Abstract:

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。 关键词： 抗旱性；甜菜碱醛脱氢酶；小麦；高粱
 

Key words: Arabidopsis thaliana , low K+-tolerance, mutant