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https://www.readbyqxmd.com/read/28986676/mechanisms-of-action-of-plant-growth-promoting-bacteria
#1
REVIEW
Oluwaseyi Samuel Olanrewaju, Bernard R Glick, Olubukola Oluranti Babalola
The idea of eliminating the use of fertilizers which are sometimes environmentally unsafe is slowly becoming a reality because of the emergence of microorganisms that can serve the same purpose or even do better. Depletion of soil nutrients through leaching into the waterways and causing contamination are some of the negative effects of these chemical fertilizers that prompted the need for suitable alternatives. This brings us to the idea of using microbes that can be developed for use as biological fertilizers (biofertilizers)...
October 6, 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28934107/cultivar-and-metal-specific-effects-of-endophytic-bacteria-in-helianthus-tuberosus-exposed-to-cd-and-zn
#2
Blanca Montalbán, Sofie Thijs, Mª Carmen Lobo, Nele Weyens, Marcel Ameloot, Jaco Vangronsveld, Araceli Pérez-Sanz
Plant growth promoting endophytic bacteria (PGPB) isolated from Brassica napus were inoculated in two cultivars of Helianthus tuberosus (VR and D19) growing on sand supplemented with 0.1 mM Cd or 1 mM Zn. Plant growth, concentrations of metals and thiobarbituric acid (TBA) reactive compounds were determined. Colonization of roots of H. tuberosus D19 by Pseudomonas sp. 262 was evaluated using confocal laser scanning microscopy. Pseudomonas sp. 228, Serratia sp. 246 and Pseudomonas sp. 262 significantly enhanced growth of H...
September 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28833158/plant-growth-promoting-bacteria-elevate-the-nutritional-and-functional-properties-of-black-cumin-and-flaxseed-fixed-oil
#3
Snežana Dimitrijević, Marija Pavlović, Svetolik Maksimovic, Mihajlo Ristić, Vladimir Filipović, Dušan Antonović, Suzana Dimitrijević-Branković
BACKGROUND: In order to study the influence of plant growth promoting bacteria (PGPB) belonging to the Streptomyces sp., Paenibacillus sp. and Hymenibacter sp, on fixed oil content of Flaxseed as well as Black cumin, a two years' field experiments were conducted. The PGPB was applied during seedtime of plants. The extraction of oil from seeds was performed with a CO2 supercritical extraction. RESULTS: The addition of PGPB significantly increase the content of C18:1 (from 16...
August 21, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28818809/differential-oxidative-and-antioxidative-response-of-duckweed-lemna-minor-toward-plant-growth-promoting-inhibiting-bacteria
#4
Hidehiro Ishizawa, Masashi Kuroda, Masaaki Morikawa, Michihiko Ike
Bacteria colonizing the plant rhizosphere are believed to positively or negatively affect the host plant productivity. This feature has inspired researchers to engineer such interactions to enhance crop production. However, it remains to be elucidated whether rhizobacteria influences plant oxidative stress vis-a-vis other environmental stressors, and whether such influence is associated with their growth promoting/inhibiting ability. In this study, two plant growth-promoting bacteria (PGPB) and two plant growth-inhibiting bacteria (PGIB) were separately inoculated into axenic duckweed (Lemna minor) culture under laboratory conditions for 4 and 8 days in order to investigate their effects on plant oxidative stress and antioxidant activities...
August 9, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28808815/physiological-responses-and-antioxidant-enzyme-changes-in-sulla-coronaria-inoculated-by-cadmium-resistant-bacteria
#5
Manel Chiboub, Salwa Harzalli Jebara, Omar Saadani, Imen Challougui Fatnassi, Souhir Abdelkerim, Moez Jebara
Plant growth promoting bacteria (PGPB) may help to reduce the toxicity of heavy metals on plants growing in polluted soils. In this work, Sulla coronaria inoculated with four Cd resistant bacteria (two Pseudomonas spp. and two Rhizobium sullae) were cultivated in hydroponic conditions treated by Cd; long time treatment 50 µM CdCl2 for 30 days and short time treatment; 100 µM CdCl2 for 7 days. Results showed that inoculation with Cd resistant PGPB enhanced plant biomass, thus shoot and root dry weights of control plants were enhanced by 148 and 35% respectively after 7 days...
