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Change of Chemical Reserves in Germinating Douglas-Fir Seed

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Two lots of Pseudotsuga menziesii (Mirb.) Franco seed from different elevations and with different seed weights were stratified and germinated. The fresh weight, dry weight, nitrogen contents, various lipides (free fatty acids, nonsaponifiables, and saponifiables), starch, reducing sugars and oligosaccharides were determined in original seed, stratified seed and germinating seed with seedlings of various sizes during a 22-day growth period. A marked reduction of saponifiable lipides observed in germinating seed after stratification was accompanied by an increase in sugars and starch. With germination, nitrogen content per individual seed remained constant, while fresh weight increased 3 to 4 fold and dry weight decreased 5 to 15%. Some decrease in oligosaccharides and free fatty acids, and a slight increase in reducing sugars and total extractable lipides was found in stratified seed. The general pattern of utilization for lipide and carbohydrate reserves was similar in both lots during germination, except that the heavier seed from a lower elevation germinated faster and utilized reserves at a higher rate.

Document Type: Journal Article

Affiliations: Seed Research Laboratory, Dept. of Farm Crops, Oregon State Univ., Corvallis

Publication date: 1963-06-01

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  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
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    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
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