EVOLUTIONARY VOYAGE OF ANGIOSPERM VESSEL STRUCTURE-FUNCTION AND ITS SIGNIFICANCE FOR EARLY ANGIOSPERM SUCCESS
EVOLUTIONARY VOYAGE OF ANGIOSPERM VESSEL STRUCTURE-FUNCTION AND ITS SIGNIFICANCE FOR EARLY ANGIOSPERM SUCCESS
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DOI：
10.1086/666099
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发表时间：
2012-07-01
影响因子：
2.3
通讯作者：
Wilson, Jonathan P.
中科院分区：
文献类型：
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作者：
Feild, Taylor S.;Wilson, Jonathan P.
被子植物维管网络的一个假设的优势，导管，经常被引用为一个关键的创新，提高了早期被子植物的竞争能力在白垩纪非被子植物。在这里，我们综合了最近发现的活的基底被子植物谱系的水力功能的证据，从化石记录追溯早期进化意义的导管在被子植物的早期生态生理辐射。从现存的比较生物学和早白垩世的化石记录的树叶和木材的证据不支持的假设，船只提高了被子植物的耐旱性，增加被子植物的光合能力，或提供了一个立即飞跃的水力能力。相反，后来调整的容器结构，增加流动效率，特别是通过简单的穿孔板的演变，使主要增加木质部水力效率。
A hypothesized advantage of the building block of the angiosperm vascular network, the vessel, is often cited as a critical innovation that elevated the competitive abilities of early angiosperms above nonangiosperms during the Cretaceous. Here we synthesize recent discoveries on the hydraulic functions of living basal angiosperm lineages with evidence from the fossil record to trace the early evolutionary significance of vessels in the early ecophysiological radiation of angiosperms. Evidence from extant comparative biology and the Early Cretaceous fossil record of leaves and wood do not support the hypotheses that vessels improved drought tolerance of angiosperms, increased angiosperm's photosynthetic abilities, or provided an immediate leap in hydraulic capacity. Instead, later tuning of vessel structure for increased flow efficiency-in particular, by the evolution of simple perforation plates-enabled major increases in xylem hydraulic efficiency.