Genome-wide identification and characterization of HSP gene superfamily in whitefly (Bemisia tabacl)and expression profiling analysis under temperature stress  

作　　者：Xin-Ru Wang Chao Wang Fei-Xue Ban Dan-Tong Zhu Shu-Sheng Liu Xiao-Wei Wang 

机构地区：[1]Ministry of Agriculture Key Laboratory of Agricultural Entomology,Institute of Insect Sciences,Zhejiang University,Hangzhou,China

出　　处：《Insect Science》2019年第1期44-57,共14页昆虫科学（英文版）

基　　金：the National Natural Science Foundation of China (31390421);the National Basic Research Program of China (2014CB138404).

摘　　要：Heat shock proteins (HSP)are essential molecular chaperones that play important roles in the stress stimulation of insects.Bemisia tabaci,a phloem feeder and invasive species,can cause extensive crop damage through direct feeding and transmission of plant viruses.Here we employed comprehensive genomics approaches to identity HSP superfamily members in the Middle East Asia Minor 1 whitefly genome.In total,we identified 26 Hsp genes,including three Hsp90,17 Hsp70,one Hsp60 and five sHSP (small heat shock protein)genes.The HSP gene superfamily of whitefly is expanded compared with the other five insects surveyed here.The gene structures among the same families are relatively conserved.Meanwhile,the motif compositions and secondary structures of BtHsp proteins were predicted.In addition,quantitative polymerase chain reaction analysis showed that the expression patterns of BtHsp gene superfamily were diverse across different tissues of whiteflies.Most Hsp genes were induced or repressed by thermal stress (40℃)and cold treatment (4℃)in whitefly.Silencing the expression of BtHsp70-6 significantly decreased the survival rate of whitefly under 45℃.All the results showed the Hsps conferred thermo-tolerance or cold-tolerance to whiteflies that protect them from being affected by detrimental temperature conditions.Our observations highlighted the molecular evolutionary properties and the response mechanism to temperature assaults of Hsp genes in whitefly.

关 键 词：cold STRESS comparative genomics HSP PHYLOGENETIC thermal STRESS WHITEFLY 

分 类 号：Q[生物学]