The present invention relates to compositions and methods for increasing tolerance to abiotic stress and/or for reducing the consequence of abiotic stress in a plant and/or part thereof. In some aspects, the method comprises contacting a plant and/or part thereof with a first composition comprising one or more of aminoguanidine, L-nitroarginine, L-nitroarginine methyl ester, 2,2'-bipyridine, 4-methylpyrazole, 8-hydroxyquiniline, caprylic acid, pyrazole, naringenin, kaempferol, quercetin, dodecanoic acid, and/or undecanoic acid, and/or a salt thereof； and a second composition comprising at least one dicarboxylic acid and/or a salt thereof.
