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https://www.readbyqxmd.com/read/29580619/plant-growth-promoting-bacteria-as-an-alternative-strategy-for-salt-tolerance-in-plants-a-review
#1
REVIEW
Muhammad Numan, Samina Bashir, Yasmin Khan, Roqayya Mumtaz, Zabta Khan Shinwari, Abdul Latif Khan, Ajmal Khan, Ahmed Al-Harrasi
Approximately 5.2 billion hectare agriculture land are affected by erosion, salinity and soil degradation. Salinity stress has significantly affecting the fertile lands, and therefore possesses a huge impact on the agriculture and economy of a country. Salt stress has severe effects on the growth and development of plants as well as reducing its yield. Plants are inherently equipped with stress tolerance ability to responds the specific type of stress. Plants retained specific mechanisms for salt stress mitigation, such as hormonal stimulation, ion exchange, antioxidant enzymes and activation of signaling cascades on their metabolic and genetic frontiers that sooth the stressed condition...
April 2018: Microbiological Research
https://www.readbyqxmd.com/read/29551209/microbiome-engineering-to-improve-biocontrol-and-plant-growth-promoting-mechanisms
#2
REVIEW
Ma Del Carmen Orozco-Mosqueda, Ma Del Carmen Rocha-Granados, Bernard R Glick, Gustavo Santoyo
A plant microbiome includes a microbial community that typically interacts extensively with a plant. The plant microbiome can survive either inside or outside of plant tissues, performing various plant beneficial activities including biocontrol of potential phytopathogens and promotion of plant growth. An important part of the plant microbiome includes plant growth-promoting bacteria (PGPB) that commonly reside in the rhizosphere and phyllosphere, and as endophytic bacteria (inside of plant tissues). As new plant microbiome-manipulating strategies have emerged in recent years, we have critically reviewed relevant literature, chiefly from the last decade...
March 2018: Microbiological Research
https://www.readbyqxmd.com/read/29528805/molecular-insights-into-substrate-binding-mechanism-of-undecaprenyl-pyrophosphate-with-membrane-integrated-phosphatidyl-glycerophosphate-phosphatase-b-pgpb-using-molecular-dynamics-simulation-approach
#3
Manish Kesherwani, Devadasan Velmurugan
Undecaprenyl phosphate (C55-P) acts as carrier lipid in the synthesis of peptidoglycan, which is de novo synthesized from dephosphorylation of undecaprenyl pyrophosphate (C55-PP). The phosphatidylglycerol phosphate phosphatase B (PgpB) catalyzes the dephosphorylation of C55-PP and forms C55-P. As no structural study has been made regarding the binding of C55-PP to PgpB, in the current study, in silico molecular docking, followed by 150 ns molecular dynamics simulation of the putative binding complex in membrane/solvent environment has been performed to understand conformational dynamics...
March 12, 2018: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/29492373/indigenous-plant-growth-promoting-bacteria-enhance-plant-growth-biomass-and-nutrient-uptake-in-degraded-forest-plants
#4
Parthasarathy Radhapriya, Andimuthu Ramachandran, Perumal Palani
The present study was aimed to isolate indigenous plant growth-promoting bacteria (PGPB) from Nanmangalam reserve forest, India and to analyze their positive impact on nursery plant species. In total, 160 isolates were obtained from different nitrogen-free Media (LGI, JMV, NFB). Amongst these, 12 isolates were shown positive for 5-8% of ammonia production nif H positive and then isolates were further tested for their plant growth-promoting (PGP) activity. Based on their PGP activity, nine isolates were selected, and applied in nurseries of twelve native plant species, along with organic manure and inorganic fertilizer...
March 2018: 3 Biotech
https://www.readbyqxmd.com/read/29476114/alleviation-of-drought-stress-in-pulse-crops-with-acc-deaminase-producing-rhizobacteria-isolated-from-acidic-soil-of-northeast-india
#5
Juthika Saikia, Rupak K Sarma, Rajashree Dhandia, Archana Yadav, Rupjyoti Bharali, Vijai K Gupta, Ratul Saikia
The agricultural crops are often affected by the scarcity of fresh water. Seasonal drought is a major constraint on Northeast Indian agriculture. Almost 80% of the agricultural land in this region is acidic and facing severe drought during the winter period. Apart from classical breeding and transgenic approaches, the application of plant-growth-promoting bacteria (PGPB) is an alternative strategy for improving plant fitness under stressful conditions. The 1-aminocyclopropane-1-carboxylate (ACC) deaminase-producing PGPB offer drought stress tolerance by regulating plant ethylene levels...
