Resumo

GUTIERREZ SANCHEZ, Pablo Andrés; ALZATE, Juan Fernando  e  MARIN MONTOYA, Mauricio. Analysis of Carbohydrate Metabolism Genes of Spongospora subterranea Using 454 Pyrosequencing. Rev. Fac. Nac. Agron. Medellín [online]. 2014, vol.67, n.2, pp.7247-7260. ISSN 0304-2847.  https://doi.org/10.15446/rfnam.v67n2.44166.

Spongospora subterranea, the causal agent of Potato powdery scab, is an important soil-borne obligate protozoan commonly found in Andean soils. This is a serious problem that causes cosmetic damage on the skin of tubers and induces root gall formation, diminishing the yield and commercial value of the potato. Genetic studies on S. subterranea are difficult due to its obligate parasitism, which explains the lack of available knowledge on its basic biology. S. subterranea is a member of the Plasmodiophorida order, a protist taxa that includes other important plant pathogens such as Plasmodiophora brassicae and Spongospora nasturtii. Little is known about the genomes of Plasmodiophorida; however, with the use of Next-Generation Sequencing technologies combined with appropriate bioinformatic techniques, it is possible to obtain genomic sequences from obligate pathogens such as S. subterranea. To gain a better understanding of the biology of this pathogen and Plasmodiophorida in general, DNA sequences from a cystosori-enriched sample of S. subterranea were obtained using 454 pyrosequencing technology. As a first step in understanding the nutritional requirements of S. subterranea as well as its infective and resistance structures, we present a bioinformatic analysis of 24 contigs related to genes involved in the glycolysis, starch, celullose and chitin metabolism. Intron structure and codon usage is also discussed. The genes analyzed in this study are a good source of information for studies aimed at characterizing these enzymes in vitro, as well as the generation of new methods for the molecular detection of S. subterranea in either soils or infected plants.

Palavras-chave : Genomics; Plasmodiophora; powdery scab; Solanum tuberosum.

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