Perspective of beneficial microbes in agriculture under changing climatic scenario: a review
DOI:
https://doi.org/10.19071/jp.2016.v8.3022Abstract
Agriculture is a complex network of interactions of plants with microorganisms. There is a growing demand for ecologically compatible environment friendly technique in agriculture that might be able to provide adequate supply of nutrients for the increasing human populations through improvement of the quality and quantity of agricultural products. Under the changing climatic scenario of global fluxes of the key biogenic greenhouse gases (CO2, methane and nitrous oxide), and some other environmental problems, the application of beneficial microorganisms in agriculture would serve as an important alternative gateway to some of the traditional agricultural techniques. Microorganisms of agricultural importance represent key ecological strategy for integrated management practices like nutrient management, disease and pest management in order to reduce the use of chemicals in agriculture as well to improve cultivar performance. The present review is intended to focus on the emergence of agriculturally important microorganisms (AIMs) to develop an ideal agricultural system through efficient utilization of nutrients and recycling of energy and thereby to preserve the natural ecosystem resources under climate change. The progress to date in using the beneficial microflora in a variety of applications related to agriculture along with key mechanism of action is also discussed in this review.
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Adhya TK, Kumar N, Reddy G, Podile AR, Bee H, Bindiya S. Microbial mobilization of soil phosphorus and sustainable P management in agricultural soils. Curr Sci 2015; 108(7): 1280-1287.
Agarry OO, Akinyosoye FA, Adetuyi FC. Antagonistic property of microorganisms associated with cassava (Manihot esculenta Crantz) products. Afr J Biotechnol 2005; 4(7): 627–632.
Ahemad M, Kibret M. Mechanisms and applications of plant growth promoting rhizobacteria: current perspective. J King Saud Univ Sci 2014; 26: 1–20.
Ahemad M, Khan MS. Toxicity assessment of herbicides quizalafop-p-ethyl and clodinafop towards Rhizobium pea symbiosis. Bull Environ Contam Toxicol 2009; 82: 761–766.
Ahemad M, Khan MS. Comparative toxicity of selected insecticides to pea plants and growth promotion in response to insecticide-tolerant and plant growth promoting Rhizobium leguminosarum. Crop Prot 2010; 29: 325–329.
Ahemad M, Khan MS. Effect of tebuconazole-tolerant and plant growth promoting Rhizobium isolate MRP1 on pea-Rhizobium symbiosis. Sci Hortic 2011a; 129: 266–272.
Ahemad M, Khan MS. Pseudomonas aeruginosa strain PS1 enhances growth parameters of green gram [Vigna radiata (L.) Wilczek] in insecticide-stressed soils. J Pest Sci 2011b; 84: 123–131.
Ahemad M, Khan MS. Alleviation of fungicide-induced phytotoxicity in green gram [Vigna radiata (L.) Wilczek] using fungicide-tolerant and plant growth promoting Pseudomonas strain. Saudi J Biol Sci 2012a; 19: 451–459.
Ahemad M, Khan MS. Productivity of green gram in tebuconazole-stressed soil, by using a tolerant and plant growth promoting Bradyrhizobium sp. MRM6 strain. Acta Physiol Plant 2012b; 34: 245–254.
Aislabie J, Deslippe JR. Soil microbes and their contribution to soil services. In: Dymond, JR, editor. Ecosystem services in New Zealand – conditions and trends. Manaaki Whenua Press, Lincoln, New Zealand. 2013.
Alvindia DG, Natsuaki KT. Biocontrol activities of Bacillus amyloliquefaciens DGA 14 isolated from banana fruit surface against banana crown rot-causing pathogens. Crop Protect 2009; 28: 236-242.
Andreote FD, Gumiere T, Durrer A. Exploring interactions of plant microbiomes. Sci agric (Piracicaba, Braz.) 2014; 71(6): 528-539.
Arora DK, Saikia R, Dwievdi R, Smith D. Current status, strategy and future prospects of microbial resource collections. Curr Sci 2005; 89(3): 488-495.
