Mechanisms of Azospirillum in Plant Growth Promotion

DOI: 10.21276/sjavs.2017.4.9.3 Abstract: Azospirillum is one of the successful inoculants for di-nitrogen fixation and plant growth promotion in non-legume crops. It is micro-aerophillic microorganisms found mainly with cereals and grasses. Apart from dinitrogen fixation, it confers many other benefits to crop plants like improve seed germination, enhance seedling growth, enhancing proton flux, phosphorus solubilization, sequestration of iron, production of phytohormones, increase photosynthetic pigments, helping other plant growth promoters, enhance dry matter partitioning, restoration of vegetation in harsh environment, enhance seed quality, alleviate biotic and abiotic stresses, etc. It can be used as microbial inoculants of interest for overall success of plant in the field. I also enhance the adaptability of other bio-inoculants by providing wider benefits. In this mini-review, we are discussing such mechanisms which Azospirillum confers to plants.

[1]  V. Gupta,et al.  Abiotic Stress Responses and Microbe-Mediated Mitigation in Plants: The Omics Strategies , 2017, Front. Plant Sci..

[2]  P. Sahu,et al.  Ecological Success of Compatible Microbes in Consortia Isolated from Rice Rhizosphere for Growth and Yield of Mung Bean (Vigna radiata L.) , 2016 .

[3]  Amrita Gupta,et al.  Fluid Bed Dried Microbial Consortium for Enhanced Plant Growth: A Step towards Next Generation Bio Formulation , 2016 .

[4]  M. Feldman,et al.  THE RESPONSE OF A HORMONAL MUTANT OF COMMON WHEAT TO BACTERIA OF THE GENUS AZOSPIRILLUM , 2013 .

[5]  P. Sahu,et al.  Biofertilizers for Sustainability , 2012 .

[6]  A. Bano,et al.  Azospirillum strains isolated from roots and rhizosphere soil of wheat (Triticum aestivum L.) grown under different soil moisture conditions , 2010, Biology and Fertility of Soils.

[7]  M. Mihăşan,et al.  Rhizosphere bacteria help protein accumulation in soybean seeds. , 2009 .

[8]  C. Barassi,et al.  Seedlings growth promotion by Azospirillum brasilense under normal and drought conditions remains unaltered in Tebuconazole-treated wheat seeds , 2009 .

[9]  F. Cassan,et al.  Plant-growth-promoting compounds produced by two agronomically important strains of Azospirillum brasilense, and implications for inoculant formulation , 2007, Applied Microbiology and Biotechnology.

[10]  Zhenzhu Xu,et al.  Nitrogen metabolism in flag leaf and grain of wheat in response to irrigation regimes , 2006 .

[11]  Y. Bashan,et al.  Effect of root environment on proton efflux in wheat roots , 1989, Plant and Soil.

[12]  J. Döbereiner,et al.  Nitrogen fixation associated with grasses and cereals: Recent results and perspectives for future research , 1988, Plant and Soil.

[13]  Y. Bashan,et al.  Increase in auxiliary photoprotective photosynthetic pigments in wheat seedlings induced by Azospirillum brasilense , 2006, Biology and Fertility of Soils.

[14]  Y. Okon,et al.  Effect ofAzospirillum inoculation on nitrogen fixation and growth of several winter legumes , 2005, Plant and Soil.

[15]  Y. Bashan,et al.  Gluconic acid production and phosphate solubilization by the plant growth-promoting bacterium Azospirillum spp. , 2004, Naturwissenschaften.

[16]  G. Holguin,et al.  Azospirillum-plant relationships: physiological, molecular, agricultural, and environmental advances (1997-2003). , 2004, Canadian journal of microbiology.

[17]  J. G. Dubrovsky,et al.  Azospirillum spp. participation in dry matter partitioning in grasses at the whole plant level , 1996, Biology and Fertility of Soils.

[18]  H. Janzen,et al.  Evidence against associative N2 fixation as a significant N source in long-term wheat plots , 1995, Plant and Soil.

[19]  J. Döbereiner,et al.  Role of Azospirillum brasilense nitrate reductase in nitrate assimilation by wheat plants , 1987, Biology and Fertility of Soils.

[20]  J. Hatfield,et al.  Encyclopedia of Soils in The Environment , 2004 .

[21]  Y. Bashan,et al.  Alterations in membrane potential and in proton efflux in plant roots induced byAzospirillum brasilense , 2004, Plant and Soil.

[22]  Y. Bashan,et al.  Protection of Tomato Seedlings against Infection by Pseudomonas syringae pv. Tomato by Using the Plant Growth-Promoting Bacterium Azospirillum brasilense , 2002, Applied and Environmental Microbiology.

