L-Aminoguanidine Induces Imbalance of ROS/RNS Homeostasis and Polyamine Catabolism of Tomato Roots after Short-Term Salt Exposure

Polyamine (PA) catabolism mediated by amine oxidases is an important process involved in fine-tuning PA homeostasis and related mechanisms during salt stress. The significance of these short-term responses to stress is, however, not well understood. In the present study, effects L-aminoguanidine (AG) on tomato roots treated with induced NaCl were studied. AG usually used as a copper oxidase (CuAO or DAO) inhibitor. our other alterations catabolism, such reduced polyamine (PAO), also observed AG-treated plants. Salt led increase reactive oxygen nitrogen species root apices, evidenced situ fluorescent staining free levels. Such alleviated treatment, showing possible antioxidant effect exposed catabolic enzyme activities decreased, while imbalance hydrogen peroxide (H2O2), nitric oxide (NO), sulfide (H2S) concentrations displayed dependence intensity. These changes suggest that AG-mediated inhibition could dramatically rearrange backgrounds, especially NO-related mechanisms. More studies are, needed decipher precise mode action plants treatments.