Badri DV, Vivanco JM. Regulation and function of root exudates. 2009; 32(6): 666–681.
Bale JS, van Lenteren JC, Bigler F. Biological control and sustainable food production. Philos Trans R Soc Lond B Biol Sci 2008; 363(1492): 761–776.
Bansal AK. Bioinformatics in microbial biotechnology–a mini review. Microbiol Cell Fact 2005; 4:19.
Bardgett RD, Freeman C, Ostle NJ. Microbial contributions to climate change through carbon cycle feedbacks. The ISME J 2008; 2: 805–814.
Battelle GW. Putting technology to work: the very essence of technology transfer and commercialization. http://www.battelle.org./Environment/publications; 2000.
Begum MM, Sariah M, Abidin MAZ, Puteh AB, Rahman MA. Antagonistic potential of selected fungal and bacterial biocontrol agents against Colletotrichum truncatum of soybean seeds. Pertanica J Trop Agric Sci 2008; 31: 45-53.
Beneduzi, A., Peres, D., Vargas, L.K., Bodanese-Zanettini, M.H., Passaglia, L.M.P., 2008. Evaluation of genetic diversity and plant growth promoting activities of nitrogen-fixing Bacilli isolated from rice fields in South Brazil. Appl. Soil Ecol. 39, 311–320.
Berg G, Grube M, Schloter M, Smalla K. Unraveling the plant microbiome: looking back and future perspectives. Front Microbiol 2014; 5: 148.
Bertsch PM, Thomas GW. Potassium status of temperate region soils. In: Munson, RD, editor. Potassium in Agriculture. American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, Madison, WI. 1985. p. 131-162.
Bhardwaj D, Ansari MW, Sahoo RK, Tuteja N. Biofertilizers function as key player in sustainable agriculture by improving soil fertility, plant tolerance and crop productivity. Microb. Cell Fact. 2014; 13:66.
Bhattacharyya PN Diversity of microorganisms in the surface and subsurface soil of the Jia Bharali river catchment area of Brahmaputra plains. PhD Thesis, Gauhati University, Guwahati; 2012.
Bhattacharyya PN, Jha DK. Plant growth-promoting rhizobacteria (PGPR): emergence in agriculture. World J Microbiol Biotechnol. 2012; 28:1327-1350.
Bhattacharyya PN, Sarmah SR, Dutta P, Tanti AJ. Emergence in mapping microbial diversity in tea (Camellia sinensis (L.) O. Kuntze) soil of Assam, North-East India: a novel approach. Eur J Biotechnol and Biosci 2015; 3(12): 20-25.
Burg SP. Ethylene in plant growth. Proc Nat Acad Sci USA 1973; 70(2): 591-597.
Chandler D, Davidson G, Grant WP, Greaves J, Tatchell GM. Microbial biopesticides for integrated crop management: an assessment of environmental and regulatory sustainability. Trends Food Sci Tech 2008; 19: 275–283.
Chen X, Schauder S, Potier N, Van Dorsselaer A, Pelczer I, Bassler BL, Hughson FM. Structural identification of a bacterial quorum-sensing signal containing boron. Nature 2002; 415: 545–549.
Choudhary DK, Johri BN, Prakash A. Volatiles as priming agents that initiate plant growth and defence responses. Curr Sci 2008; 94(5): 595-604.
Classen, AT, Sundqvist, MK, Henning, JA, Newman, GS, Moore, JAM, Cregger, MA, Moorhea, LC, Patterson CM. Direct and indirect effects of climate change on soil microbial and soil microbial-plant interactions: What lies ahead? Ecosphere 2015; 6(8): 1-21.
Colwell RR. Microbial diversity: the importance of exploration and conservation. J Ind Microbiol Biotechnol 1997; 18(5):302-307.
Compant S, van der Heijden MGA, Sessitsch A. Climate change effects on beneficial plant-microorganism interactions. FEMS Microbiol Ecol 2010; 73: 197–214.
