Substituted cyano cycloalkyl penta-2,4-dienes, cyano cycloalkyl pent-2-en-4-ynes, cyano heterocyclyl penta-2,4-dienes and cyano heterocyclyl pent-2-en-4-ynes as active substances against abiotic plant stressCyanocycloalkylpenta-2,4-dienes, cyanocycloalkylpent-2-en-4-ynes, cyanoheterocyclylpenta-2,4-dienes and cyanoheterocyclylpent-2-en-4-ynes of the general formula (I) or salts thereof where [X-Y], Q, R1, R2, A1, A2, V, W, m and n are each as defined in the description, to processes for preparation thereof and to the use thereof for enhancing stress tolerance in plants with respect to abiotic stress, and/or for increasing plant yield.