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A symbiosis island is a genomic island that confers upon the bacterium carrying it the ability to form a mutualistic relationship with a eukaryotic host. The symbiosis island of Mesorhizobium loti strain R7A (ICEMlSymR7A) is a 501.8-kb chromosomally integrated element that is able to excise and transfer by conjugation to nonsymbiotic mesorhizobia in the environment. The recipients are converted to symbionts able to nodulate and fix nitrogen with Lotus species. ICEMlSymR7A is a member of an emerging class of acquired genetic elements termed “integrative and conjugative elements” (ICEs) that contribute to the diversification and adaptation of bacteria to environmental niches. A regulatory cascade involving bacterial cell–cell communication (quorum sensing), protein antiactivation and programmed ribosomal frameshifting control the process of ICEMlSymR7A excision from the chromosome and transfer to non-symbiotic bacteria.
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The Indigenous history and colonial politics of Torres Strait: contesting culture and resources from 1867 to 1990Pitt, George Henry (2005)The aim of my study is to comprehend why there is a significant gap in the economic development of Torres Strait. It questions why it is that Torres Strait Islanders as a whole remain largely economically unproductive in ...
Freshwater Discharge to Salt Lake and Its Implications for Freshwater Management at Rottnest Island, Western AustraliaAnwar, Faisal; Wawn, P. (2013)Rottnest Island (total area 2000 ha) is located 18 km off the coast of Western Australia and10% of its area is made up by salt lakes. The main freshwater supply at the island comes from two shallow unconfined aquifers. ...
Gillespie, T.; Keppel, Gunnar; Pau, S.; Price, J.; Jaffre, T.; O'Neill, K. (2013)Aim: We examine variation in woody plant species richness and endemism within tropical dry forest on oceanic islands and determine what climatic and biogeographic metrics best explain native species richness and endemism ...