August 14, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28780591/revealing-strategies-of-quorum-sensing-in-azospirillum-brasilense-strains-ab-v5-and-ab-v6
#6
Josiane Fukami, Julia Laura Fernandes Abrantes, Pablo Del Cerro, Marco Antonio Nogueira, Francisco Javier Ollero, Manuel Megías, Mariangela Hungria
Azospirillum brasilense is an important plant-growth promoting bacterium (PGPB) that requires several critical steps for root colonization, including biofilm and exopolysaccharide (EPS) synthesis and cell motility. In several bacteria these mechanisms are mediated by quorum sensing (QS) systems that regulate the expression of specific genes mediated by the autoinducers N-acyl-homoserine lactones (AHLs). We investigated QS mechanisms in strains Ab-V5 and Ab-V6 of A. brasilense, which are broadly used in commercial inoculants in Brazil...
August 5, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28760324/the-role-of-plant-growth-promoting-bacteria-in-metal-phytoremediation
#7
Zhaoyu Kong, Bernard R Glick
Phytoremediation is a promising technology that uses plants and their associated microbes to clean up contaminants from the environment. In recent years, phytoremediation assisted by plant growth-promoting bacteria (PGPB) has been highly touted for cleaning up toxic metals from soil. PGPB include rhizospheric bacteria, endophytic bacteria and the bacteria that facilitate phytoremediation by other means. This review provides information about the traits and mechanisms possessed by PGPB that improve plant metal tolerance and growth, and illustrate mechanisms responsible for plant metal accumulation/translocation in plants...
2017: Advances in Microbial Physiology
https://www.readbyqxmd.com/read/28751401/genome-sequence-of-pantoea-sp-strain-1-19-isolated-from-rice-rhizosphere-with-the-capacity-to-promote-growth-of-legumes-and-nonlegumes
#8
Esaú Megías, Fábio Bueno Reis Junior, Renan Augusto Ribeiro, Manuel Megías, Francisco Javier Ollero, Mariangela Hungria
Pantoea sp. 1.19, a plant growth-promoting bacterium (PGPB), was isolated from the rhizosphere of rice plants in Spain. Its genome, estimated at 3,771,065 bp, encodes 3,535 coding sequences (CDSs), carrying genes for synthesis of auxins, homoserine lactones, enzymes, siderophores, and quorum sensing. Several CDSs emphasize its biotechnological potential as an agriculture inoculant.
July 27, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28730550/disease-management-of-tomato-through-pgpb-current-trends-and-future-perspective
#9
REVIEW
Vipin Kumar Singh, Amit Kishore Singh, Ajay Kumar
Tomato is the world's second most cultivated vegetable. During cultivation or post-harvest storage, it is susceptible to more than 200 diseases caused by an array of pathogenic fungi, nematodes, bacteria, and viruses. Although wide range of chemical pesticides are currently available to manage plant diseases, continuous application of pesticides not only affect the nutritional contents of tomato but also the texture or productivity of soil. In this context, plant growth promoting bacteria (PGPB) are one of the nature friendly, safe, and effective alternatives for the management of diseases and pathogens of tomato...
August 2017: 3 Biotech
https://www.readbyqxmd.com/read/28586422/tomato-ethylene-sensitivity-determines-interaction-with-plant-growth-promoting-bacteria
#10
Pablo Ibort, Sonia Molina, Rafael Núñez, Ángel María Zamarreño, José María García-Mina, Juan Manuel Ruiz-Lozano, Maria Del Carmen Orozco-Mosqueda, Bernard R Glick, Ricardo Aroca
Background and Aims: Plant growth-promoting bacteria (PGPB) are soil micro-organisms able to interact with plants and stimulate their growth, positively affecting plant physiology and development. Although ethylene plays a key role in plant growth, little is known about the involvement of ethylene sensitivity in bacterial inoculation effects on plant physiology. Thus, the present study was pursued to establish whether ethylene perception is critical for plant-bacteria interaction and growth induction by two different PGPB strains, and to assess the physiological effects of these strains in juvenile and mature tomato ( Solanum lycopersicum ) plants...
