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''Plagiomnium affine'' (Blandow ex Funck) T. Kop. is a species of thyme-moss found in old-growth boreal forests in North America, Europe and Asia, growing in moist, but not wet, basic to slightly acidic micro-habitats in woodland and in turf. ('Plagio' = oblique, 'Mnium' = genus of thyme-moss) Forming low lawns, stems are usually some 2 cm long, with densely packed leaves, though 10 cm long trailing infertile stems have only sparse leaves, smaller than those on fertile stems. Leaves strongly curled when dry, spreading plane when moist, the basal leaves broadly elliptic to rounded, those at the apex mucronate. Leaf edges of bases decurrent on stem, the upper leaves oblong to lingulate and constricted at base, toothed. 〔(BiotaTaiwanica )〕 The leaf cells are arranged in diagonal rows and are easily discerned with a lens. 〔(British Bryological Society )〕 Experiments to determine the efficacy of cryoprotectants show that the leaf covering is relatively impermeable to sugars, proline, and polyethylene glycols, but that dimethylsulfoxide is readily absorbed. Even so, it was found that frost hardiness is accompanied by a steep rise in cell sucrose concentration. 〔( Oecologia Volume 91, Number 2 (1992) )〕 Cryoprotective compounds may play a major role in the frost tolerance of bryophytes. 〔(''Cryoprotection of Plagiomnium affine induced by various natural and artificial substances'' )〕 ==Synonyms== *''Astrophyllum cuspidatum'' Lindb. *''Bryum aciphyllum'' Voit *''Bryum affine'' (Blandow ex Funck) Brid. *''Mnium affine'' Blandow ex Funck *''Mnium cuspidatum'' Neck. ex Lindb. *''Mnium cuspidatum'' var. ''affine'' (Blandow ex Funck) Sommerf. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Plagiomnium affine」の詳細全文を読む スポンサード リンク
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