title: Yeast microflora isolated from brazilian cassava roots: taxonomical classification based on molecular identification.
abstract: A rapid molecular identification technique was applied on microbial microflora isolated from Brazilian cassava roots given a yeast profile presented in the samples analyzed. A total of 24 strain isolated from cassava were initially grouped and identified in five groups using restriction-fragment length polymorphism (RFLPs) of 5.8S-ITS rDNA region. Sequencing analysis of the domains D1 and D2 of the 26S rRNA gene or 5.8S rRNA-ITS region were used to identify different groups of yeasts. Representative colonies of yeasts of each group were isolated and identified as Debaromyces hansenii, Kodamaea ohmeri, Candida glabrata, C. haemulonii, and Pichia gullhermondii. It is hoped that these results will contribute toward selecting yeast from this microflora capable to degrade cassava starch in the near future.
authors.affiliation: Universidade Federal do Pará, Laboratório de Investigação Sistemática em Biotecnologia e Química Fina, Belém, Brazil. nelson.ufpa@gmail.com
authors.forename: Nelson
authors.initials: N
authors.lastname: Ferreira
authors.forename: Carmela
authors.initials: C
authors.lastname: Belloch
authors.forename: Amparo
authors.initials: A
authors.lastname: Querol
authors.forename: Paloma
authors.initials: P
authors.lastname: Manzanares
authors.forename: Salvador
authors.initials: S
authors.lastname: Vallez
authors.forename: Alberdan
authors.initials: A
authors.lastname: Santos
mesh_terms: D044822:Biodiversity; D001938:Brazil; D016000:Cluster Analysis; D016172:DNA Fingerprinting; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000737:chemistry / Q000235:genetics; D055165:Debaryomyces; D020459:Genes, rRNA; D002365:Manihot / Q000382:microbiology*; D008969:Molecular Sequence Data; D010802:Phylogeny; D018517:Plant Roots / Q000382:microbiology*; D012150:Polymorphism, Restriction Fragment Length; D012331:RNA, Fungal / Q000235:genetics; D012335:RNA, Ribosomal / Q000235:genetics; D012340:RNA, Ribosomal, 5.8S / Q000235:genetics; D017422:Sequence Analysis, DNA; D015003:Yeasts / Q000145:classification* / Q000302:isolation & purification*
chemical_list: D004271:DNA, Fungal; D004275:DNA, Ribosomal; D021903:DNA, Ribosomal Spacer; D012331:RNA, Fungal; D012335:RNA, Ribosomal; D012340:RNA, Ribosomal, 5.8S; C065096:RNA, ribosomal, 26S