The rhizosphere revisited: root microbiomics

Bakker, Peter A. H. M.; Berendsen, Roeland L.; Doornbos, Rogier F.; Wintermans, Paul C. A.; Pieterse, Corné M. J.

doi:10.3389/fpls.2013.00165

Cited by 383 publications

(239 citation statements)

References 90 publications

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“…1). The current knowledge of microorganisms living in the rhizosphere, their role, and their biotechnological and environmental applications has been summarized in several reviews Hirsch and Mauchline, 2012;Bakker et al, 2013;Mendes et al, 2013;Reed and Glick, 2013). This review focuses on the role of bacterial ACC deaminase in supporting the growth of plants exposed to environmental stress.…”

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confidence: 99%

Bacterial Modulation of Plant Ethylene Levels

2015

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A focus on the mechanisms by which ACC deaminase-containing bacteria facilitate plant growth.Bacteria that produce the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase, when present either on the surface of plant roots (rhizospheric) or within plant tissues (endophytic), play an active role in modulating ethylene levels in plants. This enzyme activity facilitates plant growth especially in the presence of various environmental stresses. Thus, plant growth-promoting bacteria that express ACC deaminase activity protect plants from growth inhibition by flooding and anoxia, drought, high salt, the presence of fungal and bacterial pathogens, nematodes, and the presence of metals and organic contaminants. Bacteria that express ACC deaminase activity also decrease the rate of flower wilting, promote the rooting of cuttings, and facilitate the nodulation of legumes. Here, the mechanisms behind bacterial ACC deaminase facilitation of plant growth and development are discussed, and numerous examples of the use of bacteria with this activity are summarized.

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Bacterial Modulation of Plant Ethylene Levels

2015

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“…In turn endophytes provide multifarious benefits such as promotion of plant growth and yield, phosphate solubilising, fixation nitrogen (Rosenblueth and Martinez Romero, 2006). Further, endophytic bacteria contribute close symbiotic association with the host which makes them more valuable biocontrol agents (Compant et al, 2005;Bakker et al, 2013). Compared to rhizospheric antagonist, endophytes have ability to enter the host system without stimulating pathogen induced vulnerability responses but triggering host defense pathways (Conn et al, 2008;Podolich et al, 2015).…”

Section: Study Of Cultural and Morphological Charactersmentioning

confidence: 99%

Antagonistic and growth promotion potential of endophytic bacteria of mulberry (Morus spp.)

Kumar¹,

Ramesh²,

Thipeswamy³

et al. 2015

International Journal of Industrial Entomology

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Endophytes provide multifarious benefits such as promotion of plant growth and yield, suppression of phyto-pathogens, phosphate solubilising and fixation nitrogen. A study has been carried out to explore growth promotion and antifungal activities of endophytes of mulberry (Morus spp.). Endophytic bacteria were isolated from mulberry plants and studied their cultural, morphological characters, growth promotion as well as their antifungal activity against Rhizoctonia bataticola and Fusarium oxysporum, two mulberry root rot associated pathogens. Except two isolates, all bacteria were colourless and the colony size of eight isolates was small. The margin of five isolates was irregular and the consistency of three isolates was creamy, six isolates was slimy and one was mucoid. Texture of seven isolates was convex and others were flat. Eight isolates were gram positive and the rest Gram negative, five were cocci and others were bacilli (rod shaped). Four isolates were motile and all were catalase positive and only three isolates were oxidase positive. Spore staining was positive only for two isolates. The growth promotion study showed that there was significant difference in root length and seedling length. The antagonistic effect of the bacterial isolates was tested against R. bataticola showed significant (p<0.05) influence of the bacteria, days after inoculation and their interaction on the inhibition of fungal growth. The isolate En-7 completely inhibited the fungus followed by En-5 (66.67%). The bacterial isolates significantly (p<0.05) inhibited growth of F. oxysporum in PDA. The mean inhibition was higher (70.45%) in case of En-7 followed by En-8 (68.65%) and En-10 (66.44%). The study reveals that some endophytic bacteria associated with mulberry have growth promotion and antifungal activity and could be explored for promotion of mulberry growth and managing root rot disease. potential to control two fungal pathogens associated with root rot disease of mulberry.

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“…Diversity and community structure of microorganisms in the rhizosphere are influenced both by plant and soil type (Latour et al, 1996). Plant root-microbe interaction can influence plant growth and nutrient dynamics and help the plant to alter the susceptibility to diseases and abiotic stress (Bakker et al, 2013;Glick, 2014). Microbial population in rhizosphere remains one to two order magnitude greater compared to barren soils (Curl and Truelove, 1986).…”

Section: Introductionmentioning

confidence: 99%