Contreras-Cornejo HA, MacÃas-RodrÃguez L, Cortes-Penagos C, Lopez-Bucio J. Trichoderma virens, a plant beneficial fungus, enhances biomass production and promotes lateral root growth through an auxin-dependent mechanism in Arabidopsis. Plant Physiol 2009; 149(3):1579–1592.
Cronin D, Moenne-Loccoz Y, Fenton A, Dunne C, Dowling DN, O’Gara F. Ecological interaction of a biocontrol Pseudomonas fluorescens strain producing 2, 4-diacetylphloroglucinol with the soft rot potato pathogen Erwinia carotovora subsp. atroseptica. FEMS Microbiol Ecol 1997; 23(2): 95–106.
Davidson EA, Janssens IA. Temperature sensitivity of soil carbon decomposition and feedbacks to climate change. Nature 2006; 440: 165-173.
Davey ME, O’toole GA. Microbial biofilms: from ecology to molecular genetics. Microbiol Mol Biol Rev 2000; 64(4): 847–867.
Demoz BT, Korsten L. Bacillus subtilis attachment, colonization, and survival on avocado flowers and its mode of action on stem-end rot pathogens. Biol Control 2006; 37: 68-74.
Djonovic S, Pozo MJ, Dangott LJ, Howell CR, Kenerley CM. Sm1, a proteinaceous elicitor secreted by the biocontrol fungus Trichoderma virens induces plant defense responses and systemic resistance. Mol Plant Microbe Interact 2006; 19(8): 838-853.
Egamberdiyeva D, Hoflich G. Influence of growth promoting bacteria on the growth of wheat in different soils and temperatures. Soil Biol Biochem 2003; 35: 973–978.
Farmer EE. Surface to air signals. Nature 2001; 411: 854–856.
Farrar K, Bryant D, Cope-Selby N. Understanding and engineering beneficial plant–microbe interactions: plant growth promotion in energy crops. Plant Biotechnol J 2014; 12(9): 1193–1206.
Ferreira JHS, Matthee FN, Thomas AC. Biological control of Euthypa lata on grape vine by an antagonistic strain of Bacillus subtilis. Phytopathology 1991; 81: 283-287.
Fransson PM, Taylor AF, Finlay RD. Mycelial production, spread and root colonisation by ectomycorrhizal fungi Hebeloma crustuliniforme and Paxillus involutus under elevated atmospheric CO2. Mycorrhiza 2005; 15: 25–31.
Fraser CM, Eisen JA, Salzberg SL. Microbial genome sequencing Nature 2000; 406: 799-803.
Fraser-Liggett CM. Insights on biology and evolution from microbial genome sequencing. Genome Res 2005; 15: 1603-1610.
Gill SS, Tuteja N. Reactive oxygen species and antioxidant machinery in abiotic stress tolerance in crop plants. Plant Physiol Biochem 2010; 48: 909-930.
Glick BR. Plant growth-promoting bacteria: mechanisms and applications. Hindawi Publishing Corporation, Scientifica; 2012.
Gornall J, Betts R, Burke E, Clark R, Camp J, Willett K, Wiltshire A. Implications of climate change for agricultural productivity in the early twenty-first century. Philos Trans R Soc Lond B Biol Sci 2010; 365(1554): 2973–2989.
Gregory GGF, Schreiber LR, Leben C. Microorganisms antagonistic for producing antibiotic inhibitory to Ceratocysits ulmi. Phytopathology 1986; 74: 804-805.
Grover M, Ali SZ, Sandhya V, Rasul A, Venkateswarlu B. Role of microorganisms in adaptation of agriculture crops to abiotic stresses. World J Microbiol Biotechnol 2011; 27:1231-1240.
Hadar Y, Chet I, Henis Y. Biological control of Rhizoctonia solani damping off with wheat bran culture of Trichoderma harzianum. Phytopathology 1979; 69: 64-68.
