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Information × Registration Number 0223U001842, 0122U002190 , R & D reports Title Investigation of gravisensitivity and gravitropic reactions in space flight as an adaptive factor in plant ontogenesis popup.stage_title Head Lobachevska Oksana V., к.б.н. Registration Date 03-02-2023 Organization Institute of Carpathian Ecology of the National Academy of Sciences of Ukraine popup.description2  The content of orthophosphates (Pi) and the activity of phosphatases in the protonemata of Ceratodon purpureus (Hedw.) Brid. has been established. It was showed that phosphatases are localized in the apices of protonema apical cells, in cell walls and growing parts of young leaves. The metabolism of Pi depends on the activity of phosphatases, which catalyze the hydrolysis of phosphates and promote to the synthesis of phosphorus from organic compounds, ensuring its supply to cells. Morpho-physiological reactions of mosses controlled by phytohormones, which have a specific effect at different stages of ontogenesis and depended on gravity. In conditions of low level of phosphates, phytohormones affect the growth rate of the moss protonema, the intensity of cell branching, as well as the gravity-dependent phenotype of the protonema turf, which increases the ability of plants to obtain phosphorus from organic phosphates. The regulatory role of phytohormones in gravitropism is controlled by gravi-dependent transport of Ca2+ and entry↔exit of Ca2+ into the cell, which acts as a polarizing factor of auxin transporters, apical growth and apical dominance in mosses. Ca2+-ATPase activity is a functional indicator of changes in calcium transport. It was determined that ATPase activity correlates with the gravisensitivity of the Bryum caespiticium Hedw. protonema, initiates an increase in the concentration of cytosolic Ca2+ ions and faster transduction of the gravitational signal in the growth bending. Product Description popup.authors Kit Nadija Andrilivna Kyyak Natalia Yaroslavivna Lobachevska Oksana Vasylivna popup.nrat_date 2023-02-03 Close