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Articles containing the keyword 'seed maturation'

Category : Article

article id 7648, category Article
Markku Nygren. (1987). Germination characteristics of autumn collected Pinus sylvestris seeds. Acta Forestalia Fennica no. 201 article id 7648. https://doi.org/10.14214/aff.7648
Keywords: Pinus sylvestris; Scots pine; seed maturation; seed germination; seed dormancy; chilling requirement
Abstract | View details | Full text in PDF | Author Info

Germination tests in varying photoperiod- and temperature-regimes showed that for early autumn collections, germination of Scots pine (Pinus sylvestris L.) seeds is delayed, especially at low incubation temperature (+10°C) and in darkness. The presence of light during germination (8- or 24-hour photoperiod) or high incubation temperature (+20°C) enhanced germination. As autumn proceeded, a greater proportion of seed were able of germinate in darkness and also in low temperature regime. This result was consistent in both populations studied – in seeds from natural stand (Hyytiälä, Southern Finland) and in seeds from the Hyytiälä clone archive trees, growing in the same site.

An attempt was made to relate the development of germinability during autumn to previously accumulated chilling unit (optimum temperature +3.5°C) sum. Germination percent variation in subsequent cone-collection could not, however, be explained with accumulated chilling.

The PDF includes a summary in Finnish.

  • Nygren, E-mail: mn@mm.unknown (email)

Category : Research note

article id 609, category Research note
Aleksei Fedorkov. (2001). Climatic adaptation of seed maturity in Scots pine and Norway spruce populations. Silva Fennica vol. 35 no. 1 article id 609. https://doi.org/10.14214/sf.609
Keywords: Norway spruce; Scots pine; climatic adaptation; provenance experiment; seed maturation; X-ray method
Abstract | View details | Full text in PDF | Author Info
Seed maturation of Scots pine and Norway spruce in a provenance experiment at Kortkeros (northern Russia) was examined by the X-ray method. Logarithmic relationships were found between seed anatomy development and long-term average thermal sum. Seed development in the northern populations of Scots pine and Norway spruce was a little faster than in the southern ones.
  • Fedorkov, Russian Academy of Sciences, Komi Science Centre, Institute of Biology, Kommunisticheskya St., 28, 167610 Syktyvkar, Russia E-mail: fedorkov@ib.komisc.ru (email)

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