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An invasive alien weed, Ageratina adenophora, has become widespread in the southwest of China due to its high environmental adaptation. In the present study, in order to understand the molecular aspects of resistance to heat and cold stress, we investigated the characterization and expression of heat shock protein genes (designated as Aahsp70 and Aahsp90) in A. adenophora. The cDNA of A. adenophora Aahsp70...