The response of Prorocentrum sigmoides and its associated culturable bacteria to metals and organic pollutants.

Autor: D'Costa PM; Department of Microbiology, Goa University, Taleigao Plateau, Goa, India., Kunkolienkar RSS; Department of Microbiology, Goa University, Taleigao Plateau, Goa, India., Naik AG; Department of Microbiology, Goa University, Taleigao Plateau, Goa, India., Naik RK; Southern Ocean Studies, ESSO-National Centre for Polar and Ocean Research, Vasco-da-Gama, Goa, India., Roy R; National Remote-Sensing Centre-Earth and Climate Science Area, Indian Space Research Organization, Hyderabad, Telangana, India.
Jazyk: angličtina
Zdroj: Journal of basic microbiology [J Basic Microbiol] 2019 Oct; Vol. 59 (10), pp. 979-991. Date of Electronic Publication: 2019 Aug 30.
DOI: 10.1002/jobm.201900244
Abstrakt: This study investigates the effect of metals (cadmium, lead, mercury, and tellurium) and organic pollutants (benzene, diesel, lindane, and xylene) on a dinoflagellate-Prorocentrum sigmoides Böhm-and its associated culturable bacteria. Two bacterial cultures (Bacillus subtilis strain PD005 and B. xiamensis strain PD006) were isolated from P. sigmoides and characterized by scanning electron microscopy, 16S ribosomal RNA sequencing, biochemical analyses, and growth curve studies. This study points to a mutualistic relationship between P. sigmoides and its associated Bacillus isolates. P. sigmoides enhanced the growth of its associated Bacillus spp., through the secretion of extracellular exudates. In return, both Bacillus isolates contributed to the resistance of P. sigmoides to metals and organic pollutants. P. sigmoides and both Bacillus isolates exhibited concentration-dependent responses to metals and organic pollutants. An intriguing feature was the similar response of P. sigmoides and its associated Bacillus isolates to mercury and cadmium, indicating a co-selection of mercury and cadmium resistance. This provides support to the "dinoflagellate host-phycosphere bacteria" behaving as a single functional unit. However, the sensitivity profiles of P. sigmoides and its associated Bacillus isolates are different with respect to metals versus organic pollutants. These aspects need to be addressed in future studies to unravel the effect of metal and organic pollutants on dinoflagellates, an important component of the phytoplankton community, and to discern the influence of associated "phycosphere" bacteria on the response of dinoflagellates to pollutants.
(© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
Externí odkaz: