Stomata in early land plants: an anatomical and ecophysiological approach
Stomata in early land plants: an anatomical and ecophysiological approach
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DOI：
10.1093/jexbot/49.suppl_1.255
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发表时间：
1998-03-01
影响因子：
6.9
通讯作者：
Hass, H
中科院分区：
文献类型：
--
作者：
Edwards, D;Kerp, H;Hass, H
志留纪和下泥盆世气孔的描述基于铜，煤化压缩和Permineralization揭示了与苔藓和某些蕨类植物的相似之处，并有助于理解保卫细胞运动的机制。详细调查的气孔复合体，气孔室和皮层组织在Rhynie燧石植物的适应，以减少水分流失的气孔周围区域和这些，再加上一个专门的薄壁组织与广泛的细胞间隙系统在基地的气孔室，点高水分利用效率。较低的气孔频率进行了讨论，水分胁迫和假定的高大气二氧化碳浓度。轴向志留纪和基底泥盆纪化石中的气孔数量和分布构成了推测导致气孔进化的选择性压力（例如蒸腾流的产生，H2O和营养物质的获取，温度控制）的基础，尽管化石记录没有提供进化途径的直接证据。
Descriptions of Silurian and Lower Devonian stomata based on cuticles, coalified compressions and permineralizations reveal similarities with those in mosses and certain ferns, and facilitate understanding about the mechanism of guard cell movements. A detailed survey of stomatal complexes, substomatal chambers and cortical tissues in Rhynie Chert plants suggest adaptations to reduce water loss in peristomatal regions and these, together with a specialized parenchymatous tissue with an extensive intercellular space system at the base of the substomatal chamber, point to high water use efficiency. Lower stomatal frequencies are discussed in relation to water stress and postulated high atmospheric carbon dioxide concentrations. Stomatal numbers and distribution in axial Silurian and basal Devonian fossils form the basis for speculation on the selective pressures (e.g. the generation of a transpiration stream, H2O and nutrient acquisition, temperature control) that led to the evolution of stomata, although the fossil record provides no direct evidence for evolutionary pathways.