Summary:
Published in Ann. Rech. For. 31: 26-39
Carbohydrate concentrations of soluble sugars (glucose, fructose, sucrose, raffinose, trehalose), polyols (pinitol, mannitol, sequoyitol, inositol), organic acids (shikimic and quinic acids) and unknown sugars were determined on containerized black spruce Picea mariana [Mill.] B.S.P.) seedlings of three différent types (smal, medium, and large), planted in raised sand beds maintained under wet, moderately dry or dry soil moisture conditions, three occasions during the growing season. Concurrent measurements of net photosynthesis (Pn) and of relative growth rates (RGR) had shown specific differences and similarities among the three seedling types. Of all the carbohydrates measured, only quinic acid showed patterns of variation that paralleled those observed for Pn and RGR. Large concentrations of quinic acid were associated with seedling types with the highest measured Pn and RGR. No such similarity was observed with any of the other carbohydrates measured. Results suggest that quinic acid concentrations reflect current growth in the seedlings, and are largely independent of interconversions and storage processes that prevent the use of other major carbohydrates as indicators of seedling quality.
Sector(s):
Forests
Catégorie(s):
Scientific Article
Theme(s):
Forestry Research, Forests, Seeds and Forest Seedlings Production
Departmental author(s):
Author(s):
LAMHAMEDI, Mohammed S., Pierre Y. BERNIER and Gil LAMBANY
Year of publication:
1998
How to get the publication:
Keyword(s):
carbohydrates, Picea mariana, black spruce, seedling type, water stress, seeds and forest seedlings production, production de semences et de plants, production de plants, épinette noire, hydrates de carbone, type semis, stress hydrique