scholarly journals Bacillus velezensis: A Treasure House of Bioactive Compounds of Medicinal, Biocontrol and Environmental Importance

Forests ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1714
Author(s):  
Faizah N. Alenezi ◽  
Houda Ben Slama ◽  
Ali Chenari Bouket ◽  
Hafsa Cherif-Silini ◽  
Allaoua Silini ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Plant Growth ◽  
Secondary Metabolite ◽  
Host Plants ◽  
Plant Diseases ◽  
Fermented Foods ◽  
Bacillus Velezensis ◽  
Pan Genome ◽  
Life Styles ◽  
Promote Plant Growth

Bacillus velezensis gram-positive bacterium, is frequently isolated from diverse niches mainly soil, water, plant roots, and fermented foods. B. velezensis is ubiquitous, non-pathogenic and endospore forming. Being frequently isolated from diverse plant holobionts it is considered host adapted microorganism and recognized of high economic importance given its ability to promote plant growth under diverse biotic and abiotic stress conditions. Additionally, the species suppress many plant diseases, including bacterial, oomycete, and fungal diseases. It is also able after plant host root colonization to induce unique physiological situation of host plant called primed state. Primed host plants are able to respond more rapidly and/or effectively to biotic or abiotic stress. Moreover, B. velezenis have the ability to resist diverse environmental stresses and help host plants to cope with, including metal and xenobiotic stresses. Within species B. velezensis strains have unique abilities allowing them to adopt different life styles. Strain level abilities knowledge is warranted and could be inferred using the ever-expanding new genomes list available in genomes databases. Pangenome analysis and subsequent identification of core, accessory and unique genomes is actually of paramount importance to decipher species full metabolic capacities and fitness across diverse environmental conditions shaping its life style. Despite the crucial importance of the pan genome, its assessment among large number of strains remains sparse and systematic studies still needed. Extensive knowledge of the pan genome is needed to translate genome sequencing efforts into developing more efficient biocontrol agents and bio-fertilizers. In this study, a genome survey of B. velezensis allowed us to (a) highlight B. velezensis species boundaries and show that Bacillus suffers taxonomic imprecision that blurs the debate over species pangenome; (b) identify drivers of their successful acquisition of specific life styles and colonization of new niches; (c) describe strategies they use to promote plant growth and development; (d) reveal the unlocked strain specific orphan secondary metabolite gene clusters (biosynthetic clusters with corresponding metabolites unknown) that product identification is still awaiting to amend our knowledge of their putative role in suppression of pathogens and plant growth promotion, and (e) to describe a dynamic pangenome with a secondary metabolite rich accessory genome.

scholarly journals Actinomycetes, promising tools to control plant diseases and to promote plant growth

2005 ◽  
Vol 82 (3) ◽  
pp. 85-102 ◽  
Author(s):  
C.L. Doumbou ◽  
M.K. Hamby Salove ◽  
D.L. Crawford ◽  
C. Beaulieu
Keyword(s):  
Plant Growth ◽  
Plant Pathogens ◽  
Soil Microbial Biomass ◽  
Extracellular Enzymes ◽  
Control Plant ◽  
Plant Diseases ◽  
Soil Microbial ◽  
Plant Growth Promoting ◽  
Promote Plant Growth ◽  
Growth Promoting

Actinomycetes represent a high proportion of the soil microbial biomass and have the capacity to produce a wide variety of antibiotics and of extracellular enzymes. Several strains of actinomycetes have been found to protect plants against plant diseases. This review focuses on the potential of actinomycetes as (a) source of agroactive compounds, (b) plant growth promoting organisms, and (c) biocontrol tools of plant diseases. This review also addresses examples of biological control of fungal and bacterial plant pathogens by actinomycetes species which have already reached the market or are likely to be exploited commercially within the next few years.

scholarly journals Genome Mining of Three Plant Growth-Promoting Bacillus Species from Maize Rhizosphere

2021 ◽  
Author(s):  
Oluwaseyi Samuel Olanrewaju ◽  
Modupe Stella Ayilara ◽  
Ayansina Segun Ayangbenro ◽  
Olubukola Oluranti Babalola
Keyword(s):  
Bacillus Subtilis ◽  
Plant Growth ◽  
Bacillus Species ◽  
Bacillus Velezensis ◽  
Growth Promoters ◽  
Genetic Elements ◽  
Pan Genome ◽  
Genetic Components ◽  
Plant Growth Promoting ◽  
Growth Promoting

