Reactive oxygen species play a role in root response to nutrient deprivation

摘要

Potassium (K~+) is aa essential nutrient required by plants in large quantities, but changes in soil concentrations may limit K~+ acquisition by roots. It is not known how plant root cells sense or signal the changes that occur upon the onset of K~+ deficiency. Microarray experiments were performed that identified reactive oxygen species as a component of root response to K~+ deprivation. Experiments were also performed with nitrogen and phosphorus deprivation to determine whether ROS were involved in root response to other macronutrient deficiencies. Experiments showed that root hairs are important for ROS production in response to potassium and nitrogen deprivation and are not important for ROS production under phosphorus deprivation.