[23]  ’. Yaacovokon,et al.  AGRONOMIC APPLICATIONS OF AZOSPIRILLUM : AN EVALUATION OF 20 YEARS WORLDWIDE FIELD INOCULATION , 2002 .

[24]  Y. Bashan,et al.  Growth promotion of the seawater-irrigated oilseed halophyte Salicornia bigelovii inoculated with mangrove rhizosphere bacteria and halotolerant Azospirillum spp. , 2000, Biology and Fertility of Soils.

[25]  Y. Bashan,et al.  Effects of Resource‐Island Soils, Competition, and Inoculation with Azospirillum on Survival and Growth of Pachycereus pringlei, the Giant Cactus of the Sonoran Desert , 2000 .

[26]  J. Boutin,et al.  Nitrate assimilation in chicory roots (Cichorium intybus L.) which acquire radial growth. , 2000, Journal of experimental botany.

[27]  Y. Bashan.  INOCULANTS OF PLANT GROWTH-PROMOTING BACTERIA FOR USE IN AGRICULTURE , 1998 .

[28]  Y. Okon,et al.  Agronomic applications of azospirillum: An evaluation of 20 years worldwide field inoculation , 1994 .

[29]  L. Frioni,et al.  Azospirillum inoculation on maize (Zea mays): effect on yield in a field experiment in central argentina , 1994 .

[30]  A. Desai,et al.  PRODUCTION OF CATECHOLATE TYPE OF SIDEROPHORES BY AZOSPIRILLUM LIPOFERUM M , 1993 .

[31]  P. Barbieri,et al.  Effect on wheat root development of inoculation with an Azospirillum brasilense mutant with altered indole-3-acetic acid production. , 1993, Research in microbiology.

[32]  Y. Bashan,et al.  Effect of Inoculation with Azospirillum brasilense Strains on the Germination and Seedlings Growth of the Giant Columnar Cardon Cactus (Pachycereus pringlei) , 1993 .

[33]  Y. Bashan,et al.  Responses of soybean and cowpea root membranes to inoculation with Azospirillum brasilense , 1992 .

[34]  Y. Bashan,et al.  Nonspecific responses in plant growth, yield, and root colonization of noncereal crop plants to inoculation with Azospirillum brasilense Cd , 1989 .

[35]  R. Bottini,et al.  Identification of Gibberellins A(1), A(3), and Iso-A(3) in Cultures of Azospirillum lipoferum. , 1989, Plant physiology.

[36]  Y. Okon,et al.  Identification and quantification of IAA and IBA in Azospirillum brasilense-inoculated maize roots , 1989 .

[37]  G. Sandberg,et al.  Analysis of Indole-3-Acetic Acid and Related Indoles in Culture Medium from Azospirillum lipoferum and Azospirillum brasilense , 1988, Applied and environmental microbiology.

[38]  C. Christiansen-Weniger.  An Influence of Plant Growth Substances on Growth and Nitrogenase Activity from Azospirillum Brasiliense , 1988 .

[39]  Y. Okon,et al.  The effect of Azospirillum brasilense and auxin on root morphology in seedlings of Sorghum bicolor × Sorghum sudanense , 1987 .

[40]  V. Modi,et al.  Isolation and Characterization of Siderophores from Azospirillum lipoferum D-2 , 1986 .

[41]  K. Vlassak,et al.  Production of plant growth substances by Azospirillum sp. and other rhizosphere bacteria , 1986 .

[42]  P. Martín,et al.  Response of Plant Roots to Inoculation with Azospirillum Brasilense and to Application of Indole Acetic Acid , 1985 .

[43]  D. Patriquin,et al.  Root Hair Deformation, Bacterial Attachment, and Plant Growth in Wheat-Azospirillum Associations , 1984, Applied and environmental microbiology.

[44]  I. Watanabe,et al.  Response of wetland rice to inoculation with azospirillum lipoferum and pseudomonas Sp. , 1984 .

[45]  Y. Okon,et al.  Effect of Azospirillum inoculation on yield of field-grown wheat , 1983 .

[46]  A. Hartmann,et al.  Mutants of a azospirillum affected in nitrogen fixation and auxin production , 1983 .

[47]  J. Kigel,et al.  Yield Increases in Summer Cereal Crops in Israeli Fields Inoculated with Azospirillum , 1981, Experimental Agriculture.

[48]  A. Lahiri.  Interaction of water stress and mineral nutrition on growth and yield. , 1980 .

[49]  M. H. Gaskins,et al.  Plant Growth Substances Produced by Azospirillum brasilense and Their Effect on the Growth of Pearl Millet (Pennisetum americanum L.) , 1979, Applied and environmental microbiology.

[50]  R. Littell,et al.  Nitrogen Fixation in Grasses Inoculated with Spirillum lipoferum , 1976, Science.