AbstractBacillus species genomes are rich in plant growth-promoting genetic elements. Bacillus subtilis and Bacillus velezensis are important plant growth promoters; hence, to further improve their abilities, the genetic elements responsible for these traits were characterized and reported. Genetic elements reported include those of auxin, nitrogen fixation, siderophore production, iron acquisition, volatile organic compounds, and antibiotics. Furthermore, the presence of phages and antibiotic-resistant genes in the genomes are reported. Pan-genome analysis was conducted using ten Bacillus species. From the analysis, pan-genome of Bacillus subtilis and Bacillus velezensis are still open. Ultimately, this study brings an insight into the genetic components of the plant growth-promoting abilities of these strains and shows their potential biotechnological applications in agriculture and other relevant sectors.

scholarly journals Evaluation of Arbuscular Mycorrhizal Fungi Capacity to Alleviate Abiotic Stress of Olive (Olea europaeaL.) Plants at Different Transplant Conditions

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
María Josefina Bompadre ◽  
Mariana Pérgola ◽  
Laura Fernández Bidondo ◽  
Roxana Paula Colombo ◽  
Vanesa Analía Silvani ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Plant Growth ◽  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Host Plants ◽  
Arbuscular Mycorrhizal ◽  
Symbiotic Association ◽  
Oxygen Species ◽  
Adverse Conditions ◽  
Adaptive Mechanisms

The capacity of roots to sense soil physicochemical parameters plays an essential role in maintaining plant nutritional and developmental functions under abiotic stress. These conditions generate reactive oxygen species (ROS) in plant tissues causing oxidation of proteins and lipids among others. Some plants have developed adaptive mechanisms to counteract such adverse conditions such as symbiotic association with arbuscular mycorrhizal fungi (AMF). AMF enhance plant growth and improve transplant survival by protecting host plants against environmental stresses. The aim of this study was to evaluate the alleviation of transplanting stress by two strains ofRhizophagus irregularis(GC2 and GA5) in olive. Our results show that olive plants have an additional energetic expense in growth due to an adaptative response to the growing stage and to the mycorrhizal colonization at the first transplant. However, at the second transplant the coinoculation improves olive plant growth and protects against oxidative stress followed by the GA5-inoculation. In conclusion, a combination of two AMF strains at the beginning of olive propagation produces vigorous plants successfully protected in field cultivation even with an additional cost at the beginning of growth.

scholarly journals Can metal-tolerant endophytic biocontrol agents promote plant-growth under metal stress?

2020 ◽  
Vol 63 (2) ◽  
pp. 169-179
Author(s):  
Carrie Siew Fang Sim ◽  
Yuen Lin Cheow ◽  
Si Ling Ng ◽  
Adeline Su Yien Ting
Keyword(s):  
Plant Growth ◽  
Host Plants ◽  
Indole Acetic Acid ◽  
Metal Tolerance ◽  
Promote Plant Growth ◽  
Growth Promoting ◽  
Phomopsis Asparagi ◽  
Lower Production

Five metal-tolerant endophytic isolates (Bipolaris sp. LF7, Diaporthe miriciae LF9, Trichoderma asperellum LF11, Phomopsis asparagi LF15, Saccharicola bicolor LF22), with known metal-tolerance attributes and biocontrol activities against Ganoderma boninense, were tested for growth-promoting activities independent of (in vitro) and associated with plants (height, weight, root mass and stem circumference) (in vivo). Results revealed that metal-tolerant endophytes did not significantly render benefit to host plants as plant growth was compromised by the presence of metals. Lower production of indole-acetic acid (0.74-21.77 μg mL-1), siderophores (8.82-90.26%), and deaminase activities of 1-aminocyclopropane carboxylic acid (3.00-69.2 μmol mg protein-1 hr-1) were observed.

scholarly journals Genome Sequence of the Polymyxin-Producing Plant-Probiotic Rhizobacterium Paenibacillus polymyxa E681

