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Titre :
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Seed mass growth in two Pinus Sylvestris clones
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Auteurs :
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M. Nygren ;
M. Pulkkinen
|
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Type de document :
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article/chapitre/communication
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Année de publication :
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1994
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ISBN/ISSN/EAN :
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951-96623-5-9
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Format :
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11 p.
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Note générale :
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rés. en angl. et finlandais
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Langues:
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= Anglais
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Catégories :
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Biologie végétale - Génétique
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Mots-clés:
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FINLANDE
;
PINUS SYLVESTRIS
;
CLONE
;
GRAINE
;
CROISSANCE BIOLOGIQUE
;
MATURATION
;
DENSITE
;
HUMIDITE
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Résumé :
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Scots pine seed mass growth during the second year of development was studied. Seeds were collected weekly and bi-weekly in three different years from single clones of southern (61° 15' N, 25° 00' E) and northern (66° 40' N, 24° 50' E) origin but growing in the same clonal archive environment in southern Finland (61° 51' N, 24° 20' E). Seeds of the northern clone reached 90 % of their final dry mass each year from 8 to 17 days earlier than the southern ones ; seed water content at this stage varied between 36 and 55 % (fresh weight basis). Time-course of seed mass growth was adequately described with an asymptotic, non-linear function.
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Source :
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Reports from the foundation for forest tree breeding - Helsinki, vol n°9
|
