Beneficial Effects of Weed Endophytic Bacteria: Diversity and Potentials of Their Usage in Sustainable Agriculture

2019 ◽  
pp. 349-364
Author(s):  
Kaniz Fatema ◽  
Nur Uddin Mahmud ◽  
M. Tofazzal Islam
Keyword(s):  
Sustainable Agriculture ◽  
Endophytic Bacteria ◽  
Beneficial Effects ◽  
Bacteria Diversity

scholarly journals Scientometric analysis of Colombian research on bio-inoculants for agricultural production

2016 ◽  
Vol 21 (1) ◽  
pp. 63 ◽  
Author(s):  
Diana Corina Zambrano-Moreno ◽  
Laura Avellaneda-Franco ◽  
Gregorio Zambrano ◽  
Ruth Rebeca Bonilla-Buitrago
Keyword(s):  
Sustainable Agriculture ◽  
Agricultural Production ◽  
Endophytic Bacteria ◽  
Plant Growth Promoting Rhizobacteria ◽  
Knowledge Generation ◽  
Scientometric Analysis ◽  
Beneficial Effects ◽  
Leading Role ◽  
Plant Growth Promoting ◽  
Chemical Inputs

The excessive use of synthetic chemical inputs in agricultural production has led to the disruption of biogeochemical cycles. One of the alternatives that arose within the systems of sustainable agriculture was the partial or total replacement of chemicals by biological substances. The analysis of relevant scientific literature has become a tool for assessing the quality of knowledge generation and its impact on the environment. A scientometric analysis was conducted of Colombian research on bio-inoculants from 2009 through 2014 in journals added to the Web of SciencesTM in order to identify the characteristics of the main target crops, the microorganisms used, and the beneficial effects on agriculture. In this work, 34 articles were identified: 24 (71%) were research on bio-fertilizer development and 10 (29%) on bio-pesticides. Articles mainly focused on the study of Gram-negative bacilli affecting the area (77%), while others focused on issues and topics surrounding vegetables (30%).The analysis of co-occurrence of keywords identified: i) several genera of microorganisms (e.g. Azotobacter Bradyrhizobium) and sustainable agriculture as issues that have a leading role in this scientific field, ii) plant growth promoting rhizobacteria (PGPR) as an emerging issue, iii) biological nitrogen fixation (BNF) as a subject which has risen in a complementary manner and iv) endophytic bacteria and biodiversity as issues in growth. This study showed that research in Colombia could be targeted on issues such as endophytic bacteria, diversity and productivity.

scholarly journals Glimpse into the Genomes of Rice Endophytic Bacteria: Diversity and Distribution of Firmicutes

2017 ◽  
Vol 7 ◽  
Author(s):  
Vasvi Chaudhry ◽  
Shikha Sharma ◽  
Kanika Bansal ◽  
Prabhu B. Patil
Keyword(s):  
Endophytic Bacteria ◽  
Bacteria Diversity

Growth enhancement of medicinal plant Withania somnifera using phosphate solubilizing endophytic bacteria Pseudomonas sp. as bioinoculant

2016 ◽  
Vol 2 (1-2) ◽  
Author(s):  
Naveen Kumar Arora ◽  
Rachna B. Singh
Keyword(s):  
Medicinal Plant ◽  
Endophytic Bacteria ◽  
Withania Somnifera ◽  
16S Rrna Gene Sequencing ◽  
Nutrient Level ◽  
Rrna Gene ◽  
Growth Enhancement ◽  
Pseudomonas Sp ◽  
Beneficial Effects ◽  
Medicinal Value

Withania somnifera, commonly known as ashwagandha, is a wildly growing highly valuable medicinal plant, found throughout India. Ashwagandha has high medicinal value due to its antioxidant, antitumor, anti-inflammatory, immuno-modulatory, anti-ageing and rejuvenating properties. Since use of synthetic agrochemicals in the cultivation of medicinal plants is highly restricted due to their harmful effects on human health and environment, present study was aimed to explore the role of endophytic bacteria in enhancing the nutrient level in soil and growth of ashwagandha. In this study, growth promoting potential of endophytic bacterial strain PSE-1 was explored which was isolated from the roots of W. somnifera and identified as Pseudomonas sp. on the basis of 16s rRNA gene sequencing. Results obtained from the study suggest that endophytic bacteria Pseudomonas sp. plays important role in improving the nutrient level in soil and displayed beneficial effects on plant growth.

scholarly journals Plant growth promoting rhizobacteria: Beneficial effects for healthy and sustainable agriculture

2016 ◽  
Vol 15 (27) ◽  
pp. 1452-1463 ◽  
Author(s):  
Agossou Noumavo Pac ocirc me ◽  
Adouk egrave Agbodjato Nad egrave ge ◽  
Baba Moussa Farid ◽  
Adjanohoun Adolphe ◽  
Baba Moussa Lamine
Keyword(s):  
Plant Growth ◽  
Sustainable Agriculture ◽  
Plant Growth Promoting Rhizobacteria ◽  
Beneficial Effects ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals ISOLASI MIKROBA ENDOFITIK DARI TANAMAN OBAT SAMBUNG NYAWA Gynura procumbens) DAN ANALISIS POTENSINYA SEBAGAI ANTIMIKROBA

2007 ◽  
Vol 13 (1) ◽  
pp. 85-90 ◽  
Author(s):  
Rumella Simarmata ◽  
Sylvia Lekatompessy ◽  
Harmastini Sukiman
Keyword(s):  
Antimicrobial Activity ◽  
Endophytic Fungi ◽  
Endophytic Bacteria ◽  
Antimicrobial Agents ◽  
Inhibition Zone ◽  
Pseudomonas Sp ◽  
E Coli ◽  
Beneficial Effects ◽  
Medical Plants ◽  
Promising Source

Sambung nyawa (Gynura procumbens) has many beneficial effects to human health, such as decreasing blood pressure, maintaining blood sugar level (hypoglycaemic), decreasing cholesterol, a remedy for kidney trouble, antibacterial and lessen the inflamation (antiinflamation). This research was undertaken to discover the potency of endophytic microbes from sambung nyawa as antimicrobial agents. The purpose of this research was to screen the endophytic bacteria and the endophytic fungi having antimicrobial activity, which were isolated from stems, leaves, roots and fruits of medical plants, sambung nyawa. The antimicrobial activity was determined by measuring the growth inhibition of pathogenic microbes i.e Candida albicans, Escherichia coli, Pseudomonas sp. and Bacillus subtilis. A total of 38 isolates of bacteria and 15 isolates of fungi were obtained from sambung nyawa. Analysis demonstrated that, 45 percent isolates of bacteria and 20 percent isolates of fungi exhibited inhibitory activity. Antimicrobial activity was found in 21 percent of the isolates that inhibited the growth of C. albicans, E. coli, Pseudomonas sp., and B. subtilis, whereas 24 percent of isolates had activity only against B. subtilis. Isolate of endophytic bacteria USN 1.1 and USN 2.3 showed the most significant of inhibition zone. The Inhibition zone of the isolate USN 1.1 to C. albicans, E. coli, Pseudomonas sp, and B. subtilis were 2.318 cm2, 0.969 cm2, 0.796 cm2, and 0.381 cm2, respectively. The Inhibition zone of the isolate USN 2.3 to C. albicans, E. coli, Pseudomonas sp., and B. subtilis were 3.01 cm2, 0.519 cm2, 0.588 cm2 and 0.83 cm2, respectively. These results indicated that endophytic bacteria and endophytic fungi could be a promising source for antimicrobial agents.

Bacterial endophytes in agricultural crops

1997 ◽  
Vol 43 (10) ◽  
pp. 895-914 ◽  
Author(s):  
J. Hallmann ◽  
A. Quadt-Hallmann ◽  
W. F. Mahaffee ◽  
J. W. Kloepper
Keyword(s):  
Endophytic Bacteria ◽  
Plant Pathogens ◽  
Growth Promotion ◽  
Abiotic Factors ◽  
Hydrolytic Enzymes ◽  
Dynamic Structure ◽  
Plant Tissues ◽  
Beneficial Effects ◽  
Weakly Virulent ◽  
Planting Materials

