Candidimonas nitroreducens gen. nov., sp. nov. and Candidimonas humi sp. nov., isolated from sewage sludge compost.
Two bacterial strains (SC-089(T) and SC-092(T)) isolated from sewage sludge compost were characterized by using a polyphasic approach. The isolates were Gram-negative short rods, catalase- and oxidase-positive, and showed good growth at 30 °C, at pH 7 and with 1 % (w/v) NaCl. Ubiquinone 8 was the major respiratory quinone, and phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol were amongst the major polar lipids. On the basis of 16S rRNA gene sequence analysis, the strains were observed to be members of the family Alcaligenaceae, but could not be identified as members of any validly described genus. The low levels of 16S rRNA gene sequence similarity to other recognized taxa, together with comparative analysis of phenotypic traits and chemotaxonomic markers, supported the proposal of a new genus within the family Alcaligenaceae, for which the name Candidimonas gen. nov. is proposed. Strains SC-089(T) and SC-092(T), which shared 99.1 % 16S rRNA gene sequence similarity, could be differentiated at the phenotypic level, and DNA-DNA hybridization results supported their identification as representing distinct species. The names proposed for these novel species are Candidimonas nitroreducens sp. nov. (type strain, SC-089(T) = LMG 24812(T) = CCUG 55806(T)) and Candidimonas humi sp. nov. (type strain, SC-092(T) = LMG 24813(T) = CCUG 55807(T)).
LEPAE - Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, 4200-465 Porto, Portugal.|CBQF - Escola Superior de Biotecnologia, Universidade Católica Portuguesa, 4200-072 Porto, Portugal.
Ivone
I
Vaz-Moreira
CBQF - Escola Superior de Biotecnologia, Universidade Católica Portuguesa, 4200-072 Porto, Portugal.
Vânia
V
Figueira
LEPAE - Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, 4200-465 Porto, Portugal.
Ana R
AR
Lopes
Laboratorium voor Microbiologie, Vakgroep Biochemie en Microbiologie, Universiteit Gent, Gent, Belgium.
Evie
E
De Brandt
Laboratorium voor Microbiologie, Vakgroep Biochemie en Microbiologie, Universiteit Gent, Gent, Belgium.
Peter
P
Vandamme
LEPAE - Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, 4200-465 Porto, Portugal.
Olga C
OC
Nunes
CBQF - Escola Superior de Biotecnologia, Universidade Católica Portuguesa, 4200-072 Porto, Portugal.
Célia M
CM
Manaia
D042401:Alcaligenaceae / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification* / Q000502:physiology; D015373:Bacterial Typing Techniques; D002374:Catalase / Q000378:metabolism; D016000:Cluster Analysis; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005227:Fatty Acids / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010088:Oxidoreductases / Q000378:metabolism; D010743:Phospholipids / Q000032:analysis; D010802:Phylogeny; D011809:Quinones / Q000032:analysis; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012722:Sewage / Q000382:microbiology*; D012965:Sodium Chloride / Q000378:metabolism; D012987:Soil; D013696:Temperature
D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D010743:Phospholipids; D011809:Quinones; D012336:RNA, Ribosomal, 16S; D012722:Sewage; D012987:Soil; D012965:Sodium Chloride; D010088:Oxidoreductases; D002374:Catalase