Shoot, needle, and cambial growth phenology and branch tracheid dimensions in provenances of lodgepole pine
Shoot, needle, and cambial growth phenology and branch tracheid dimensions in provenances of lodgepole pine
复制标题
黑松种源的枝条、针叶和形成层生长物候学和分枝管胞尺寸
DOI：
10.1139/x89-094
复制
发表时间：
1989
影响因子：
2.2
通讯作者：
J. Owens
中科院分区：
文献类型：
--
作者：
C. O'Reilly;J. Owens
研究了扭叶松7个种源一级四轮枝梢和针叶生长的物候期。SSP.宽叶黄杞来自不列颠哥伦比亚省和育空地区，生长在乔治王子，不列颠哥伦比亚省的原产地试验。从相似枝的第1年生长量的中部开始，在横截面上跟踪管胞产生的物候。管胞直径和壁厚在休眠枝的切片中以跨环的增量测量。生长开始日期的种源之间的差异很小或可以忽略不计，虽然早期的相对生长率较高的北方种源。针叶和形成层停止生长的时间在种源间差异很大，而新梢伸长停止生长的时间在种源间差异较小。生长持续时间对最终针叶长度和管胞数量的影响最大。芽长主要受伸长速率的影响。北方种源的导管数量少、直径窄、壁较薄。
Shoot and needle growth phenology was studied in first-order fourth-whorl branches from seven provenances of Pinuscontorta Dougl. ssp. latifolia Engelm. from British Columbia and the Yukon, growing in a provenance trial at Prince George, British Columbia. The phenology of tracheid production was followed in cross sections from the midportion of the 1st-year increment of similar branches. Tracheid diameter and wall thickness were measured at increments across the ring in sections from dormant branches. Differences among provenances in the dates of growth initiation were small or negligible, although early relative growth rates were higher in the northern provenances. The times of cessation differed greatly among provenances for needle and cambial growth, but less for shoot elongation. Duration of growth had the largest effect on final needle length and tracheid numbers. Shoot length was affected largely by rates of elongation. The northern provenances had few, narrow-diameter, relatively thin-walled trache...