Hajieghrari B, Torabi-Giglou M, Mohammadi MR, Davari M. Biological potential of some Iranian Trichoderma isolates in the control of soil borne plant pathogenic fungi. Afr J Biotechnol 2008; 7(8): 967-972.
Han J, Sun L, Dong X, Cai Z, Sun X, Yang H, Wang Y, Song W. Characterization of a novel plant growth-promoting bacteria strain Delftia tsuruhatensis HR4 both as a diazotroph and a potential biocontrol agent against various plant pathogens. Syst Appl Microbiol 2005; 28(1): 66–76.
Hasan MA. Investigation on the nitrogen fixing Cyanobacteria (BGA) in rice fields of North-West region of Bangladesh. III. Filamentous (heterocystous) J Environ Sci Natural Resources 2013; 6(1): 253-259.
Higa T, Parr JF. Beneficial and effective microorganisms for a sustainable agriculture and environment. International Nature Farming Research Center, Atami, Japan; 1994.
Higa T, Wididana GN The concept and theories of effective microorganisms. In: Higa, T, Parr, JF, editors. Beneficial and effective microorganisms for a sustainable agriculture and environment. International Nature Farming Research Centre, Atami, Japan; 1991.
Holden MT, Ram Chhabra S, de Nys R, Stead P, Bainton NJ, Hill PJ,
Manefield M, Kumar N, Labatte M, England D, Rice S, Givskov M, Salmond GP, Stewart GS, Bycroft BW, Kjelleberg S, Williams P. Quorum-sensing cross-talk: isolation and chemical characterization of cyclic dipeptides from Pseudomonas aeruginosa and other gram-negative bacteria. Mol Microbiol 1999; 33(6): 1254–1266.
Hunter P. Natural solutions to climate change. greenhouse gases, high-energy crops and the future of the world. EMBO Rep. 2008; 9(6): 508–511.
Imtiaj A, Lee Tae-Soo. Antagonistic effect of three Trichoderma species on the Alternaria porri pathogen of onion blotch. World J Agric Sci 2008; 4: 13-17.
Ineichen K, Wiemken V, Wiemken A. Shoots, roots and ectomycorrhiza formation of pine seedlings at elevated atmospheric carbon dioxide. Plant Cell Environ 1995; 18: 703–707.
Jahanian A, Chaichi MR, Rezaei K, Rezayazdi K, Khavazi K. The effect of plant growth promoting rhizobacteria (pgpr) on germination and primary growth of artichoke (Cynara scolymus). Int J Agric Crop Sci 2012; 4: 923–929.
Jeffries P. Biology and ecology of mycoparasitism. Can J Bot 1995; 73: 1284-1290.
Jeffries P, Barea JM. Arbuscular mycorrhiza: a key component of sustainable plant-soil ecosystems. In: Hock, B, editor. The Mycota (Vol. IX: Fungal Associations), Springer, Berlin Heidelberg New York, 2001.
Kapoor R, Ruchi, Kumar A, Kumar A, Patil S, Pratush A Kaur M. Indole acetic acid production by fluorescent Pseudomonas isolated from the rhizospheric soils of Malus and Pyrus. Recent Res Sci Technol 2012; 4(1): 06-09.
Khan A, Jilani G, Akhtar MS, Naqvi SMS, Rasheed M. Phosphorus solubilizing bacteria: occurrence, mechanisms and their role in crop production. J agric biol sci 2009; 1(1): 48-58.
Kheyrodin H, Ghazvinian K. Effect of climate change on soil global microorganisms. J Biol Chem Res 2012; 29(2): 310-319.
Kloepper JW, Gutierrez-Estrada A, Mclnroy JA. Photoperiod regulates elicitation of growth promotion but not induced resistance by plant growth-promoting rhizobacteria. Can J Microbiol 2007; 53(2): 159–167.
