Abstract

MONTENEGRO RUIZ, LUIS CARLOS  and  MELGAREJO MUNOZ, LUZ MARINA. Variation in Total Sugars and Reductive Sugars in the Moss Pleurozium schreberi (HYLOCOMIACEAE) Under Water Deficit Conditions. Acta biol.Colomb. [online]. 2012, vol.17, n.3, pp.599-610. ISSN 0120-548X.

The structural simplicity of the bryophytes exposed them easily to water stress, forcing them to have physiological and biochemical mechanisms that enable them to survive. This study evaluated the variation of total soluble sugars and reducing sugars in relation to relative water content, in Pleurozium schreberi when faced with low water content in the Páramo de Chingaza (Colombia) and under simulated conditions of water deficit in the laboratory. We found that total sugars increase when the plant is dehydrated and returned to their normal content when re-hydrated moss, this could be interpreted as a possible mechanism of osmotic adjustment and osmoprotection of the cell content and cellular structure. Reducing sugars showed no significant variation, showing that monosaccharides do not have a protective role during dehydration.

Keywords : Moss; osmoprotection; páramo; water stress.

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