DOI: 10.1016/j.jembe.2019.151290
论文题名: Siderophore production by bacteria isolated from mangrove sediments: A microcosm study
作者: Sinha A.K. ; Parli B.V.
刊名: Journal of Experimental Marine Biology and Ecology
ISSN: 220981
出版年: 2020
卷: 524 语种: 英语
英文关键词: Iron
; Mangroves
; Microcosm
; Sediment
; Siderophore
Scopus关键词: bioavailability
; glucose
; iron
; mangrove
; microbial activity
; nitrogen fixation
; sediment chemistry
; siderophore
; Bacteria (microorganisms)
; Enterobacter
; Enterobacter cancerogenus
; Escherichia vulneris
; Pantoea agglomerans
; Rhizophoraceae
英文摘要: Mangroves are one of the most productive ecosystems worldwide covering up to 75% of the coastline in the tropics and subtropics. They support a highly diverse community (marine and terrestrial) and serves as reservoirs of nutrients for coastal and shelf waters. Bacterial diversity in mangroves includes heterotrophs, autotrophs (nitrogen fixation) and pathogens (phytopathogens, marine, and human). All these bacterial groups require sequestration of bioavailable iron, which is largely done by the production of siderophores. In this study, microcosm experiments were conducted to test the effect of incubation conditions (temperature, iron concentration, pH, and carbon source) on growth and siderophore production in four mangrove sediment bacterial isolates- Escherichia vulneris, Enterobacter cancerogenus, Pantoea agglomerans, and Enterobacter bugandensis. Our study showed that all isolates produce more siderophores (30 to 60%) at low iron concentrations (10 nM to 1 μM) during lag-phase and early log-phase of growth. Low temperature suppressed bacterial growth without significantly altering the siderophore production, whereas low pH suppressed both growth and siderophore production in these isolates. Although all isolates could produce siderophores when using different carbon sources, glucose served as an ideal carbon source. The observed changes in growth and siderophore production may be attributed to species-specific physiological traits, changes in bioavailability of iron and/or combination of both. Our results suggest that in a changing global environment, warming of the surrounding waters may not reduce the siderophore production and hence, they will be essential in sustaining bacterial activity in sediments. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159112
Appears in Collections: 气候变化与战略
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作者单位: National Centre for Polar and Ocean Research (NCPOR), Goa, 403804, India
Recommended Citation:
Sinha A.K.,Parli B.V.. Siderophore production by bacteria isolated from mangrove sediments: A microcosm study[J]. Journal of Experimental Marine Biology and Ecology,2020-01-01,524