Reducing Stomatal Density in Barley Improves Drought Tolerance without Impacting on Yield
Reducing Stomatal Density in Barley Improves Drought Tolerance without Impacting on Yield
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DOI：
10.1104/pp.16.01844
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发表时间：
2017-06-01
期刊：
影响因子：
7.4
通讯作者：
Gray, Julie E.
中科院分区：
文献类型：
--
作者：
Hughes, Jon;Hepworth, Christopher;Gray, Julie E.
分泌信号肽的表皮模式因子 (EPF) 家族调节模型双子叶植物和基底陆地植物物种的气孔发育频率。在这里，我们识别并操纵了大麦 (Hordeum vulgare) 直向同源物的表达，并证明当 HvEPF1 过度表达时，会限制气孔发育途径的进入和进展。尽管叶片气体交换大幅减少，但气孔密度显着降低的大麦植物并未表现出谷物产量下降。此外，HvEPF1OE大麦品系表现出显着提高的水分利用效率、耐旱性和土壤保水特性。我们的结果证明了在未来干旱环境下控制气孔频率以保护和优化谷类作物产量的潜力。
The epidermal patterning factor (EPF) family of secreted signaling peptides regulate the frequency of stomatal development in model dicot and basal land plant species. Here, we identify and manipulate the expression of a barley (Hordeum vulgare) ortholog and demonstrate that when overexpressed HvEPF1 limits entry to, and progression through, the stomatal development pathway. Despite substantial reductions in leaf gas exchange, barley plants with significantly reduced stomatal density show no reductions in grain yield. In addition, HvEPF1OE barley lines exhibit significantly enhanced water use efficiency, drought tolerance, and soil water conservation properties. Our results demonstrate the potential of manipulating stomatal frequency for the protection and optimization of cereal crop yields under future drier environments.