生物
脱落酸
拟南芥
转录组
拟南芥
耐旱性
限制
适应(眼睛)
活性氧
基因复制
细胞生物学
基因
蒸腾作用
植物
基因表达
遗传学
光合作用
机械工程
神经科学
突变体
工程类
作者
Juan C. del Pozo,Elena Ramirez‐Parra
摘要
Whole genome duplication (autopolyploidy) is common in many plant species and often leads to better adaptation to adverse environmental conditions. However, little is known about the physiological and molecular mechanisms underlying these adaptations. Drought is one of the major environmental conditions limiting plant growth and development. Here, we report that, in Arabidopsis thaliana, tetraploidy promotes alterations in cell proliferation and organ size in a tissue-dependent manner. Furthermore, it potentiates plant tolerance to salt and drought stresses and decreases transpiration rate, likely through controlling stomata density and closure, abscisic acid (ABA) signalling and reactive oxygen species (ROS) homeostasis. Our transcriptomic analyses revealed that tetraploidy mainly regulates the expression of genes involved in redox homeostasis and ABA and stress response. Taken together, our data have shed light on the molecular basis associated with stress tolerance in autopolyploid plants.
科研通智能强力驱动
Strongly Powered by AbleSci AI