中文摘要：

利用化学诱变剂甲基磺酸乙酯（EMS）对模式植物拟南芥（Arabidopsis thaliana）进行化学诱变获得突变体筛选群体。在干旱胁迫下，以叶片的温度差异为筛选指标，利用远红外成像技术进行突变体的筛选，获得了对干旱不敏感突变体dril（drought—insensitive1）和敏感突变体drsl（drought—sensitive1）。实验结果表明dril和drsl为单基因隐性突变，气孔密度同野生型无差异，而叶片温度、气孔开度和叶片失水率则有明显改变。在MS培养基上的种子萌发实验表明在ABA、甘露醇和NaCl胁迫下dril萌发率要比野生型高，而drsl则比野生型低。对突变基因的研究有待进一步进行。

英文摘要：

Drought-sensitive mutant （dril） and drought-insensitive mutant（ drsl ） of Arabidopsis thaliana were screened with infrared thermography from an ethyl methane sulfonate-mutagenized population. These mutants were identified as monogenic recessive mutations. Stomata density of these mutants was the same as that of wild type. While, their stomata apertures, water loss and leaf temperature were distinct compared with those of wild type under drought stress. In addition, seed germination test on MS medium indicated that dril was more insensitive to ABA, mannitol and NaC1 than the wild type, but drsl was not.