TY JOUR TI Cryopreservation of callus cells of grain crops in electric freezer KW wheat callus KW barley callus KW apple pectin KW glycerol KW cell membrane integrity KW genotype KW cultivation JO Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences AU Sergushkina, M.I. AU Shuplecova, O.N. AU Polezhaeva, T.V. AU Zayceva, O.O. AU Hudyakov, A.N. AU Solomina, O.N. PY 2026 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"