The features of morphological and physiological adaptation of the mosses Funaria hygrometrica Hedw. and Brachythecium glareosum (Bruch ex Spruce) Schimp. to periodic drying under controlled conditions are determined. The increase in chlorophyll b and carotenoids content, improving the strength of pigment-protein complexes, indicates their important role in protecting the photosynthetic system under drying conditions. Desiccation tolerance can be induced both by long- and short-term drying, as indicated by increased synthesis of metabolically active substances. It was found that the periodic long-term drying significantly accelerates the recovery of vital functions of moss turfs, probably due to gradual hardening of the plants.

Keywords: tolerance, desiccation, pigment system, osmoprotectors, Funaria hygrometrica, Brachythecium glareosum

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