Endophytic bacteria are ubiquitous in most plant species, residing latently or actively colonizing plant tissues locally as well as systemically. Several definitions have been proposed for endophytic bacteria; in this review endophytes will be defined as those bacteria that can be isolated from surface-disinfested plant tissue or extracted from within the plant, and that do not visibly harm the plant. While this definition does not include nonextractable endophytic bacteria, it is a practical definition based on experimental limitations and is inclusive of bacterial symbionts, as well as internal plant-colonizing nonpathogenic bacteria with no known beneficial or detrimental effects on colonized plants. Historically, endophytic bacteria have been thought to be weakly virulent plant pathogens but have recently been discovered to have several beneficial effects on host plants, such as plant growth promotion and increased resistance against plant pathogens and parasites. In general, endophytic bacteria originate from the epiphytic bacterial communities of the rhizosphere and phylloplane, as well as from endophyte-infested seeds or planting materials. Besides gaining entrance to plants through natural openings or wounds, endophytic bacteria appear to actively penetrate plant tissues using hydrolytic enzymes like cellulase and pectinase. Since these enzymes are also produced by pathogens, more knowledge on their regulation and expression is needed to distinguish endophytic bacteria from plant pathogens. In general, endophytic bacteria occur at lower population densities than pathogens, and at least some of them do not induce a hypersensitive response in the plant, indicating that they are not recognized by the plant as pathogens. Evolutionarily, endophytes appear to be intermediate between saprophytic bacteria and plant pathogens, but it can only be speculated as to whether they are saprophytes evolving toward pathogens, or are more highly evolved than plant pathogens and conserve protective shelter and nutrient supplies by not killing their host. Overall, the endophytic microfloral community is of dynamic structure and is influenced by biotic and abiotic factors, with the plant itself constituting one of the major influencing factors. Since endophytic bacteria rely on the nutritional supply offered by the plant, any parameter affecting the nutritional status of the plant could consequently affect the endophytic community. This review summarizes part of the work being done on endophytic bacteria, including their methodology, colonization, and establishment in the host plant, as well as their role in plant–microbe interactions. In addition, speculative conclusions are raised on some points to stimulate thought and research on endophytic bacteria.Key words: endophytic bacteria, methods, localization, diversity, biological control.

scholarly journals Halophytic bacterial endophytome: a potential source of beneficial microbes for a sustainable agriculture

2020 ◽  
Author(s):  
Christos A. Christakis ◽  
Georgia Daskalogiannis ◽  
Anastasia Chatzakis ◽  
Emmanouil A. Markakis ◽  
Angeliki Sagia ◽  
...  
Keyword(s):  
Sustainable Agriculture ◽  
Endophytic Bacteria ◽  
Pathogenic Fungus ◽  
Bacterial Species ◽  
Species Abundance ◽  
Global Strategy ◽  
In Planta ◽  
Promoting Effect ◽  
Cakile Maritima

AbstractHalophytes have evolved several strategies to survive in saline environments; however, additional support from their associated microbiota could help combat adverse conditions. Endophytic communities of halophytes may be different than those in other plants because salinity acts as an environmental filter. At the same time, they may contribute to the host’s adaptation to adverse environmental conditions and can improve host tolerance against various biotic and abiotic stresses, which may be of importance in modern and sustainable agriculture.In this study the culturable endophytic bacteria of three halophytic species Cakile maritima, Matthiola tricuspidata and Crithmum maritimum were isolated and identified. Endophytic bacteria were isolated from roots and leaves of the sampled plants. Significant differences were observed in bacterial species abundance among different plant species and tissue from which the isolates were obtained. In total, 115 strains were identified by analysis of complete 16S rDNA sequences, while the majority of these isolates were derived from the root samples.The strains were evaluated for their ability to: 1) grow in-vitro in high levels of NaCl; 2) inhibit the growth of the economically important plant pathogenic fungus Verticillium dahliae in vitro and in planta, the human pathogenic fungus Aspergillus fumigatus in vitro, as well as, the economically important plant bacterial pathogens Ralstonia solanacearum and Clavibacter michiganensis in vitro; 3) provide salt tolerance in planta; 4) provide growth promoting effect in planta.Additionally, the genomes of twelve selected isolates, exhibiting interesting features, were sequenced and analysed. Three novel bacterial species were identified that belong to the genus Pseudomonas (two strains) and Arthrobacter (one strain).The outcome of our study is the proof-of-concept that the crop wild relatives (CWR) halophytic microbiome could potentially serve as a source of beneficial microorganisms that could be used (as unique species or as artificial communities) as Bio-Inoculants, for the enhancement of plant growth and stress tolerance in crops, including the high-salinity stress.This is very important in the era of ecosystem degradation and climate change, where the maximizing microbial functions in agroecosystems could be a prerequisite for the future of global sustainable agriculture. Globally, there is a strong need for the identification and bio-banking of novel beneficial endophytic microbes with as many desirable characters, for the development of a new environmentally friendly global strategy in food production that will be based in the sustainable agriculture with low chemical inputs and a low environmental impact.