Kumar A, Bisht BS, Joshi VD, Dhewa T. Review on bioremediation of polluted environment: a management tool. Int J Environ Sci 2011; 1(6): 1079-1093.
Kumar, S, Thakur, M, Rani A. Trichoderma: mass production, formulation, quality control, delivery and its scope in commercialization in India for the management of plant diseases. Afr J Agric Res 2014; 9(53): 3838-3852.
Lian B, Wang B, Pan M, Liu C, Teng HH. Microbial release of potassium from K-bearing minerals by thermophilic fungus Aspergillus fumigatus. Geochimica et Cosmochimica Acta 2008; 72:87–98.
Liu D, Lian B, Dong H. Isolation of Paenibacillus sp. and assessment of its potential for enhancing mineral weathering. Geomicrobiology J 2012; 29:413–421.
Ma Y, Rajkumar M, Luo Y, Freitas H. Inoculation of endophytic bacteria on host and non-host plants-effects on plant growth and Ni uptake. J Hazard Mater 2011; 95: 230–237.
Madhu M, Hatfield JL. Dynamics of plant root growth under increased atmospheric carbon dioxide. Agron J 2013; 105: 657-669.
Mahadtanapuk S, Sanguansermsri M, Cutler WR, Sardsud V, Anuntalabhochai S. Control of anthracnose caused by Colletotrichum musae on Curcuma alismatifolia using antagonistic Bacillus spp. Amer J Agric Biol Sci 2007; 2: 54-61.
Marasco R, Rolli E, Ettoumi B, Vigani G, Mapelli F, Borin S, Abou-Hadid AF, El-Behairy UA, Sorlini C, Cherif A, Zocchi G, Daffonchio D. A drought resistance-promoting microbiome is selected by root system under desert farming. PLoS One 2012; 7(10): e48479.
McClure NC, Ahmadi Ali-Reza, Clare BG. Construction of a range of derivatives of the biological control strain Agrobacterium rhizogenes K84: a study of factors involved in biological control of crown gall disease. Appl Environ Microbiol 1998; 64: 3977–3982.
Mejia LC, Rojas EI, Maynard Z, Bael SV, Arnold AE, Hebbar P, Samuels GJ, Robbins N, Herre EA. Endophytic fungi as biocontrol agents of Theobroma cacao pathogens. Biol Control 2008; 46(1): 4–14.
Mesle M, Dromart G, Oger P. Microbial methanogenesis in subsurface oil and coal. Res Microbiol 2013; 164(9): 959–972.
Mia, M.A.B., Shamsuddin, Z.H., Wahab, Z., and Marziah, M. 2010. Effect of plant growth promoting rhizobacterial (PGPR) inoculation on growth and nitrogen incorporation of tissue-cultured Musa plantlets under nitrogen-free hydroponics condition. AJCS 4(2):85-90.
Miao B, Stewart BA, Zhang, F. Long-term experiments for sustainable nutrient management in China. a review. Agron sustain Dev 2011; 31(2): 397-414.
Miller MB, Bassler BL. Quorum sensing in bacteria. Annu Rev Microbiol 2001; 55: 165-99.
Mohammadi K. Phosphorus solubilizing bacteria: occurrence, mechanisms and their role in crop production. Resources Environment 2012; 2(1): 80-85.
Mohseni M, Norouzi H, Hamedi J, Roohi A. Screening of antibacterial producing actinomycetes from sediments of the caspian sea. Int J Mol Cell Med 2013; 2(2): 64–71.
Murali M. Amruthesh KN, Sudisha J, Niranjana SR, Shetty HS. Screening for plant growth promoting fungi and their ability for growth promotion and induction of resistance in pearl millet against downy mildew disease. J Phytology 2012; 4(5): 30-36.
Neeno-Eckwall EC, Schottel JL. Occurrence of antibiotic resistance in the biological control of potato scab disease. Biol Control 1999; 16(2): 199–208.
Neill C, Gignoux J. Soil organic matter decomposition driven by microbial growth: a simple model for a complex network of interactions. Soil Biol Biochem 2006; 38(4): 803–811.
