Early Changes in Nitrate Uptake and Assimilation Under Drought in Relation to Transpiration.

ABSTRACT: Soil drying combined with nitrogen (N) deficiency poses a grave threat to agricultural crop production. The rate at which nitrate (NO₃ ^-) is taken up depends partly on the uptake and transpiration of water. Rapid changes in nitrate assimilation, in contrast to other N forms, may serve as a component of the plant stress response to drought because nitrate assimilation may lead to changes in xylem pH. The modulation of xylem sap pH may be relevant for stomata regulation via the delivery of abscisic acid (ABA) to guard cells. In several factorial experiments, we investigated the interactions between nitrate and water availability on nitrate fate in the plant, as well as their possible implications for the early drought-stress response. We monitored the short-term

SUBMITTER: Gloser V 

PROVIDER: S-EPMC7793686 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature