TAILIEUCHUNG - Báo cáo khoa học: " Sécheresse édaphique et concentrations quelques solutés organiques des tissus foliaire et racinaire de trois espèces de conifères : Cedrus atlantica Manetti, Pseudotsuga macrocarpa (Torr) Mayr, Pseudotsuga menziesii (Mirb.) Franco"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: " Sécheresse édaphique et concentrations quelques solutés organiques des tissus foliaire et racinaire de trois espèces de conifères : Cedrus atlantica Manetti, Pseudotsuga macrocarpa (Torr) Mayr, Pseudotsuga menziesii (Mirb.) Franco. | Ann. Sci. For. 1988 45 4 311-322 Sécheresse édaphique et concentrations en quelques solutes organiques des tissus foliaire et racinaire de trois espèces de coniferes Cedrus atlantica Manetti Pseudotsuga macrocarpa Torr Mayr Pseudotsuga menziesii Mirb. Franco Ph. GRIEU G. AUSSENAC F. LARHER ỈNRA Station de Sylviculture et de Production Centre de Recherches de Nancy Champenoux F 54280 Seichamps Laboratoire de Biologie végétale Campus de Beaulieu Université de Rennes I F 35042 Rennes Cedex Summary Effect of soil drought on concentrations of organic solutes in needles and roots of three coniferous species Cedrus atlantica Manetti Pseudotsuga macrocarpa Torr Mayr. Pseudotsuga menziesii Mirb. Franco . The authors describe variations in concentrations of some organic solutes for three conifers. Results were obtained from two experiences one in the field testing 9 species and various provenances of douglas fir and a test under controlled conditions for the 3 following species Pseudotsuga macrocarpa Pseudotsuga menziesii Cedrus atlantica. Stress level is expressed as predawn xylem water potential the concentrations of the following organic soluted were measured on each foliar or root sample glucids polyols soluble amino acids and proline. Solutes concentrations vary between species for a same water stress level rates of changes in concentrations for different water stresses levels also differ from one specie to another. For douglas fir amounts of soluble sugars are increasing along with water stresses while no specific trends were observed for Cedrus atlantica. Foliar extractions of polyols were similar not withstanding the stress level applied however significant differences in roots concentrations of polyols are observed between the three species. For douglas fir submitted to a predawn xylem water potential below - MPa there is a strong increase in free amino acids and proline contents. Amounts of amino acids and proline extracted from roots of all species and needles

• Báo cáo khoa học
• Báo cáo lâm nghiệp hay
• cách trình bày báo cáo
• báo cáo lâm nghiệp
• công trình nghiên cứu lâm nghiệp
• tài liệu về lâm nghiệp