Nicholson WL, Munakata N, Horneck G, Melosh HJ, Setlow P. Resistance of Bacillus endospores to extreme terrestrial and extraterrestrial environments. Microbiol Mol Biol Rev 2000; 64(3): 548–572.
Nihorimbere V, Ongena M, Smargiassi M, Thonart P. Beneficial effect of the rhizosphere microbial community for plant growth and health. Biotechnol Agron Soc Environ 2011; 15(2): 327-337.
Niklaus PA, Alphei J, Kampichler C, Kandeler E, Korner C, Tscherko D, Wohlfender M. Interactive effects of plant species diversity and elevated CO2 on soil biota and nutrient cycling. Ecology 2007; 88(12): 3153-3163.
Ortiz-Castro R, Contreras-Cornejo HA, MacÃas-RodrÃguez L, Lopez-Bucio J. The role of microbial signals in plant growth and development. Plant Signal Behav 2009; 4(8): 701–712.
Panhwar QA, Radziah O, Zaharah AR, Sariah M, Razi IM. Role of phosphate solubilizing bacteria on rock phosphate solubility and growth of aerobic rice. J Environ Biol 2011: 32, 607-612.
Penyalver R, Lopez MM. Co-colonization of the rhizosphere by pathogenic Agrobacterium strains and nonpathogenic strains K84 and K1026, used for crown gall biocontrol. Appl Environ Microbiol 1999; 65: 1936–1940.
Perez-Montano F, AlÃas-Villegas C, Bellogin RA, del Cerro P, Espuny MR, Jimenez-Guerrero I, Lopez-Baena FJ, Ollero FJ, Cubo T. Plant growth promotion in cereal and leguminous agricultural important plants: from microorganism capacities to crop production. Microbiol Res 2014; 169: 325–336.
Phukan I, Madhab M, Sarmah SR, Bordoloi M, Nair SC, Dutta P, Rai S, Debnath S, Barthakur BK. Exploitation of PGP microbes of tea for improvement of plant growth and pest suppression: a novel approach. Two Bud 2012; 59(1): 69-74.
Plimmer JR. Chemicals for agriculture IAEA Bulletin 1984; 26(2): 13-16.
Prosser JI. Microorganisms cycling soil nutrients and their diversity, in modern soil microbiology. In: Van Elsas, JD, Jansson, JK, Trevors, JT, editors. CRC Press, New York, NY; 2007. pp. 237–261.
Rahi P, Vyas P, Sharma S, Gulati A, Gulati A. Plant growth promoting potential of the fungus Discosia sp. FIHB 571 from tea rhizosphere tested on chickpea, maize and pea. Indian J Microbiol 2009; 49: 128–133.
Rahul K, Amrita K, Singh M. Trichoderma: a most powerful bio-control agent-a review. Trends Biosci 2014; 7(24): 4055-4058.
Rajkumar M, Freitas H. Effects of inoculation of plant growth promoting bacteria on Ni uptake by Indian mustard. Bioresour Technol 2008; 99: 3491–3498.
Rana A, Saharan B, Nain L, Prasanna R, Shivay YS. Enhancing micronutrient uptake and yield of wheat through bacterial PGPR consortia. Soil Sci Plant Nutri 2012; 58(5): 573-582.
Rhodes CJ. Mycoremediation (bioremediation with fungi) – growing mushrooms to clean the earth. Chem Spec Bioavailab 2014; 26(3): 196-198.
Roberts SC, Shuler ML. Large scale plant cell culture. Curr Opin Biotechnol 1997; 8: 154–159.
Rodriguez H, Fraga R. Phosphate solubilizing bacteria and their role in plant growth promotion. Biotechnol Adv 1999; 17(4-5): 319-339.
Roossinck MJ. The good viruses: viral mutualistic symbioses. Nature Reviews Microbiol 2011; 9: 99-108.
