A DNA encoding a neoxanthin cleavage
enzyme used for improving stress tolerance in a
plant, a method for increasing stress tolerance in a
plant by introducing the
DNA into the
plant, and a transgenic plant into which a neoxanthin cleavage
enzyme gene is introduced, are provided.
A DNA used for reducing stress tolerance in a plant, a method for decreasing stress tolerance in a plant by introducing the
DNA into the plant, and a transgenic plant into which the
DNA is introduced, are also provided. The present invention enables creating a plant in which stress tolerance has been increased or decreased.