TY JOUR TI CONTENT OF PHOTOSYNTHETIC PIGMENTS IN ONTOGENESIS OF WILD AND CULTURAL PEA KW pea KW wild accession KW photosynthesis KW chlorophyll KW carotenoids KW ontogenesis KW bud formation KW seed filling JO Vestnik of Kazan State Agrarian University AU Bobkov, S.V. AU Bychkov, I.A. PY 2021 IS 15 PB Kazan state agrarian University