Heat Stress Tolerance in Plants

This invention proposes a method to make plants more resistant to (repeated) heat stress. This is done by means of using microRNA156 (miRNA156) to increase heat stress tolerance. miRNA156 is expressed under the control of a special heat-inducible promoter to minimize negative side effects such as enhanced leaf induction and later flowering. The proposed invention expresses miRNA156 exclusively by means of heat. The heat-inducible promoter HSP21 ensures that the expression of miR156 is “switched on” by
the application of heat.

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