2010 ◽  
Vol 192 (22) ◽  
pp. 6103-6104 ◽  
Author(s):  
Jihyun F. Kim ◽  
Haeyoung Jeong ◽  
Soo-Young Park ◽  
Seong-Bin Kim ◽  
Yon Kyoung Park ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Plant Growth ◽  
Genome Sequence ◽  
Complete Genome Sequence ◽  
Hydrolytic Enzymes ◽  
Paenibacillus Polymyxa ◽  
Plant Diseases ◽  
Positive Bacterium ◽  
Agricultural Applications ◽  
Promote Plant Growth

ABSTRACT Paenibacillus polymyxa E681, a spore-forming, low-G+C, Gram-positive bacterium isolated from the rhizosphere of winter barley grown in South Korea, has great potential for agricultural applications due to its ability to promote plant growth and suppress plant diseases. Here we present the complete genome sequence of P. polymyxa E681. Its 5.4-Mb genome encodes functions specialized to the plant-associated lifestyle and characteristics that are beneficial to plants, such as the production of a plant growth hormone, antibiotics, and hydrolytic enzymes.

scholarly journals Complete Genome Sequence of Bacillus velezensis CBMB205, a Phosphate-Solubilizing Bacterium Isolated from the Rhizoplane of Rice in the Republic of Korea

2016 ◽  
Vol 4 (4) ◽  
Author(s):  
Kyeong Hwangbo ◽  
Yurry Um ◽  
Ki Yoon Kim ◽  
Munusamy Madhaiyan ◽  
Tong Min Sa ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Plant Growth ◽  
Genome Sequence ◽  
Complete Genome Sequence ◽  
Complete Genome ◽  
Bacillus Velezensis ◽  
Protein Coding ◽  
Promote Plant Growth ◽  
The Republic ◽  
Phosphate Solubilizing

Bacillus velezensis CBMB205 (= KACC 13105 T = NCCB 100236 T ) was isolated from the rhizoplane of rice ( Oryza sativa L. cv. O-dae). According to previous studies, this bacterium has several genes that can promote plant growth, such as the phosphorus-solubilizing protein-coding gene. Here, we present the first complete genome of B. velezensis CBMB205.

scholarly journals Genome Sequence of the Fungus Trichoderma asperellum SM-12F1 revealing candidate Functions of Growth Promotion, Biocontrol, and Bioremediation

2021 ◽  
Author(s):  
Lijuan Li ◽  
Xibai Zeng ◽  
Jie-Yin Chen ◽  
Jian Tian ◽  
Jinqun Huang ◽  
...  
Keyword(s):  
Plant Growth ◽  
Genomic Sequence ◽  
Growth Promotion ◽  
Plant Diseases ◽  
Trichoderma Spp ◽  
Genome Data ◽  
Biocontrol Activity ◽  
Promote Plant Growth ◽  
Genomic Basis ◽  
High Quality Genome

Trichoderma spp. are versatile probiotic fungi that are known to promote plant growth and disease resistance under biotic stress, abiotic stress, or both. They are often used to prevent plant diseases caused by pathogens and act as bio-fertilizers and are used in mycoremediation. In our previous study, T. asperellum strain SM-12F1 was isolated from soils contaminated with arsenic (As), adjacent to a realgar mine. SM-12F1 promoted plant growth and was useful for biocontrol and bioremediation. However, the genomic sequence of this strain was not characterized. This study aimed to generate high-quality genome resources for T. asperellum SM-12F1, and to determine the genomic basis of mechanisms behind plant growth promotion, biocontrol, and bioremediation of As in soil. Genome data of this fungus will provide perspectives on the molecular basis underlying biocontrol activity and mycoremediation.

scholarly journals Characterization and Diversity of plant growth promoting Endophytic and Rhizosphere Bacteria isolated from theRhizosphere and tissues of Pepper and their effect on plant growth promotion and disease suppression of Phytophthora capsici

2021 ◽  
Author(s):  
Mesele Admassie ◽  
Yitbark Wold-Hawariat ◽  
Tesefaye Alemu
Keyword(s):  
Acetic Acid ◽  
Plant Growth ◽  
Endophytic Bacteria ◽  
Phytophthora Capsici ◽  
Plant Diseases ◽  
Plant Growth Promoting Bacteria ◽  
Plant Growth Promoting ◽  
Promote Plant Growth ◽  
Growth Promoting ◽  
Pepper Plants

