Transformation of organoarsenical species by the microflora of freshwater crayfish.
A study of the transformation of arsenic species by the microflora of the freshwater crayfish Procambarus clarkii was carried out. The study of the degradation of AB (arsenobetaine) was performed in aerobic conditions in two culture media (tryptic soy broth and saline medium) at two temperatures (30 and 8 degrees C). The microflora transformed AB into TMAO (trimethylarsine oxide), DMA (dimethylarsinate), MA (methylarsonate), and an unidentified compound (U1). The quickest transformations were carried out by microflora from hepatopancreas incubated in saline medium at 30 degrees C. The individualized study of other arsenic species [AC (arsenocholine), TETRA (tetramethylarsonium ion), TMAO, DMA, and MA] was also performed in saline medium. The only transformation observed was of AC into AB. The bacteria possibly responsible for AB degradation were isolated, identified by phenotypic and genotypic methods, and individually assayed for AB transformation. Only isolates allocated to the species Pseudomonas putida were able to metabolize AB.
Devesa
Vicenta
V
Instituto de Agroquímica y Tecnología de Alimentos (CSIC), Apdo 73, 46100, Burjassot, Valencia, Spain.
Loos
Andreas
A
Súñer
Maria Angeles
MA
Vélez
Dinoraz
D
Feria
Amparo
A
Martínez
Antonio
A
Montoro
Rosa
R
Sanz
Yolanda
Y
D000818:Animals; D001152:Arsenicals / Q000378:metabolism*; D003400:Astacoidea / Q000382:microbiology*; D001419:Bacteria / Q000378:metabolism*; D003470:Culture Media; D005618:Fresh Water; D043143:Hepatopancreas / Q000378:metabolism; D011551:Pseudomonas fluorescens / Q000378:metabolism; D016958:Pseudomonas putida / Q000378:metabolism; D013030:Spain
D001152:Arsenicals; D003470:Culture Media