Ethyl methane-sulfonate (EMS)-mutagenized Arabidopsis M2 populations were screened in low-K+ medium using the root-bending assay. Forty-two putative low-K+-tolerant ( lkt ) mutants were selected from 150?000 tested M2 seedlings, and two of these mutants maintained their low-K+-tolerant phenotype in their M3 generations, respectively. Genetic analysis showed that either one of these two mutants has a monogenic recessive mutation in a nuclear gene, and that the two mutations in two independent mutants are allelic to each other.
不同基因型小麦和高梁的抗旱性与其种芽甜菜碱醛脱氢酶的关系
骆爱玲1刘家尧1马德钦2王学臣1 梁峥1
（1. 中国科学院植物研究所光合作用研究中心，北京100093；2. 中国科学院微生物研究所，北京100080；
3. 中国农业大学生物学院，北京100094）
摘要： 不同基因型小麦(Triticum aestivum L.)和高粱(Sorghum vulgare L.)的抗旱性与其种芽中的甜菜碱醛脱氢酶 (BADH) 的含量存在密切关系。种芽中的BADH含量可以作为种质资源抗旱性评价鉴定的参考指标。
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