Morphological, physical and physiological changes during maturation and ripening of ash (Fraxinus excelsior L.) seeds

• Autorzy: Farcas C
• Języki publikacji: EN

Abstrakty

EN

The establishment of certain morphological, physical and physiological criteria was considered and this might allow us to determine more precisely the maturation degree as well as the optimum harvest and sowing period of seeds. The criteria for assessing the maturation degree of seeds presented earlier (the completely formed embryo, the prominent endosperm with a normal consistency) can now be completed with a new criterion, namely the one referring to the slight tendency of the seesds tegument to get yellow. This is due to the fact that the seed completes its growing sooner than the pericarp. The fact was proved both by the greater decrease the fresh mass of the pericarp than that of the seed and by the greater decrease of the moisture content of the seed than that of the pericarp during the four examined ripening phases.

Słowa kluczowe

EN

physical change; Fraxinus excelsior; morphological change; physiological change; samara; genotype; ripening; maturation; embryo; ash; pericarp; seed

• Wydawca: -
• Czasopismo: Dendrobiology
• Rocznik: 2002
• Tom: 47 Supplement
• Opis fizyczny: p.55-60,fig.,ref.

Twórcy

autor

Farcas C

• The Research and Forest Management Institute of Brasov, Brasov, Romania

Bibliografia

• Giurgiu V. 1972. Methods of the mathematical statistics applied in forestry, Ceres Publishing House, 565p.
• Ocskay S., Topor D., Haring P., Grobnic G., Sparchez Z., Biliboaca V., Marian A. 1954. Guidance concerning the establishment of the right period for harvesting and sowing ash tree seed (Fraxinus excelsior L.), sycamore maple (Acer pseudoplatanus L.) and common maple (Acer campestre L.). Technical guidance, Agro-Silvica Publishing House, Bucuresti no.66, the 3rd series, ICES, 55p.