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Articles containing the keyword 'metabolism'

Category : Article

article id 5356, category Article
Pekka Lähdesmäki, Pekka Pietiläinen. (1988). Seasonal variation in the nitrogen metabolism of young Scots pine. Silva Fennica vol. 22 no. 3 article id 5356. https://doi.org/10.14214/sf.a15513
Keywords: Pinus sylvestris; winter dormancy; amino acids; arginine; proteins; nitrate reductase; γ-glutamyltransferase; pine buds and needles; nitrogen metabolism
Abstract | View details | Full text in PDF | Author Info

Seasonal changed in total nitrogen, protein, amino acid, ammonia, nitrate and nitrite concentrations, and nitrate reductase and γ-glutamyltransferase activities in the needles, buds and shoots of young Scots pine (Pinus sylvestris L.) were studied. A relationship between the variation in the nitrogen metabolism and both winter dormancy and its breaking was proposed. Pine tissues stored soluble nitrogen over the winter largely in the form of arginine which, in addition to a high nitrogen content, can neutralize acidic cytoplasmic constituents such as nitrates and nitrites. Specific nitrate reductase and γ-glutamyltransferase activities were highest in late summer or autumn, and is apparently connected to the mobilization of nitrogen reserves for the winter.

The PDF includes an abstract in Finnish.

  • Lähdesmäki, E-mail: pl@mm.unknown (email)
  • Pietiläinen, E-mail: pp@mm.unknown
article id 4893, category Article
Tauno Kallio, Jukka Selander, Antti Uusi-Rauva. (1974). Fomes annosuksen (Fr.) Cooke kantaitiöiden merkitseminen radioaktiivisilla isotoopeilla 3H, 32P, 125I. Silva Fennica vol. 8 no. 1 article id 4893. https://doi.org/10.14214/sf.a14737
English title: Labelling of Fomes annosus basidiospores with radioactive isotopes 3H, 33P and 125I.
Original keywords: kuusi; juurikääpä; kantaitiöt; itiöemä; sienen metabolia
English keywords: Heterobasidion annosum; root rot; Fomes annosus; sporophores; basidiospore; metabolism
Abstract | View details | Full text in PDF | Author Info

The purpose of the study was to find out whether Fomes annosus (now Heterobasidion annosum) growing in a Norway spruce (Picea abies (L.) H. Karst.) stump can, with its mycelium, take up the radioactive isotopes 3H, 33P and 125I in the heading, and whether it transfers them via the sporophores in situ to its basidiospores. Wood material in close proximity to active sporophores was injected with radioactive isotopes. All isotopes could be verified from the basidiospores. The production of viable basidiospores by sporophore was reduced by the isotope injections. This latter result may be of importance e.g. in meteorology for observation of the movements of air masses.

The PDF includes a summary in English.

  • Kallio, E-mail: tk@mm.unknown (email)
  • Selander, E-mail: js@mm.unknown
  • Uusi-Rauva, E-mail: au@mm.unknown

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