Russo A, Carozza GP, Vettori L, Felici C, Cinelli F, Toffanin A. Plant beneficial microbes and their application in plant biotechnology. In: Agbo, EC, editor. Innovations in Biotechnology. Kindle Edition, Rijeka, Croatia, 2012; pp. 57-72.
Rutherford ST, Bassler BL. Bacterial quorum sensing: its role in virulence and possibilities for its control. Cold Spring Harb Perspect Med 2012; 2(11): a012427.
Ryu Choong-Min, Farag MA, Hu Chia-Hui, Reddy MS, Kloepper JW, Pare PW. Bacterial volatiles induce systemic resistance in Arabidopsis. Plant Physiol 2004; 134: 1017–1026.
Saba H, Vibhash D, Manisha M, Prashant KS, Farhan H, Tauseef A. Trichoderma - a promising plant growth stimulator and biocontrol agent. Mycosphere 2012; 3(4): 524–531.
Salvioli A, Ghignone S, Novero M, Navazio L, Venice F, Bagnaresi P, Bonfante P. Symbiosis with an endobacterium increases the fitness of a mycorrhizal fungus, raising its bioenergetic potential. The ISME Journal 2016; 10(1): 130–144.
Santhanam R, Groten K, Meldau DG, Baldwin IT. Analysis of plant-bacteria interactions in their native habitat: bacterial communities associated with wild tobacco are independent of endogenous jasmonic acid levels and developmental stages. PLoS One 2014; 9(4): e94710.
Sardans J, Penuelas J. The role of plants in the effects of global change on nutrient availability and stoichiometry in the plant-soil system. Plant Physiol 2012; 160(4): 1741-1761.
Sarmah SR, Dutta P, Begum R, Tanti AJ, Phukan I, Debnath S. Barthakur, BK. Microbial bioagents for controlling diseases of tea. Proc Int Symp Innovation in Tea Sci sus Dev in tea industry. China Tea Sci Soc Unilever Hangzhou China, 2005; pp 767-776.
Saxena J, Basu P, Jaligam V, Chandra S. Phosphate solubilization by a few fungal strains belonging to the genera Aspergillus and Penicillium. Afr J Microbiol Res 2013; 7(41): 4862-4869.
Scherr SJ, McNeely JA. Biodiversity conservation and agricultural sustainability: towards a new paradigm of ‘ecoagriculture’ landscapes. Philos Trans R Soc Lond B Biol Sci 2008; 363(1491): 477–494.
Sessitsch A, Kuffner M, Kidd P, Vangronsveld J, Wenzel WW, Fallmann K, Puschenreiter M. The role of plant-associated bacteria in the mobilization and phytoextraction of trace elements in contaminated soils. Soil Biol Biochem 2013; 60(100): 182–194.
Sharma AK, Bhattacharyya PN, Rajkhowa DJ, Jha DK. Impact of global climate change on beneficial plant-microbe association. Ann Biol Res 2014; 5(3): 36-37.
Sharma SB, Sayyed RZ, Trivedi MH, Gobi TA. Phosphate solubilizing microbes: sustainable approach for managing phosphorus deficiency in agricultural soils. Springerplus 2013; 2: 587.
Sheng XF. 2005. Growth promotion and increased potassium uptake of cotton and rape by a potassium releasing strain of Bacillus edaphicus. Soil Biol Biochem 37(10):1918-1922.
Shridhar BS. Review: nitrogen fixing microorganisms. Int J Microbiol Res 2012; 3(1): 46-52.
Singh LP, Gill SS, Tuteja N. Unraveling the role of fungal symbionts in plant abiotic stress tolerance. Plant Signal Behav 2011; 6(2): 175–191.
Singh R, Singh P, Sharma R. Microorganism as a tool of bioremediation technology for cleaning environment: a review. Proc Int Acad Ecol Environ Sci 2014; 4(1): 1-6.
Somers E, Vanderleyden J, Srinivasan M (2004) Rhizosphere bacterial signalling: a love parade beneath our feet. Crit Rev Microbiol 30:205–240.
