突变体
拟南芥
生物
表型
耐旱性
拟南芥
基因型
抗旱性
栽培
抗性(生态学)
农学
干旱胁迫
等位基因
基因
遗传学
作者
Daniel Ginzburg,Flavia Bossi,Seung Y. Rhee
出处
期刊:Plant Physiology
[Oxford University Press]
日期:2022-09-02
卷期号:190 (4): 2115-2121
被引量:7
标识
DOI:10.1093/plphys/kiac411
摘要
Understanding the molecular and physiological mechanisms of how plants respond to drought is paramount to breeding more drought-resistant crops. Certain mutations or allelic variations result in plants with altered water-use requirements. To correctly identify genetic differences which confer a drought phenotype, plants with different genotypes must be subjected to equal levels of drought stress. Many reports of advantageous mutations conferring drought resistance do not control for soil water content (SWC) variations across genotypes and may therefore need to be re-examined. Here, we reassessed the drought phenotype of the Arabidopsis (Arabidopsis thaliana) dwarf mutant, chiquita1-1 (chiq1-1, also called constitutively stressed 1 (cost1)), by growing mutant seedlings together with the wild-type to ensure uniform soil water availability across genotypes. Our results demonstrate that the dwarf phenotype conferred by loss of CHIQ1 function results in constitutively lower water usage per plant, but not increased drought resistance. Our study provides an easily reproducible, low-cost method to measure and control for SWC and to compare drought-resistant genotypes more accurately.
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