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Mining the genome of Rhodococcus fascians, a plant growth-promoting bacterium gone astray

(2016) NEW BIOTECHNOLOGY. 33(5). p.706-717
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Abstract
Rhodococcus fascians is a phytopathogenic Gram-positive Actinomycete with a very broad host range encompassing especially dicotyledonous herbaceous perennials, but also some monocots, such as the Liliaceae and, recently, the woody crop pistachio. The pathogenicity of R. fascians strain D188 is known to be encoded by the linear plasmid pFiD188 and to be dictated by its capacity to produce a mixture of cytokinins. Here, we show that D188-5, the nonpathogenic plasmid-free derivative of the wild-type strain D188 actually has a plant growth-promoting effect. With the availability of the genome sequence of R. fascians, the chromosome of strain D188 was mined for putative plant growth-promoting functions and the functionality of some of these activities was tested. This analysis together with previous results suggests that the plant growth-promoting activity of R. fascians is due to production of plant growth modulators, such as auxin and cytokinin, combined with degradation of ethylene through 1-aminocyclopropane- 1-carboxylic acid deaminase. Moreover, R. fascians has several functions that could contribute to efficient colonization and competitiveness, but there is little evidence for a strong impact on plant nutrition. Possibly, the plant growth promotion encoded by the D188 chromosome is imperative for the epiphytic phase of the life cycle of R. fascians and prepares the plant to host the bacteria, thus ensuring proper continuation into the pathogenic phase.
Keywords
ACC-DEAMINASE, MYCOBACTERIUM-TUBERCULOSIS, RHIZOBACTERIA PGPR, BIOFILM FORMATION, STREPTOMYCES-TURGIDISCABIES, CORYNEBACTERIUM-FASCIANS, LEAFY GALL SYNDROME, EXCEPTIONALLY HIGH-LEVELS, PAENIBACILLUS-POLYMYXA E681, AGGLOMERANS PV. GYPSOPHILAE

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Citation

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Chicago
Francis, Isolde M, Elisabeth Stes, Yucheng Zhang, Diana Rangel, Kris Audenaert, and Danny Vereecke. 2016. “Mining the Genome of Rhodococcus Fascians, a Plant Growth-promoting Bacterium Gone Astray.” New Biotechnology 33 (5): 706–717.
APA
Francis, I. M., Stes, E., Zhang, Y., Rangel, D., Audenaert, K., & Vereecke, D. (2016). Mining the genome of Rhodococcus fascians, a plant growth-promoting bacterium gone astray. NEW BIOTECHNOLOGY, 33(5), 706–717.
Vancouver
1.
Francis IM, Stes E, Zhang Y, Rangel D, Audenaert K, Vereecke D. Mining the genome of Rhodococcus fascians, a plant growth-promoting bacterium gone astray. NEW BIOTECHNOLOGY. 2016;33(5):706–17.
MLA
Francis, Isolde M, Elisabeth Stes, Yucheng Zhang, et al. “Mining the Genome of Rhodococcus Fascians, a Plant Growth-promoting Bacterium Gone Astray.” NEW BIOTECHNOLOGY 33.5 (2016): 706–717. Print.
@article{8173936,
  abstract     = {Rhodococcus fascians is a phytopathogenic Gram-positive Actinomycete with a very broad host range encompassing especially dicotyledonous herbaceous perennials, but also some monocots, such as the Liliaceae and, recently, the woody crop pistachio. The pathogenicity of R. fascians strain D188 is known to be encoded by the linear plasmid pFiD188 and to be dictated by its capacity to produce a mixture of cytokinins. Here, we show that D188-5, the nonpathogenic plasmid-free derivative of the wild-type strain D188 actually has a plant growth-promoting effect. With the availability of the genome sequence of R. fascians, the chromosome of strain D188 was mined for putative plant growth-promoting functions and the functionality of some of these activities was tested. This analysis together with previous results suggests that the plant growth-promoting activity of R. fascians is due to production of plant growth modulators, such as auxin and cytokinin, combined with degradation of ethylene through 1-aminocyclopropane- 1-carboxylic acid deaminase. Moreover, R. fascians has several functions that could contribute to efficient colonization and competitiveness, but there is little evidence for a strong impact on plant nutrition. Possibly, the plant growth promotion encoded by the D188 chromosome is imperative for the epiphytic phase of the life cycle of R. fascians and prepares the plant to host the bacteria, thus ensuring proper continuation into the pathogenic phase.},
  author       = {Francis, Isolde M and Stes, Elisabeth and Zhang, Yucheng and Rangel, Diana and Audenaert, Kris and Vereecke, Danny},
  issn         = {1871-6784},
  journal      = {NEW BIOTECHNOLOGY},
  keyword      = {ACC-DEAMINASE,MYCOBACTERIUM-TUBERCULOSIS,RHIZOBACTERIA PGPR,BIOFILM FORMATION,STREPTOMYCES-TURGIDISCABIES,CORYNEBACTERIUM-FASCIANS,LEAFY GALL SYNDROME,EXCEPTIONALLY HIGH-LEVELS,PAENIBACILLUS-POLYMYXA E681,AGGLOMERANS PV. GYPSOPHILAE},
  language     = {eng},
  number       = {5},
  pages        = {706--717},
  title        = {Mining the genome of Rhodococcus fascians, a plant growth-promoting bacterium gone astray},
  url          = {http://dx.doi.org/10.1016/j.nbt.2016.01.009},
  volume       = {33},
  year         = {2016},
}

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