Copper amine oxidase 8 regulates arginine-dependent nitric oxide production in Arabidopsis thaliana.

ABSTRACT: Nitric oxide (NO) is a key signaling molecule in plants, regulating a wide range of physiological processes. However, its origin in plants remains unclear. It can be generated from nitrite through a reductive pathway, notably via the action of the nitrate reductase (NR), and evidence suggests an additional oxidative pathway, involving arginine. From an initial screen of potential Arabidopsis thaliana mutants impaired in NO production, we identified copper amine oxidase 8 (CuAO8). Two cuao8 mutant lines displayed a decreased NO production in seedlings after elicitor treatment and salt stress. The NR-dependent pathway was not responsible for the impaired NO production as no change in NR activity was found in the mutants. However, total arginase activity was strongly increased in cuao8 knocko

SUBMITTER: Groß F 

PROVIDER: S-EPMC5447880 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature