Biocontrol and plant growth-promoting ability of plant-associated bacteria from tomato (Lycopersicum esculentum) under field condition

2019 ◽  
Vol 136 ◽  
pp. 103713 ◽  
Author(s):  
Natarajan Amaresan ◽  
Velusamy Jayakumar ◽  
Krishna Kumar ◽  
Nooruddin Thajuddin
Keyword(s):  
Plant Growth ◽  
Field Condition ◽  
Lycopersicum Esculentum ◽  
Associated Bacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting

Phosphate-solubilizing peanut associated bacteria: screening for plant growth-promoting activities

2009 ◽  
Vol 329 (1-2) ◽  
pp. 421-431 ◽  
Author(s):  
Tania Taurian ◽  
María Soledad Anzuay ◽  
Jorge Guillermo Angelini ◽  
María Laura Tonelli ◽  
Liliana Ludueña ◽  
...  
Keyword(s):  
Plant Growth ◽  
Associated Bacteria ◽  
Plant Growth Promoting Activities ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Phosphate Solubilizing

scholarly journals Screening of epiphytic rhizosphere-associated bacteria in Argentinian Malbec and Cabernet-Sauvignon vineyards for potential use as biological fertilisers and pathogen-control agents

OENO One ◽  
2021 ◽  
Vol 55 (4) ◽  
pp. 145-157
Author(s):  
Mónica Oyuela Aguilar ◽  
Florencia Álvarez ◽  
Daniela Medeot ◽  
Edgardo Jofré ◽  
Liliana Semorile ◽  
...  
Keyword(s):  
Plant Growth ◽  
Cabernet Sauvignon ◽  
Bacterial Isolates ◽  
Associated Bacteria ◽  
Biological Potential ◽  
Plant Growth Promoting ◽  
Pathogen Control ◽  
Pgp Activities ◽  
Growth Promoting ◽  
Potential Use

The rhizosphere-associated microbiome has diverse functions that support plant growth and health, varying among plant species, vegetation growth stages and environmental habitats. This microbiome includes a group of bacteria denominated plant growth-promoting rhizobacteria (PGPR) which can colonize plant roots. Certain PGPR isolates improve the ability of plants to adapt to a stressful environment. In this study, we collected and characterised the rhizosphere-associated bacteria, or epiphytic rhizobacteria, from Malbec and Cabernet-Sauvignon vineyards from the main wine-producing provinces of Argentina to analyse their potential use as biologic fertilisers and/or as pathogen-control agents. A total of 170 bacterial isolates were obtained, distributed into eleven different genera and classified into three phyla, Proteobacteria, Actinobacteria and Firmicutes. The in vitro analysis for plant-growth-promoting (PGP) activities demonstrated that a significant number of bacterial isolates had one or more of these traits. The Pseudomonas was the genus with the highest number of isolates and PGP activities, followed by the Arthrobacter, Serratia, Bacillus andPantoea. We observed that bacterial isolates identified as Bacillus exhibited a remarkable production of hydrolytic enzymes related to biocontrol activities. Biocontrol trials from the Bacillus collection revealed that at least five isolates were able to inhibit the fungal growth of Botrytis cinerea and Alternaria alternata. The results obtained suggest the biological potential of each isolate and the relevance of proceeding to greenhouse and field assays to obtain long-term environmentally compatible bio-products for vineyard management.

Studies on Plant Growth Promoting Properties of Fruit-Associated Bacteria from Elettaria cardamomum and Molecular Analysis of ACC Deaminase Gene

2015 ◽  
Vol 177 (1) ◽  
pp. 175-189 ◽  
Author(s):  
B. Jasim ◽  
Mathew Chacko Anish ◽  
Vellakudiyan Shimil ◽  
Mathew Jyothis ◽  
E. K. Radhakrishnan
Keyword(s):  
Plant Growth ◽  
Molecular Analysis ◽  
Acc Deaminase ◽  
Associated Bacteria ◽  
Elettaria Cardamomum ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Comparative Genomics Reveals Potential Mechanisms of Plant Beneficial Effects of a Novel Bamboo-Endophytic Bacterial Isolate Paraburkholderia sacchari Suichang626

2021 ◽  
Vol 12 ◽  
Author(s):  
Kai Wang ◽  
Ying Wu ◽  
Mengyuan Ye ◽  
Yifan Yang ◽  
Fred O. Asiegbu ◽  
...  
Keyword(s):  
Comparative Genomics ◽  
Plant Growth ◽  
Growth Promotion ◽  
Moso Bamboo ◽  
Associated Bacteria ◽  
Beneficial Effects ◽  
Genome Wide ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Genome Information

Plant-beneficial microbes have drawn wide attention due to their potential application as bio-control agents and bio-fertilizers. Moso bamboo, which is among the monocots with the highest growth rate, lives perennially with abundant microbes that may benefit annually growing crops. Genome information of moso bamboo associated bacteria remains underexplored. We isolated and identified a novel Paraburkholderia strain Suichang626 from moso bamboo roots. Growth promoting effects of Suichang626 on both moso bamboo and seedlings of the model dicot Arabidopsis thaliana were documented in laboratory conditions. To gain insight into the genetic basis of this growth promotion effect, we sequenced the genome of Suichang626. Evidenced by genome-wide phylogeny data, we propose that Suichang626 is a novel strain of Paraburkholderia sacchari. Gene homologs encoding biosynthesis of the plant growth-promoting chemicals, acetoin and 2,3-butanediol, were identified in the genome of Suichang626. Comparative genomics was further performed with plant-beneficial and plant/animal pathogenic species of Paraburkholderia and Burkholderia. Genes related to volatile organic compounds, nitrogen fixation, and auxin biosynthesis were discovered specifically in the plant growth-promoting species of both genera.

scholarly journals PLaBAse: A comprehensive web resource for analyzing the plant growth-promoting potential of plant-associated bacteria

2021 ◽  
Author(s):  
Sascha Patz ◽  
Anupam Gautam ◽  
Becker Matthias ◽  
Silke Ruppel ◽  
Pablo Rodriguez Palenzuela ◽  
...  
Keyword(s):  
Plant Growth ◽  
Marker Gene ◽  
Plant Production ◽  
Symbiotic Bacteria ◽  
Bacterial Strains ◽  
Bacterial Genomes ◽  
Associated Bacteria ◽  
Web Resource ◽  
Plant Growth Promoting ◽  
Growth Promoting

Plant-beneficial microorganisms are gaining importance for sustainable plant production and phytosanitary practices. Yet there is a lack of computational approaches targeting bacterial traits associated with plant growth-promotion (PGP), which hinders the in-silico identification, comparison, and selection of phytostimulatory bacterial strains. To address this problem, we have developed the new web resource PLaBAse (v1.01, http://plabase.informatik.uni-tuebingen.de/pb/plabase.php), which provides a number of services, including (i) a database for screening 5,565 plant-associated bacteria (PLaBA-db), (ii) a tool for predicting plant growth-promoting traits (PGPTs) of single bacterial genomes (PGPT-Pred), and (iii) a tool for the prediction of bacterial plant-association by marker gene identification (PIFAR-Pred). The latter was developed by Martĺnez-Garcĺa et al. and is now hosted at University of Tuebingen. The PGPT-Pred tool is based on our new PGPT ontology, a literature- and OMICs-curated, comprehensive, and hierarchical collection of ~6,900 PGPTs that are associated with 6,965,955 protein sequences. To study the distribution of the PGPTs across different environments, we applied it to 70,540 bacterial strains associated with (i) seven different environments (including plants), (iii) five different plant spheres (organs), and (iii) two bacteria-induced plant phenotypes. This analysis revealed that plant-symbiotic bacteria generally have a larger genome size and a higher count of PGPT-annotated protein encoding genes. Obviously, not all reported PGPTs are restricted to -or only enriched in- plant-associated and plant symbiotic bacteria. Some also occur in human- and animal-associated bacteria, perhaps due to the transmission of PGP bacteria (PGPBs) between environments, or because some functions are involved in adaption processes to various environments. Here we provide an easy-to-use approach for screening of PGPTs in bacterial genomes across various phyla and isolation sites, using PLaBA-db, and for standardized annotation, using PGPT-Pred. We believe that this resource will improve our understanding about the entire PGP processes and facilitate the prediction of PGPB as bio-inoculants and for biosafety strategies, so as to help to establish sustainable and targeted bacteria-incorporated plant production systems in the future.

Endophytic bacterial communities of field-grown potato plants and their plant-growth-promoting and antagonistic abilities

2004 ◽  
Vol 50 (4) ◽  
pp. 239-249 ◽  
Author(s):  
Angela Sessitsch ◽  
Birgit Reiter ◽  
Gabriele Berg
Keyword(s):  
16S Rrna ◽  
Plant Growth ◽  
Bacterial Pathogens ◽  
Antagonistic Activity ◽  
Streptomyces Scabies ◽  
Rrna Genes ◽  
Associated Bacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting

To study the effect of plant growth on potato-associated bacteria, the composition and properties of bacteria colonizing the endosphere of field-grown potato were analyzed by a multiphasic approach. The occurrence and diversity of potato-associated bacteria were monitored by a cultivation-independent approach, using terminal restriction fragment length polymorphism analysis of 16S rDNA. The patterns obtained revealed a high heterogeneity of community composition and suggested the existence of plant-specific communities. However, endophytic populations correlated to a certain extent with plant growth performance. Endophytes were also isolated from plants that grew well or grew poorly and were identified by partial sequencing of the 16S rRNA genes. A broad phylogenetic spectrum was found among isolates and differently growing plants hosted different bacterial populations. In an approach to investigate the plant-growth-promoting potential of potato-associated bacteria, a total of 35 bacteria were screened by dual testing for in vitro antagonism towards (i) the fungal pathogens Verticillium dahliae, Rhizoctonia solani, Sclerotinia sclerotiorum, and Phytophthora cactorum and (ii) the bacterial pathogens Erwinia carotovora, Streptomyces scabies, and Xanthomonas campestris. The proportion of isolates with antagonistic activity was highest against Streptomyces sp. (43%) followed by those against Xanthomonas sp. (29%). As all plants showed more or less severe disease symptoms of scab disease caused by Streptomyces scabies, we assume that the presence of the pathogen induced the colonization of antagonists. The antifungal activity of the isolates was generally low. The biotechnological potential of endophytic isolates assessed by their antagonistic activity and by in vitro production of enzymes, antibiotics, siderophores, and the plant growth hormone indole-1,3-acetic acid was generally high. Overall, seven endophytes were found to antagonize fungal as well as bacterial pathogens and showed a high production of active compounds and were therefore considered promising biological control agents.Key words: T-RFLP, 16S rRNA, siderophores, IAA, biocontrol.

scholarly journals Impact of soil salinity on the plant-growth – promoting and biological control abilities of root associated bacteria

2017 ◽  
Vol 24 (7) ◽  
pp. 1601-1608 ◽  
Author(s):  
Dilfuza Egamberdieva ◽  
Kakhramon Davranov ◽  
Stephan Wirth ◽  
Abeer Hashem ◽  
Elsayed Fathi Abd_Allah
Keyword(s):  
Biological Control ◽  
Plant Growth ◽  
Soil Salinity ◽  
Associated Bacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting
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