or endophytic microbiome;
• PGP mechanisms (solubilization, nitrogen fixation, and phytohormone production);
• Beneficial actinobacteria for nutrient uptake, cycling, and soil fertility;
• Actinobacteria in improving crop productivity;
• Actinobacteria-mediated drought/salinity/heat/cold stress in plants;
• Mechanisms by which actinobacteria improve plant growth;
• Biofertilizers and biopesticides.
• Role of actinobacterial metabolites in disease management.
