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胡杨异形叶性状与其个体发育的关系

王文娟 吕慧 钟悦鸣 陈利俊 李景文 马青

王文娟, 吕慧, 钟悦鸣, 陈利俊, 李景文, 马青. 胡杨异形叶性状与其个体发育的关系[J]. 北京林业大学学报, 2019, 41(2): 62-69. doi: 10.13332/j.1000-1522.20180364
引用本文: 王文娟, 吕慧, 钟悦鸣, 陈利俊, 李景文, 马青. 胡杨异形叶性状与其个体发育的关系[J]. 北京林业大学学报, 2019, 41(2): 62-69. doi: 10.13332/j.1000-1522.20180364
Wang Wenjuan, Lü Hui, Zhong Yueming, Chen Lijun, Li Jingwen, Ma Qing. Relationship between heteromorphic leaf traits of Populus euphratica and its individual development[J]. Journal of Beijing Forestry University, 2019, 41(2): 62-69. doi: 10.13332/j.1000-1522.20180364
Citation: Wang Wenjuan, Lü Hui, Zhong Yueming, Chen Lijun, Li Jingwen, Ma Qing. Relationship between heteromorphic leaf traits of Populus euphratica and its individual development[J]. Journal of Beijing Forestry University, 2019, 41(2): 62-69. doi: 10.13332/j.1000-1522.20180364

胡杨异形叶性状与其个体发育的关系

doi: 10.13332/j.1000-1522.20180364
基金项目: 

国家自然科学基金项目 31570610

详细信息
    作者简介:

    王文娟,博士生。主要研究方向:生物多样性和恢复生态学。Email:wangwj0618@163.com  地址:100083 北京市海淀区清华东路35号北京林业大学林学院

    责任作者:

    李景文,博士,教授。主要研究方向:生物多样性。Email:lijingwen@bjfu.edu.cn  地址:同上。

  • 中图分类号: S718.43;S792.119

Relationship between heteromorphic leaf traits of Populus euphratica and its individual development

  • 摘要: 目的叶片是植物适应环境的重要器官,叶片结构性状的改变影响植物光合作用等生理过程,探讨胡杨叶形变化规律及其影响因素对理解其适应特性具有重要意义。方法为明确胡杨异形叶结构性状特征与其个体发育之间的关系,在额济纳人工胡杨林内调查不同树龄、繁殖期与非繁殖期胡杨树冠下层叶片的长与宽以分析其叶形的变化规律。结果胡杨异形叶形成是一个渐变的过程,随着树龄增加,胡杨叶长减小,叶宽增加,叶长宽比减小;树龄对叶片长、宽和长宽比变异的解释率分别为53.1%、38.6%和66.1%。繁殖期对胡杨叶形变化具有显著影响,6年生胡杨繁殖期叶长和叶长宽比显著小于非繁殖期叶片,而叶宽显著大于非繁殖期叶片。非繁殖期的胡杨叶形则随树龄增加由条形叶向卵形叶逐渐转变。胸径与胡杨叶片形态特征显著相关,随着胸径增大,胡杨叶长与叶长宽比减小,叶宽增大;在一元回归分析中,胸径对胡杨叶片形态特征的解释率均大于0.5(R2>0.5,P < 0.000 1),而在多元回归中,胸径单独的解释率为8.6%(叶长)、13.1%(叶宽)、3.4%(叶长宽比);此外,胸径与树龄对胡杨叶片结构性状特征具有显著的交互影响。结论胡杨异形叶的发生与其个体生长发育之间具有密切关系,随着树木的生长,胡杨叶形由条形叶向卵形、阔卵形叶转变以适应干旱高温的环境;此外,繁殖期加速胡杨叶形的转变,可能是胡杨应对繁殖期能量需求的适应性策略。

     

  • 图  1  不同树龄繁殖期与非繁殖期胡杨叶宽(a)、叶长(b)和叶长宽比(c)的差异

    白色为未进入繁殖期胡杨,灰色为进入繁殖期胡杨,***表示相同树龄阶段繁殖期与非繁殖期之间差异极显著。

    Figure  1.  Variations of leaf width(a), leaf length(b) and leaf length/leaf width(c) during reproduction and non-reproduction period at different tree ages

    The white bar and grey bar respectively indicate non-reproduction and reproduction period. Differences between the reproduction and non-reproduction period are indicated by “***”.

