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叶脉

植物的网状叶脉

叶脉是叶片上的维管束组织，具有输导和支持功能。按粗细分为主脉、侧脉和细脉三种。叶脉在叶片中的分布形式称为脉序。维管植物的脉序分为网状脉序和平行脉序。

叶脉密度会影响叶片水分运输。高密度叶脉水分运输效率较高[1]；同时也能提高植物的防御能力，使动物进食时需要消耗更多的能量来切断叶脉[2]。

参考文献

[编辑]
  1. ^ Wu, Yiling; Li, Fanglan; Hu, Hui. The Structure and Function of Leaf Veins and Their Influence on Leaf Economic Spectrum. Chinese Bulletin of Botany. 2022-05-01, 57 (3): 388. doi:10.11983/CBB21203. 
  2. ^ Read, J.; Stokes, A. Plant biomechanics in an ecological context. American Journal of Botany. 2006-10-01, 93 (10): 1546–1565. doi:10.3732/ajb.93.10.1546. 
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叶脉
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