July 1, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28581636/influence-of-endophytic-root-bacteria-on-the-growth-cadmium-tolerance-and-uptake-of-switchgrass-panicum-virgatum-l
#11
Samreen Afzal, Nahmina Begum, Huihui Zhao, Zhigang Fang, Laiqing Lou, Qingsheng Cai
AIMS: This study aimed to evaluate the effect of five cadmium-tolerant endophytic plant growth-promoting bacteria (PGPB) strains on the biomass and cadmium tolerance and accumulation of the bioenergy plant switchgrass (Panicum virgatum L.) under cadmium (Cd)-contaminated conditions. METHODS AND RESULTS: Five bacterial strains (Bj05, Le14, Ps14, So02, and Bo03) that could tolerate up to 2000 μmol l(-1) CdCl2 with a high Cd-binding capacity were isolated from plants grown in Cd-contaminated soil...
June 5, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28510258/diversity-of-plant-growth-promoting-bacteria-associated-with-sugarcane
#12
J E L Antunes, M C C P Lyra, F J Ollero, A D S Freitas, L M S Oliveira, A S F Araújo, M V B Figueiredo
The sugarcane (Saccharum spp) presents economic importance, mainly for tropical regions, being an important Brazilian commodity. However, this crop is strongly dependent on fertilizers, mainly nitrogen (N). This study assessed the plant growth-promoting bacteria (PGPB) associated with sugarcane that could be used as a potential inoculant to the crop. We evaluated the genetic diversity of PGPB in the plant tissue of sugarcane varieties (RB 867515, RB 1011, and RB 92579). The primer BOX-A1R was used to differentiate the similar isolated and further sequencing 16S rRNA ribosomal gene...
May 10, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28496135/isolated-bacillus-subtilis-strain-330-2-and-its-antagonistic-genes-identified-by-the-removing-pcr
#13
Zahoor Ahmad, Jia Wu, Lulu Chen, Wubei Dong
Plant growth-promoting bacteria (PGPB) may trigger tolerance against biotic/abiotic stresses and growth enhancement in plants. In this study, an endophytic bacterial strain from rapeseed was isolated to assess its role in enhancing plant growth and tolerance to abiotic stresses, as well as banded leaf and sheath blight disease in maize. Based on 16S rDNA and BIOLOG test analysis, the 330-2 strain was identified as Bacillus subtilis. The strain produced indole-3-acetic acid, siderophores, lytic enzymes and solubilized different sources of organic/inorganic phosphates and zinc...
May 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28382622/the-plant-growth-promoting-bacterium-kosakonia-radicincitans-improves-fruit-yield-and-quality-of-solanum-lycopersicum
#14
Beatrice Berger, Susanne Baldermann, Silke Ruppel
BACKGROUND: Production and the quality of tomato fruits have a strong economic relevance. Microorganisms such as the plant growth-promoting bacterium (PGPB) Kosakonia radicincitans (DSM 16656) have been demonstrated to improve shoot and root growth of young tomato plants, but data on yield increase and fruit quality by K. radicincitans are lacking. RESULTS: This study investigated how K. radicincitans affects tomato fruits. After inoculation of tomato seeds with K...
April 6, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28357640/azospirillum-spp-from-native-forage-grasses-in-brazilian-pantanal-floodplain-biodiversity-and-plant-growth-promotion-potential
#15
Mayara S T Souza, Valter A de Baura, Sandra A Santos, Paulo Ivan Fernandes-Júnior, Fábio B Reis Junior, Maria Rita Marques, Gecele Matos Paggi, Marivaine da Silva Brasil
A sustainable alternative to improve yield and the nutritive value of forage is the use of plant growth-promoting bacteria (PGPB) that release nutrients, synthesize plant hormones and protect against phytopathogens (among other mechanisms). Azospirillum genus is considered an important PGPB, due to the beneficial effects observed when inoculated in several plants. The aim of this study was to evaluate the diversity of new Azospirillum isolates and select bacteria according to the plant growth promotion ability in three forage species from the Brazilian Pantanal floodplain: Axonopus purpusii, Hymenachne amplexicaulis and Mesosetum chaseae...
