title: Photosynthetic activity of Polytrichum commune Hedw. (Polytrichacaee, Bryophyta) in the Khibiny Mountains
abstract: This paper presents data on the content of plastid pigments, the photosynthetic intensity and the assimilation number in Polytrichum commune Hedw. shoots of different ages in the Khibiny forest belt (PABGI, 67°38׳48״N, 33°38׳51״E) are presented. The concentration of chlorophylls changes seasonally: in this year’s shoots — gradually increases, reaching the highest value by fall; in the last year’s shoots — increases by the middle of the active vegetation period and does not change until the onset
journal: Transaction Kola Science Centre