植物叶表面的气孔保卫细胞是研究信号转导的模式实验系统，对环境变化反应灵敏而准确。
Stomatal guard cells, with sensitive and accurate responses to environmental changes, are model experimental system to study signal transduction.
研究发现，焊缝中存在的界面反应物、气孔缺陷，是导致该种材料焊接性显著降低的主要因素。
The results show that the defects in the weld such as interface reactant and pore are the key factors to reduce the material weldability.
抗旱性与气孔对NO含量变化的灵敏度有关，旱地品种对叶片NO含量的变化具有较快速的反应。
Thedrought-resistance depend on the stomatal sensitivity to leaf NO content on the stomalevel, the stoma of dryland cultivar could rapidly response to the changing of leaf NOcontent.
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