Endophytic bacteria: Role in sustainable agriculture

2020 ◽  
pp. 37-60
Author(s):  
Mahendra Prasad ◽  
R. Srinivasan ◽  
Manoj Chaudhary ◽  
Sonu Kumar Mahawer ◽  
Lokesh Kumar Jat
Keyword(s):  
Sustainable Agriculture ◽  
Endophytic Bacteria

Advances in understanding modes of action of microbial bioprotectants

2021 ◽  
pp. 3-32
Author(s):  
Gabriele Berg ◽  
◽  
Peter Kusstatscher ◽  
Franz Stocker ◽  
Ahmed Abdelfattah ◽  
...  
Keyword(s):  
Sustainable Agriculture ◽  
Growth Performance ◽  
Current Knowledge ◽  
Environmentally Friendly ◽  
Global Scale ◽  
Beneficial Effects ◽  
Modes Of Action ◽  
Microbiome Research ◽  
Microbe Interactions ◽  
Plant Microbiome

Plant-associated microorganisms are involved in important functions related to growth, performance and health of their hosts. Understanding their modes of action is important for the development and application of microbial bioprotectants and biostimulants. Recent studies have revealed manifold plant-microbe as well as pathogen-microbe interactions, which form the basis of understanding beneficial effects of plant-associated microorganisms. Microbiome research has contributed to our understanding of the modes of action of various plant-associated microorganisms. This chapter summarizes current knowledge about beneficial plant-microbe interactions, discusses recent insights into the functioning of the plant microbiome and beneficial plant-microbe networks. It shows that the use of microorganisms and the exploitation of beneficial plant–microbe interactions offer promising and environmentally-friendly strategies to achieve sustainable agriculture on a global scale.

scholarly journals Application and Mechanisms of Plant Growth Promoting Fungi (PGPF) for Phytostimulation

2020 ◽  
Author(s):  
Md. Motaher Hossain ◽  
Farjana Sultana
Keyword(s):  
Plant Growth ◽  
Sustainable Agriculture ◽  
Crop Production ◽  
Plant Pathogens ◽  
Crop Yields ◽  
Intrinsic Factor ◽  
Beneficial Effects ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Increasing Demand

Plant growth-promoting fungi (PGPF) constitute diverse genera of nonpathogenic fungi that provide a variety of benefits to their host plants. PGPF show an effective role in sustainable agriculture. Meeting increasing demand for crop production without damage to the environment is the biggest challenge nowadays. The use of PGPF has been recognized as an environmentally friendly way of increasing crop production. These fungi have proven to increase crop yields by improving germination, seedling vigor, plant growth, root morphogenesis, photosynthesis, and flowering through either a direct or indirect mechanism. The mechanisms of PGPF involve solubilizing and mineralizing nutrients for easy uptake by plants, regulating hormonal balance, producing volatile organic compounds and microbial enzyme, suppressing plant pathogens and ameliorating abiotic stresses. Successful colonization is an intrinsic factor for most PGPF to exert their beneficial effects on plants. A certain level of specificity exists in the interactions between plant species and PGPF for root colonization and growth promoting effects. There is a gap between the number of reported efficacious PGPF and the number of PGPF as biofertilizer. Efforts should be strengthened to improve the efficacy and commercialization of PGPF. Hence, this chapter summarizes valuable information regarding the application and mechanisms of PGPF in sustainable agriculture.

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