    图  2  胸径与叶宽(a)、叶长(b)和叶长/叶宽之间的关系

    黑点、灰点和白点分别表示3、6和11年生胡杨。

    Figure  2.  Relationships of diameter at breast height and leaf width, leaf length and leaf length/leaf width

    The black points, grey points and white points represent 3-year-old, 6-year-old and 11-year-old Populus euphratica, respectively.

    表  1  树龄对胡杨叶结构性状的影响

    Table  1.   Effects of tree age on the leaf structure traits of Populus euphratica

    树龄
    Tree age
    叶长
    Leaf length/cm
    叶长范围
    Leaf length range/cm
    叶宽
    Leaf width/cm
    叶宽范围
    Leaf width range/cm
    叶长/叶宽
    Ratio of leaf length to leaf width
    叶长/叶宽范围
    Ratio of leaf length to leaf width range
    3 7.56 a 5.7~10.2 0.96 b 0.6~1.7 9.10 a 4.6~13.3
    6 5.65 b 3.8~7.0 2.22 a 0.9~3.6 3.51 b 1.2~7.8
    11 4.69 c 3.4~6.6 3.00 a 0.9~6.2 1.99 c 0.9~6.0
    注:表中数值为平均值。同列不同小写字母表示不同树龄之间差异显著(P < 0.05)。Notes: data in table are mean values. Different small letters in the same column mean significant differences at P < 0.05 level among different tree ages.
    下载: 导出CSV

    表  2  树龄和繁殖期对胡杨叶结构性状特征影响的双因素方差分析

    Table  2.   Comparisons of leaf structure traits between reproduction and non-reproduction period at different tree ages using two-way analysis of variance

    叶结构性状Leaf structure trait 变异来源Variation source F P
    叶长Leaf length 树龄Tree age 13.785 0.001
    繁殖期Reproduction period 10.554 0.003
    树龄×繁殖期Tree age×reproduction period 2.160 0.150
    叶宽Leaf width 树龄Tree age 7.810 0.008
    繁殖期Reproduction period 4.639 0.038
    树龄×繁殖期Tree age ×reproduction period 14.376 0.001
    叶长/叶宽Leaf length/leaf width 树龄Tree age 14.122 0.001
    繁殖期Reproduction period 20.224 0.000
    树龄×繁殖期Tree age×reproduction period 16.632 0.000
    下载: 导出CSV

    表  3  植物各性状指标间的Pearson相关分析

    Table  3.   Pearson correlation analysis among traits of Populus euphratica

    变量Variable 胸径DBH 树高Tree height 叶长Leaf length 叶宽Leaf width
    树高Tree height 0.890***
    叶长Leaf length -0.692*** -0.713***
    叶宽Leaf width 0.706*** 0.644*** -0.574***
    叶长/叶宽Leaf length/leaf width -0.674*** -0.697*** 0.782*** -0.819***
    注:***表示相关性极显著(P < 0.001)。Note: *** indicates significant correlation between the variables (P < 0.001).
    下载: 导出CSV

    表  4  树龄、繁殖期和胸径对叶长、叶宽和叶长/叶宽的影响

    Table  4.   Effects of tree age, reproduction period and diameter at breast height on leaf length, leaf width and leaf length/leaf width

    项目Item 叶长Leaf length/cm 叶宽Leaf width/cm 叶长/叶宽Leaf length/leaf width
    df 方差百分比
    Percentage of variance/%
    F df 方差百分比
    Percentage of variance/%
    F df 方差百分比
    Percentage of variance/%
    F
    树龄Tree age 2.0 53.1 39.1*** 2.0 38.6 34.7*** 2.0 66.1 200.6***
    繁殖期Reproduction period 1.0 5.1 9.1** 1.0 6.4 38.6***
    胸径DBH 1.0 8.6 12.6*** 1.0 13.1 23.6*** 1.0 3.4 20.5***
    树龄×繁殖期
    Tree age×reproduction period
    1.0 18.7 33.7*** 1.0 6.1 37.2***
    树龄×胸径Tree age×DBH 2.0 8.5 6.3** 2.0 11.0 33.6***
    繁殖期×胸径
    Reproduction period×DBH
    残差Residual 44.0 29.8 44.0 24.5 42.0 7.0
    注:**表示P < 0.01相关性显著,***表示P < 0.001相关性极显著。Notes: means P < 0.01, and *** means P < 0.001.
    下载: 导出CSV
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  • 收稿日期:  2018-11-05
  • 修回日期:  2018-12-25
  • 刊出日期:  2019-02-01

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