植物生态学报 ›› 2022, Vol. 46 ›› Issue (6): 712-721.DOI: 10.17521/cjpe.2021.0421

• 研究论文 • 上一篇    下一篇

着生位置对水曲柳小叶性状变异及性状间相关性的影响

王广亚1, 陈柄华1(), 黄雨晨1, 金光泽2, 刘志理2,*()   

  1. 1东北林业大学林学院, 哈尔滨 150040
    2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:2021-11-18 接受日期:2022-01-17 出版日期:2022-06-20 发布日期:2022-06-09
  • 通讯作者: 刘志理
  • 作者简介:*(liuzl2093@126.com)
  • 基金资助:
    国家自然科学基金(31971636);中央高校基本科研业务费专项资金项目(2572022DS11);黑龙江省级大学生创新训练项目(202010225086)

Effects of growing position on leaflet trait variations and its correlations in Fraxinus mandshurica

WANG Guang-Ya1, CHEN Bing-Hua1(), HUANG Yu-Chen1, JIN Guang-Ze2, LIU Zhi-Li2,*()   

  1. 1School of Forestry, Northeast Forestry University, Harbin 150040, China
    2Center 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:2021-11-18 Accepted:2022-01-17 Online:2022-06-20 Published:2022-06-09
  • Contact: LIU Zhi-Li
  • Supported by:
    National Natural Science Foundation of China(31971636);Fundamental Research Funds for the Central Universities(2572022DS11);Undergraduate Training Programs for Innovations by Heilongjiang Province(202010225086)

摘要:

复叶植物相比单叶植物更具生长优势, 但复叶内部小叶性状及其相关关系是否受到着生位置影响尚未可知。该研究以东北典型复叶植物水曲柳(Fraxinus mandshurica)为研究对象, 测定复叶内部不同着生位置小叶的叶厚(LT)、叶面积(LA)、叶干物质含量(LDMC)、比叶面积(SLA)、叶氮含量(LNC)和叶磷含量(LPC), 分析上述6种小叶性状及其生长关系在复叶内部的变异, 并分别通过最小显著性差异(LSD)法以及标准化主轴(SMA)法检验着生位置对小叶性状及性状间生长关系是否存在显著影响。结果表明: (1) LT、LA、LDMC和LNC随小叶着生位置级别增加(从复叶顶端至复叶基部)呈减小趋势, 但SLA和LPC呈增大趋势。(2)复叶内部, LNC与SLA间以及LT与LDMC间表现为同速生长关系, LT、SLA、LPC 3个性状与LA间, SLA、LNC、LPC 3个性状与LDMC间以及LPC与LT间均表现为异速生长关系。(3)小叶着生位置对LA与LT、SLA、LPC之间的相关关系存在显著影响, LT、SLA与LA的斜率在三级小叶(复叶中部)附近达到最大值, LT、LPC与LA的斜率绝对值在六级小叶(复叶基部)处达到最小值。整体而言, 复叶内部小叶性状随着生位置存在一定变异规律, 小叶性状间多表现为异速生长关系, 且小叶性状间的生长关系一定程度上受着生位置的调控。

关键词: 复叶植物, 异速生长, 比叶面积, 叶干物质含量, 叶厚, 叶面积, 叶片养分含量

Abstract:

Aims Compound-leaved plants commonly grow better than simple-leaved plants, but it is unknown about how leaflet growing position influences leaflet trait variations and its correlations in compound leaves. Our aim was to address this question with a model tree species Fraxinus mandshurica.

Methods Fraxinus mandshurica, a typical compound-leaved tree in northeastern China, was selected as a focal plant species. We measured leaflet thickness (LT), leaflet area (LA), leaflet dry matter content (LDMC), specific leaflet area (SLA), leaflet nitrogen content (LNC), and leaflet phosphorus content (LPC) across leaflet growing position in the compound leaves of F. mandshurica.We analyzed its leaflet trait variations with leaflet growing position and examined if leaflet growing position significantly affected leaflet traits using the least significant difference (LSD) method. Similarly, we analyzed the relationships among leaflet traits and examined if leaflet growing position significantly affected these relationships using the standardized major axis (SMA) method.

Important findings (1) LT, LA, LDMC and LNC decreased with leaflet growing position (from the tip to the base of a compound leaf), but SLA and LPC increased with leaflet growing position. LT and LA were significantly variable with leaflet growing position. (2) Within a compound leaf, there was an isometric relationship between SLA and LNC or between LDMC and LT. However, LA showed an allometric relationship with LT, SLA and LPC; LDMC show an allometric relationship with SLA, LNC and LPC; LPC showed an allometric relationship with LT. (3) Leaflet growing position had significant effects on the relationships of LA with LT, SLA, and LPC. The greatest slopes between LT and LA and between SLA and LA occurred at the third leaflet growing position (the middle of a compound leaf). The smallest values of absolute slopes between LT and LA and between LPC and LA appeared at the sixth leaflet growing position (the base of a compound leaf). The results suggest that leaflet traits in the compound leaves of F. mandshurica could change with leaflet growing position, and most of trait relationships might be allometric. To a certain extent, the growth relationships among leaflet traits could vary with leaflet growing position.

Key words: compound-leaved plant, allometry, specific leaf area, leaf dry matter content, leaf thickness, leaf area, leaf nutrient content