Tapio Lehtiniemi 
Männyn ja kuusen siementen gammasäteilyherkkyyteen vaikuttavista tekijöistä.
Lehtiniemi T. (1977). Männyn ja kuusen siementen gammasäteilyherkkyyteen vaikuttavista tekijöistä. Silva Fennica vol. 11 no. 1 article id 4963. https://doi.org/10.14214/sf.a14814
English title: Factors affecting gamma-irradiation sensitivity of Scots pine and Norway spruceAbstract
This study, comprising three experiments, aims to determine the effect of the geographical origin of Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) H. Karst.) seeds, and the duration of the time lag between the moisture treatment and subsequent irradiation on the gamma-irradiation sensitivity of seeds.
The studies showed that the greater the irradiation dose seeds were subjected to the slower the rate of germination. In general, small radiation doses (250–1,000 rad) had a stimulating effect and the final germination percentage (36–40 days) increased. However, when the level was further increased, the germination percentage decreased. Air-dry and moistened seeds withstood irradiation better than others. In a study with moistened seeds from different geographical sources, pine and spruce seeds from Northern Finland were less able to withstand irradiation than those originating from the south.
The PDF includes a summary in English.
Original keywords
kuusi;
mänty;
alkuperä;
itäminen;
siemenet;
säteilytys
English keywords
Pinus sylvestris;
Norway spruce;
Picea abies;
germination;
Scots pine;
progeny;
seeds;
radiation
Published in 1977
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