February 23, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29466659/soil-bacteria-override-speciation-effects-on-zinc-phytotoxicity-in-zinc-contaminated-soils
#6
Nyekachi Adele, Bryne Ngwenya, Kate Victoria Heal, J Frederick Willem Mosselmans
The effects of zinc (Zn) speciation on plant growth in Zn-contaminated soil in the presence of bacteria are unknown but are critical to our understanding of metal biodynamics in the rhizosphere where bacteria are abundant. A 6-week pot experiment investigated the effects of two plant growth promoting bacteria (PGPB), Rhizobium leguminosarum and Pseudomonas brassicacearum, on Zn accumulation and speciation in Brassica juncea grown in soil amended with 600 mg kg-1 elemental Zn as three Zn species - soluble ZnSO4 and nanoparticles of ZnO and ZnS...
February 21, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29385570/ok-thanks-a-new-mutualism-between-chlamydomonas-and-methylobacteria-facilitates-growth-on-amino-acids-and-peptides
#7
Victoria Calatrava, Erik F Y Hom, Ángel Llamas, Emilio Fernández, Aurora Galván
Nitrogen is a key nutrient for land plants and phytoplankton in terrestrial and aquatic ecosystems. The model alga Chlamydomonas reinhardtii can grow efficiently on several inorganic nitrogen sources (e.g. ammonium, nitrate, nitrite) as well as many amino acids. In this study, we show that Chlamydomonas is unable to use proline, hydroxyproline and peptides that contain these amino acids. However, we discovered that algal growth on these substrates is supported in association with Methylobacterium spp., and that a mutualistic carbon-nitrogen metabolic exchange between Chlamydomonas and Methylobacterium spp...
April 1, 2018: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29384430/molecular-insights-into-the-involvement-of-a-never-ripe-receptor-in-the-interaction-between-two-beneficial-soil-bacteria-and-tomato-plants-under-well-watered-and-drought-conditions
#8
Pablo Ibort, Sonia Molina, Juan Manuel Ruiz-Lozano, Ricardo Aroca
Management of plant growth-promoting bacteria (PGPB) can be implemented to deal with sustainable intensification of agriculture. Ethylene is an essential component for plant growth and development and in response to drought. However, little is known about the effects of bacterial inoculation on ethylene transduction pathway. Thus, the present study sought to establish whether ethylene perception is critical for growth induction by two different PGPB strains under drought conditions and the analysis of bacterial effects on ethylene production and gene expression in tomatoes (Solanum lycopersicum)...
April 23, 2018: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/29145071/proteomic-analysis-reveals-that-tomato-interaction-with-plant-growth-promoting-bacteria-is-highly-determined-by-ethylene-perception
#9
Pablo Ibort, Hiroyuki Imai, Matsuo Uemura, Ricardo Aroca
Feeding an increasing global population as well as reducing environmental impact of crops is the challenge for the sustainable intensification of agriculture. Plant-growth-promoting bacteria (PGPB) management could represent a suitable method but elucidation of their action mechanisms is essential for a proper and effective utilization. Furthermore, ethylene is involved in growth and response to environmental stimuli but little is known about the implication of ethylene perception in PGPB activity. The ethylene-insensitive tomato never ripe and its isogenic wild-type cv...
January 2018: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28986676/mechanisms-of-action-of-plant-growth-promoting-bacteria
#10
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
#11
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
#12
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
#13
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...
September 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
#14
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...
January 2018: Journal of Plant Research
https://www.readbyqxmd.com/read/28780591/revealing-strategies-of-quorum-sensing-in-azospirillum-brasilense-strains-ab-v5-and-ab-v6
#15
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...
January 2018: Archives of Microbiology
https://www.readbyqxmd.com/read/28760324/the-role-of-plant-growth-promoting-bacteria-in-metal-phytoremediation
#16
REVIEW
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
#17
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
#18
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
#19
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
#20
S Afzal, N Begum, H Zhao, Z Fang, L Lou, Q 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...
August 2017: Journal of Applied Microbiology
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