Sood A, Sharma S, Kumar V, Thakur RL. Antagonism of dominant bacteria in tea rhizosphere of Indian Himalayan regions. J Appl Sci Environ Manage 2007; 11(4): 63-66.
Sparks DL, Huang PM. 1985. Physical chemistry of soil potassium. pp. 201-276. In: R. D. Munson (ed.) Potassium in agriculture. American Society of Agronomy, Madison, WI.
Steeghs M, Bais HP, de Gouw J, Goldan P, Kuster W, Northway M, Fall R, Vivanco JM. Proton-transfer-reaction mass spectrometry as a new tool for real time analysis of root-secreted volatile organic compounds in Arabidopsis. Plant Physiol 2004; 135(1): 47-58.
Thakur M, Sohal BS. Role of elicitors in inducing resistance in plants against pathogen infection: a review. ISRN Biochemistry 2013; pp 1-10.
Tolba IH, Soliman MA. Efficacy of native antagonistic bacterial isolates in biological control of crown gall disease in Egypt. Annals Agri Sci 2013; 58(1): 43–49.
Turner TR, James EK, Poole PS. The plant microbiome. Genome Biol 2013; 14(6): 209.
Vacheron J, Desbrosses G, Bouffaud ML, Touraine B, Moenne-Loccoz Y, Muller D, Legendre L, Wisniewski-Dye F, Prigent-Combaret C. Plant growth-promoting rhizobacteria and root system functioning. Front Plant Sci 2013; 4:356.
van Loon LC. Plant responses to plant growth-promoting rhizobacteria. Eur J Plant Pathol 2007; 119: 243–254.
Verstraete W, Wittelbolle WL, Heylen K, Vanparys B, de Vos P, van de Wiele T, Boon N. Microbial resource management: the road to go for environmental biotechnology. Eng Life Sci 2007; 7(2): 117–126.
Vessey JK (2003) Plant growth promoting rhizobacteria as biofertilizers. Plant Soil 255:571–586.
von Bodman SB, Bauer WD, Coplin DL. Quorum-sensing in plant-pathogenic bacteria. Annu Rev Phytopathol 2003; 41: 455–482.
Waldon HB, Jenkins MB, Virginia RA, Harding EE. Characteristics of woodland rhizobial populations from surface- and deep-soil environments of the Sonoran Desert. Appl Environ Microbiol 1989; 55(12): 3058–3064.
Walpola BC, Min-Ho Y. Prospectus of phosphate solubilizing microorganisms and phosphorus availability in agricultural soils: a review. Afr J Microbiol Res 2012; 6(37): 6600-6605.
Wang ET, Martinez-Romero E (2000) Sesbania herbacea-Rhizobium huautlense nodulation in flooded soils and comparative characterization of S. herbacea-nodulating rhizobia in different environments. Microb Ecol 40:25–32.
Yamada Y, Nihira T. Microbial hormones and microbial chemical ecology. In: Barton, DHR, Nakanishi, K, editors. Comprehensive natural products chemistry. Elsevier Sciences, Amsterdam 1998; 8:377–413.
Yang Y, Shah J, Klessig DF. Signal perception and transduction in plant defense responses. Genes Dev 1997; 11(13): 1621-1639.
Yung-Hua Li, Tian X. Quorum sensing and bacterial social interactions in biofilms. Sensors (Basel) 2012; 12(3): 2519–2538.
Zahir ZA, Muhammad A, Frankenberger WT. Plant growth promoting rhizobacteria: applications and perspectives in agriculture. Adv Agron 2004; 81: 97–168.
Zivkovic S, Stojanovic S, Ivanovic Z, Gavrilovic V, Popovic T, Balaz J. Screening of antagonistic activity of microorganisms against Colletotrichum acutatum and Colletotrichum gloeosporioides. Arch Biol Sci Belgrade 2010; 62(3): 611-623.
.