阔叶红松林3种阔叶树种柄叶性状变异与相关性
- 东北林业大学生态研究中心, 森林生态系统可持续经营教育部重点实验室, 东北亚生物多样性研究中心, 哈尔滨 150040
收稿日期: 2022-01-27
录用日期: 2022-03-29
网络出版日期: 2022-04-08
基金资助
国家自然科学基金(31971636);国家自然科学基金(32071533);中央高校基本科研业务费专项资金(2572022DS13)
Variations and correlations of lamina and petiole traits of three broadleaved species in a broadleaved Korean pine forest
- Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, Northeast Asia Biodiversity Research Center, Northeast Forestry University, Harbin 150040, China
Received date: 2022-01-27
Accepted date: 2022-03-29
Online published: 2022-04-08
Supported by
National Natural Science Foundation of China(31971636);National Natural Science Foundation of China(32071533);Fundamental Research Funds for the Central Universities(2572022DS13)
摘要
叶包括叶片和叶柄, 二者在结构和功能上密切相关, 探究叶片性状和叶柄性状变异及性状间相关关系的影响因素对了解植物叶水平上的生物量分配策略具有重要意义。该研究以阔叶红松(Pinus koraiensis)林内3种主要阔叶树种白桦(Betula platyphylla)、紫椴(Tilia amurensis)、五角枫(Acer pictum subsp. mono)为研究对象, 每个树种选取小树(胸径: 1-6 cm)、中等树(胸径: 15-20 cm)、大树(胸径: 35-45 cm)各10株样树; 另针对大树, 考虑取样冠层位置对其结果的影响。通过测定叶片面积、叶片干质量、叶柄长和叶柄干质量, 主要探讨树种、植株大小和冠层位置(大树)对叶片性状和叶柄性状变异及其性状间相关性的影响。结果显示: (1)树种和植株大小对4个性状均存在显著影响, 3个树种小树的叶柄长和叶柄干质量显著小于大树, 紫椴和五角枫小树的叶片干质量也显著小于大树, 而白桦和紫椴小树的叶片面积显著大于大树; 对于大树, 冠层位置对4个性状变异的影响因树种而异。(2)叶片性状和叶柄性状表现为显著的异速生长关系, 且3个树种的回归斜率为紫椴>白桦>五角枫; 在白桦不同植株大小间的回归斜率为小树>大树>中等树, 而紫椴和五角枫大树的回归斜率最大; 对于大树, 在不同冠层位置叶片性状和叶柄性状间的相关关系存在共同斜率。研究结果表明叶片性状和叶柄性状的变异及其相关关系受树种和植株大小的显著影响, 冠层位置对大树柄叶性状变异及相关关系的影响则相对较小。
本文引用格式
李露, 金光泽, 刘志理 . 阔叶红松林3种阔叶树种柄叶性状变异与相关性[J]. 植物生态学报, 2022 , 46(6) : 687 -699 . DOI: 10.17521/cjpe.2022.0045
Abstract
Aims The lamina and petiole of a leaf are closely related in structure and function, of which the variation and correlation are important for understanding the strategies of biomass allocation at the leaf level.
Methods In this study, we sampled Betula platyphylla, Tilia amurensisand Acer pictum subsp. mono in a broadleaved Korean pine (Pinus koraiensis) forest in Northeast China and explored effects of species, tree size and canopy position on variations in and correlations between lamina and petiole traits. For each species, we selected 10 trees for small (diameter at breast height (DBH): 1-6 cm), intermediate (DBH: 15-20 cm), and large sizes (DBH: 35-45 cm), respectively. For the large-sized trees, we took canopy position into account. We measured lamina area (LA), lamina dry mass (LDM), petiole length (PL), and petiole dry mass (PDM).
Important findings (1) The four traits significantly varied with species and tree size. PL and PDM of the small trees were significantly lower than those of large trees for the three species. LDM of the small trees was significantly less than that of the large trees for T. amurensis and A. pictum subsp. mono, while LA of the small trees was significantly greater than that of the large trees for B. platyphyllaand T. amurensis. For the large trees, the effect of canopy position on the variations in the four traits was species-depended. (2) There was a significant allometric scaling relationship between the lamina and petiole traits for all the three species. The regression slopes ranked as T. amurensis > B. platyphylla> A. pictum subsp. mono; the slopes for B. platyphyllaranked as small size > large size > intermediate size, while the slopes for the large-sized trees were the greatest among different tree sizes for T. amurensisand A. pictum subsp. mono. Canopy position had no significant effect on the regression slope for the large-sized trees. These results showed that species and tree size significantly influenced the variations in and correlations between the lamina and petiole traits for the three temperate tree species, while canopy position had little effect for the large-sized trees.
Key words： lamina trait; petiole trait; tree size; canopy position; allometric scaling
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