Altered redox processes, defense responses, and flowering time are associated with survival of the temperate Camelina sativa under subtropical conditions

•Seed yield of the temperate Camelina sativa is reduced in subtropical area.•Subtropics-adapted Camelina sativa were cultivated with mutant breeding.•Subtropics-adapted mutants are late flowering.•Subtropics-adapted mutants exhibited enhanced antioxidant and defense response.