Stratifying, partially redrying and storing Douglas-fir seeds : effects on growth and physiology during germination
نویسندگان
چکیده
منابع مشابه
Activation of Germination in Douglas Fir Seed by Hydrogen Peroxide.
The stimulation of the photooxidase by ammonium sulfate and potassium phosphate was examined in some detail. Maximum stimulation was as much as 10-fold in 1.3 to 1.5 M (NH4)9SO4 in the presence of 0.3 mM KCN. Part of this stimulatory effect was due to the cyanide. Phosphate and citrate also stimulated strongly, and salts of monovalent anions had smaller effects. Many typical inhibitors of photo...
متن کاملEffects of mountain beaver management and thinning on 15-year-old Douglas fir growth and survival.
We examined 4-year growth of 15-year-old damaged and undamaged Douglas fir (Pseudotsuga menzesii) after integrating temporary population reductions of mountain beaver (Aplodontia rufa) with thinning in a pre-commercial hand-planted plantation in western Washington. Five treatment combinations were considered: (1) trapping mountain beavers in an unthinned area, (2) trapping before thinning to 65...
متن کاملEffects of megagametophyte removal on DNA yield and early seedling growth in coastal Douglas-fir
Stratified seeds of coastal Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) were germinated, sown in soil, and seed coats and megagametophytes were removed at various stages of early seedling development. Yield and quality of DNA extracted from the megagametophytes were related to several morphological traits of the seedlings after 2 months of growth in a controlled environmen...
متن کاملEffects of live crown on vertical patterns of wood density and growth in Douglas-fir
It would be valuable economically to know what are the biological triggers for formation of mature wood (currently of high value) and (or) what maintains production of juvenile wood (currently of low value), to develop silvicultural regimes that control the relative production of the two types of wood. Foresters commonly assume the bole of softwoods produces juvenile wood within the crown and m...
متن کاملDouglas-Fir Growth under Future Climate
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ژورنال
عنوان ژورنال: Annales des Sciences Forestières
سال: 1985
ISSN: 0003-4312
DOI: 10.1051/forest:19850402