Molecular Biology of Larval Osmoregulation

摘要: Halophilic organisms have evolved several diverse strategies in solving problems of osmotic stress. For example, animal and plant halophiles find life can be sustained large measure by controlling the intracellular pressure with small molecules. These are referred to as osmoconformers. Somero colleagues cogently argued that halophilic osmoconformers utilize a family organic solutes, termed osmolytes, passively regulate pressures[1]. This system is believed more flexible adaptive mechanism simpler genetic controls than those proposed for “primitive” osmoregulators dependent upon control mechanics cell volume[2]. Similarly, microbes employ ions simple osmolytes water fluxes across bacterial wall. bacteria membrane mechanisms pump into high concentrations K+ ions. Again, it requires and, together selection cytosolic proteins having higher proportion acidic amino acids, provides vital subcellular organelles (ribosomes) enzyme complexes functional at salt excess 1 molar. It obvious evolution through natural has taken long period time this ascertain which many changes DNA sequences needed code these was best coping widely fluctuating environmental salinites.