Aquaporins/metabolism; Arabidopsis Proteins/metabolism; Arabidopsis/metabolism; Gene Expression Regulation, Plant; Plant Roots/metabolism; Protein Processing, Post-Translational; Water/metabolism; Acetylation; Amides/metabolism; Amino Acid Sequence; Aquaporins/genetics; Arabidopsis/drug effects; Arabidopsis/genetics; Arabidopsis Proteins/genetics; Darkness; Genetic Variation; Hydrogen Peroxide/pharmacology; Mannitol/pharmacology; Methylation; Molecular Sequence Annotation; Molecular Sequence Data; Nitric Oxide/pharmacology; Phosphates/pharmacology; Phosphorylation; Plant Roots/drug effects; Plant Roots/genetics; Protein Isoforms/genetics; Protein Isoforms/metabolism; Sodium Chloride/pharmacology; Stress, Physiological; Sucrose/pharmacology