April 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28258430/trimethylamine-removal-by-plant-capsule-of-sansevieria-kirkii-in-combination-with-bacillus-cereus-en1
#16
Chairat Treesubsuntorn, Phattara Boraphech, Paitip Thiravetyan
Trimethylamine (TMA) contamination produces a strong "fishy" odor and can cause pathological changes in humans. By screening native microorganisms from Sansevieria kirkii exposed to 100 ppm TMA, it was shown that endophytic bacteria number 1 (EN1) and number 2 (EN2) have a higher TMA tolerance and removal capacity than other bacteria species in a closed system. In addition, EN1 and EN2 demonstrated the ability to produce high quantities of indole-3-acetic acid (IAA) and use 1-aminocyclopropane-1-carboxylic acid (ACC), which is found normally in plant growth-promoting bacteria (PGPB)...
April 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28239369/plant-growth-promoting-bacteria-associated-with-langsdorffia-hypogaea-rhizosphere-host-biological-interface-a-neglected-model-of-bacterial-prospection
#17
Érica B Felestrino, Iara F Santiago, Luana da Silva Freitas, Luiz H Rosa, Sérvio P Ribeiro, Leandro M Moreira
Soil is a habitat where plant roots and microorganisms interact. In the region of the Brazilian Iron Quadrangle (IQ), studies involving the interaction between microbiota and plants have been neglected. Even more neglected are the studies involving the holoparasite plant Langsdorffia hypogaea Mart. (Balanophoraceae). The geomorphological peculiarities of IQ soil, rich in iron ore, as well as the model of interaction between L. hypogaea, its hosts and the soil provide a unique niche that acts as selective pressure to the evolution of plant growth-promoting bacteria (PGPB)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28145473/enhanced-performance-of-the-microalga-chlorella-sorokiniana-remotely-induced-by-the-plant-growth-promoting-bacteria-azospirillum-brasilense-and-bacillus-pumilus
#18
Edgar Amavizca, Yoav Bashan, Choong-Min Ryu, Mohamed A Farag, Brad M Bebout, Luz E de-Bashan
Remote effects (occurring without physical contact) of two plant growth-promoting bacteria (PGPB) Azospirillum brasilense Cd and Bacilus pumilus ES4 on growth of the green microalga Chlorella sorokiniana UTEX 2714 were studied. The two PGPB remotely enhanced the growth of the microalga, up to six-fold, and its cell volume by about three-fold. In addition to phenotypic changes, both bacteria remotely induced increases in the amounts of total lipids, total carbohydrates, and chlorophyll a in the cells of the microalga, indicating an alteration of the microalga's physiology...
February 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28106248/bacterial-impregnation-of-mineral-fertilizers-improves-yield-and-nutrient-use-efficiency-of-wheat
#19
Shakeel Ahmad, Muhammad Imran, Sabir Hussain, Sajid Mahmood, Azhar Hussain, Muhammad Hasnain
BACKGROUND: The fertilizer use efficiency (FUE) of agricultural crops is generally low, which results in poor crop yields and low economic benefits to farmers. Among the various approaches used to enhance FUE, impregnation of mineral fertilizers with plant growth-promoting bacteria (PGPB) is attracting worldwide attention. The present study was aimed to improve growth, yield and nutrient use efficiency of wheat by bacterially impregnated mineral fertilizers. RESULTS: Results of the pot study revealed that impregnation of diammonium phosphate (DAP) and urea with PGPB was helpful in enhancing the growth, yield, photosynthetic rate, nitrogen use efficiency (NUE) and phosphorus use efficiency (PUE) of wheat...
January 20, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28018305/inoculation-of-soil-with-plant-growth-promoting-bacteria-producing-1-aminocyclopropane-1-carboxylate-deaminase-or-expression-of-the-corresponding-acds-gene-in-transgenic-plants-increases-salinity-tolerance-in-camelina-sativa
#20
Zohreh Heydarian, Min Yu, Margaret Gruber, Bernard R Glick, Rong Zhou, Dwayne D Hegedus
Camelina sativa (camelina) is an oilseed crop touted for use on marginal lands; however, it is no more tolerant of soil salinity than traditional crops, such as canola. Plant growth-promoting bacteria (PGPB) that produce 1-aminocyclopropane-1-carboxylate deaminase (ACC deaminase) facilitate plant growth in the presence of abiotic stresses by reducing stress ethylene. Rhizospheric and endophytic PGPB and the corresponding acdS- mutants of the latter were examined for their ability to enhance tolerance to salt in camelina...
2016: Frontiers in Microbiology
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