Balancing Water Uptake and Loss through the Coordinated Regulation of Stomatal and Root Development.
Balancing Water Uptake and Loss through the Coordinated Regulation of Stomatal and Root Development.
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DOI：
10.1371/journal.pone.0156930
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Gray JE
中科院分区：
文献类型：
--
作者：
Hepworth C;Turner C;Landim MG;Cameron D;Gray JE
根系发育受养分和水分的影响。植物能够根据环境信号调整其根的许多属性，包括主根、侧根和根毛的大小和形状。在这里，我们调查了根的变化与改变气孔频率的叶片蒸腾水平的反应。我们发现，气孔密度和传导性高的植物产生更大的生根面积，因此有增强的磷酸盐吸收能力，而气孔传导性低的植物产生较小的根。操纵植物的生长环境表明，增强根系生长最有可能是对水而不是磷酸盐的需求增加的结果。操纵根毛生长增加或减少的植物分别显示气孔导度和密度的减少或增加。我们的结果表明，植物可以通过协调调节气孔和根系发育来平衡水分的吸收和损失。
Root development is influenced by nutrient and water availabilities. Plants are able to adjust many attributes of their root in response to environmental signals including the size and shape of the primary root, lateral roots and root hairs. Here we investigated the response of roots to changes in the levels of leaf transpiration associated with altered stomatal frequency. We found that plants with high stomatal density and conductance produce a larger rooting area and as a result have enhanced phosphate uptake capacity whereas plants with low stomatal conductance produce a smaller root. Manipulating the growth environment of plants indicated that enhanced root growth is most likely a result of an increased demand for water rather than phosphate. Plants manipulated to have an increase or reduction in root hair growth show a reduction or increase respectively, in stomatal conductance and density. Our results demonstrate that plants can balance their water uptake and loss through coordinated regulation of both stomatal and root development.