article id 609, category Research note
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
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.