HSP90B2P and viral infectious disease: Only one Hsp gene was upregulated by the virus infection under cold stress (Unigene9618, an Hsp70, confirmed by RT-qPCR), whereas 10 Hsp genes (eight Hsp70, one Hsp90 and one Hsp20) and one Hsf gene were all downregulated under heat stress (with Unigene16177 and Unigene9991, an Hsp70 and an Hsp20, confirmed by RT-qPCR).