Patterns of on-shoot positioning of seed cones in relation to shoot length and position in the crowns of young Picea mariana Export

@article{citeulike:2628373, abstract = {Patterns of distribution of seed cones along the length and around the circumference of shoots were determined for young black spruce [Picea mariana (Mill.) B.S.P.] trees aged 9-17 years. Seed cone production averaged 5, 30, 62, 95, and 112 per tree of ages 9, 11, 13, 15, and 17 years, respectively. Cone distribution was restricted to distal and medial 1-year-old branches at age 9 and spread to distal 3-year-old branches by age 17. Sequentially, shoots of 0-25, 26-100, 101-250, 251-325, and 326-375 mm bore more cones in terminal, distal, medial, proximal, and basal positions along shoots, respectively. The uppermost and longest distal 1-year-old shoots bore most of their cones proximally and medially. On the shortest and innermost proximal order 2 shoots, cones were often terminal. The percentages of cones borne on upper, lower, and each of the two side surfaces of shoots were 31, 22, and 21, respectively, and 5\% of the cones were terminal. Cones on lower surfaces were most common on the longest shoots near the apex of trees. Cones on upper surfaces became prevalent downward and outward in the crown. On-shoot positioning therefore varied in a predictable manner with shoot length, and thus with pattern of shoot-length distribution in the crown. {\copyright} 1993 Springer-Verlag.}, address = {Department of Forest Resources, University of New Brunswick, Bag Service No. 44555, Fredericton, New Brunswick, E3B 6C2, Canada}, author = {Caron, G. E. and Powell, G. R.}, citeulike-article-id = {2628373}, citeulike-linkout-0 = {http://dx.doi.org/10.1007/BF00199620}, citeulike-linkout-1 = {http://www.scopus.com/record/display.url?view=extended&origin=resultslist&eid=2-s2.0-0008150058}, doi = {10.1007/BF00199620}, journal = {Trees}, keywords = {cone, conifer, shoot, spruce}, number = {3}, pages = {182--188}, posted-at = {2008-04-04 03:48:33}, priority = {2}, publisher = {Springer-Verlag}, title = {Patterns of on-shoot positioning of seed cones in relation to shoot length and position in the crowns of young Picea mariana}, url = {http://dx.doi.org/10.1007/BF00199620}, volume = {7}, year = {1993} }

TY - JOUR ID - citeulike:2628373 L3 - citeulike-article-id:2628373 N2 - Patterns of distribution of seed cones along the length and around the circumference of shoots were determined for young black spruce [Picea mariana (Mill.) B.S.P.] trees aged 9-17 years. Seed cone production averaged 5, 30, 62, 95, and 112 per tree of ages 9, 11, 13, 15, and 17 years, respectively. Cone distribution was restricted to distal and medial 1-year-old branches at age 9 and spread to distal 3-year-old branches by age 17. Sequentially, shoots of 0-25, 26-100, 101-250, 251-325, and 326-375 mm bore more cones in terminal, distal, medial, proximal, and basal positions along shoots, respectively. The uppermost and longest distal 1-year-old shoots bore most of their cones proximally and medially. On the shortest and innermost proximal order 2 shoots, cones were often terminal. The percentages of cones borne on upper, lower, and each of the two side surfaces of shoots were 31, 22, and 21, respectively, and 5% of the cones were terminal. Cones on lower surfaces were most common on the longest shoots near the apex of trees. Cones on upper surfaces became prevalent downward and outward in the crown. On-shoot positioning therefore varied in a predictable manner with shoot length, and thus with pattern of shoot-length distribution in the crown. © 1993 Springer-Verlag. IS - 3 JF - Trees AD - Department of Forest Resources, University of New Brunswick, Bag Service No. 44555, Fredericton, New Brunswick, E3B 6C2, Canada EP - 188 TI - Patterns of on-shoot positioning of seed cones in relation to shoot length and position in the crowns of young Picea mariana PB - Springer-Verlag VL - 7 SP - 182 KW - cone KW - conifer KW - shoot KW - spruce AU - Caron, GE AU - Powell, GR PY - 1993/// UR - http://dx.doi.org/10.1007/BF00199620 ER -