Pattern of leaf vein density and climate relationship of Quercus variabilis populations remains unchanged with environmental changes
Pattern of leaf vein density and climate relationship of Quercus variabilis populations remains unchanged with environmental changes
复制标题
栓皮栎种群叶脉密度格局与气候关系随环境变化保持不变
DOI：
10.1007/s00468-011-0624-0
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发表时间：
2012-04
影响因子：
2.3
通讯作者：
Xie, Qiang
中科院分区：
文献类型：
--
作者：
Kang, Hongzhang;Liu, Chunjiang;Wang, Zhe;Yin, Shan;Zhu, Yanhua;Xie, Qiang
植物的叶脉性状部分是植物在长期进化过程中对环境因素适应的结果。然而，关于脉体密度沿气候梯度的变化趋势或这种脉体密度-气候关系模式对气候变化的响应还没有得到普遍的结论。研究了温带-亚热带生物群内10个栓皮栎种群(原位种群)的叶脉密度和其他叶片性状的变异，以及生长在同一花园的7个种群的叶脉密度对环境变化的响应。结果表明，随着纬度的增加，原位种群的次脉密度(≥3级)显著降低(R2=0.44，P=0.04)。园林种群的这种格局保持不变(R2=0.67，P=0.02)。园林种群和原位种群的次脉密度均与原产地的年平均温度(MAT)呈正相关(园林种群的R2=0.66，P=0.03；原位种群的R2=0.37，P=0.06)，但与产地的年平均降水量(MAP)相关性不显著。与MAT和MAP相比，叶脉密度与当年或当年生长季气候变量的相关性显著降低。在园林种群中，小脉密度随单位面积叶干重的增加而显著增加，随叶柄长度和叶长的增加而减小。这些结果表明，叶脉密度在基因上是固定的，因此对生长条件的时间变化没有反应。
The leaf vein traits of plants result partially from adaptations to environmental factors during the long-term evolution. However, no general conclusion on the variation trend of the vein density along a climate gradient or the response of such vein density–climate relationship pattern to climate changes has been made. We examined the variations in leaf vein density and other leaf traits of oriental oak (Quercus variabilis) in 10 in situ populations (in situ populations) across temperate-subtropical biomes and the response of the leaf vein density to environmental changes in 7 populations grown in a common garden (garden populations). The results show that the minor vein density of the in situ populations (≥3rd order) significantly decreased with increasing latitude (r2 = 0.44 and P = 0.04). This pattern remained unchanged for the garden populations (r2 = 0.67 and P = 0.02). The minor vein densities of both the garden and in situ populations were positively correlated to the mean annual temperature (MAT) of the origins (r2 = 0.66 and P = 0.03 for the garden populations; r2 = 0.37 and P = 0.06 for the in situ populations), but their correlation to the mean annual precipitation (MAP) of the origins was not significant. Compared with the MAT and MAP, the vein density displayed a significantly lower correlation to climate variables in the current year or the current-year growing seasons. For the garden populations, the minor vein density significantly increased with leaf dry mass per area and decreased with petiole length and leaf length. These results imply that leaf vein density is genotypically fixed and is therefore not responsive to temporal changes in the growing conditions.
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影响因子：
64.8
作者：
R. Knight
通讯作者：
R. Knight
影响因子：
4.2
作者：
GUPTA, B
通讯作者：
GUPTA, B
影响因子：
3.7
作者：
Boyce, C. K.
通讯作者：
Boyce, C. K.
DOI：
--
发表时间：
1978
期刊：
--
影响因子：
--
作者：
G. Russell;J. Grace
通讯作者：
G. Russell;J. Grace
DOI：
10.1098/rspb.2008.1919
发表时间：
2009-05-22
影响因子：
4.7
作者：
Boyce, C. Kevin;Brodribb, Tim J.;Zwieniecki, Maciej A.
通讯作者：
Zwieniecki, Maciej A.