Parallel analysis of proteins in brown seaweed Sargassum fusiforme responding to hyposalinity stress

In order to eliminate other wild harmful algae, freshwater or lower salinity of seawater is usually employed to the brown alga Sargassum fusiforme for a short period, indicating its tolerance to hyposalinity stress. Osmotic stress is one of the major abiotic stresses for most algae. As most studies were concerning about the hypersalinity stress, physiological mechanisms of tolerance to hyposalinity stress of algae are not fully understood. This study focuses on responses of the brown alga S. fusiforme to short-term (or acute) hyposalinity stress, using comparative physiology approach combining methods of systems biology including proteomics. Then analyzes the typical physiological characteristics related to osmotic stress and overall physiological metabolic networks to investigate the possible tolerance mechanism of S. fusiforme to hyposalinity stress at physiological level. As an important foundation work, analyzing the effect of hyposalinity stress on the survival of S. fusiforme and its mechanism is helpful to explore the tolerance of algae to abiotic stress. In another aspect, it will also provide the necessary theoretical basis for the freshwater pesticide technology.