Abstract Plant growth promoting rhizo and endophytic bacteria were isolated from different parts of pepper from south eastern Ethiopia. Plant growth promoting bacteria (PGP) are those that may be used to promote plant growth and suppress plant diseases. The objectives of this study were to identify and characterize PGPB indigenous to pepper rhizosphere and endophyte bacteria in Ethiopia, and to determine their capacity to suppress Phytophthora capsici in pepper. From a total of 60 isolates, 20 were selected based on their in vitro antagonism activity of phytopathogens and plant growth promoting traits. From the total 60 strains representing, 38 rhizosphere, and 22 endophytic bacteria were identified based on biochemical assays of semi-automated Vitec 2 compact and ten potential bacteria further identified by molecular methods. Results revealed that only one isolate of rhizosphere and three endophytic bacteria showed more than 50% suppression of test pathogens. The isolates were evaluated for their ability to solubilize phosphate, as well as for ammonia, indole acetic acid, hydrogen cyanide, and biofilm production. The selected isolates produced (0.2–93 µg mL− 1) of indole-3-acetic acid, without supplemented with tryptophan, while supplemented with tryptophan it produces (11.23–159 µg mL− 1). The activities of plant growth-promoting were assessed by measuring their effect on the number of lateral roots, root and shoot length of Arabidopsis plants, and germination percentage of pepper plants. Pepper plants grown from seeds that were treated with these PGPB strains showed significantly higher levels of germination, seedling vigor, and growth, compared to non-treated control plants. Since these PGPB inoculants showed multiple characters useful to the host plants, they may be used as an alternative in the production of new, safe, and effective seed treatments as bio-fungicides. Generally, this work exhibits the potential of bacterial isolates to control Phytophthora infection and promote plant growth.

scholarly journals Draft Genome Sequence of Plant Growth-Promoting Bacillus velezensis BS89

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Vladimir K. Chebotar ◽  
Gerben P. Voshol ◽  
Natalia V. Malfanova ◽  
Elena P. Chizhevskaya ◽  
Alexander N. Zaplatkin ◽  
...  
Keyword(s):  
Plant Growth ◽  
Winter Wheat ◽  
Complete Genome ◽  
Molecular Mechanisms ◽  
Draft Genome ◽  
Bacillus Velezensis ◽  
Content Type ◽  
Plant Growth Promoting ◽  
Promote Plant Growth ◽  
Growth Promoting

ABSTRACT The plant growth-promoting bacterium Bacillus velezensis BS89 was isolated from the rhizosphere of winter wheat. Strain BS89 has the ability to promote plant growth and produce a mix of auxins and vitamins. Here, we sequenced the complete genome of this strain to understand the molecular mechanisms underlying its beneficial activities.

A Study on the Farmers’ Awareness and Acceptance of Biofertilizers in Kottayam District

GIS Business ◽  
2019 ◽  
Vol 14 (6) ◽  
pp. 425-431
Author(s):  
Subin Thomas ◽  
Dr. M. Nandhini
Keyword(s):  
Organic Matter ◽  
Nitrogen Fixation ◽  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Nutrient Cycle ◽  
Plant Growth Promoting ◽  
Promote Plant Growth ◽  
Growth Promoting ◽  
Structured Questionnaire ◽  
Area Data

Biofertilizers are fertilizers containing microorganisms that promote plant growth by improving the supply of nutrients to the host plant. The supply of nutrients is improved naturally by nitrogen fixation and solubilizing phosphorus. The living microorganisms in biofertilizers help in building organic matter in the soil and restoring the natural nutrient cycle. Biofertilizers can be grouped into Nitrogen-fixing biofertilizers, Phosphorous-solubilizing biofertilizers, Phosphorous-mobilizing biofertilizers, Biofertilizers for micro nutrients and Plant growth promoting rhizobacteria. This study conducted in Kottayam district was intended to identify the awareness and acceptance of biofertilizers among the farmers of the area. Data have been collected from 120 farmers by direct interviews with structured questionnaire.

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