Arabidopsis Proteins/genetics; Arabidopsis/physiology; Ethylenes/metabolism; Hemoglobins/metabolism; Nitric Oxide/metabolism; Oxygen/metabolism; Arabidopsis/genetics; Arabidopsis/metabolism; Arabidopsis Proteins/metabolism; Ethylenes/analysis; Floods; Gene Expression; Gene Expression Regulation, Plant; Hemoglobins/genetics; Models, Biological; Nitric Oxide/analysis; Nitrogen/metabolism; Phenotype; Plant Leaves/genetics; Plant Leaves/metabolism; Plant Leaves/physiology; Plant Roots/genetics; Plant Roots/metabolism; Plant Roots/physiology; Plant Shoots/genetics; Plant Shoots/metabolism; Plant Shoots/physiology; S-Nitrosothiols/analysis; S-Nitrosothiols/metabolism; Signal Transduction; Stress, Physiological; Up-Regulation