title: Asymmetry in thermal tolerance trade-offs between the B and Q sibling species of Bemisia tabaci (Hemiptera: Aleyrodidae).
abstract: We investigated life history trade-offs related to thermal tolerance in two sibling species, commonly referred to as the B and Q biotypes, of Bemisia tabaci. We focused on basal resistance to short unpredicted heat stress, which reflects the organism investment, during both optimal and stressful conditions, in insuring its survival. At 27 °C, the relative reproductive performance of B was seven-fold higher than Q. After short stress of 42 °C, these differences increased to 23-fold. A turnover took place after short stress of 43 and 45 °C, in which Q adults performed better. As the expression of the analysed Hsp70 and other stress-related genes was found to be higher in the Q species, our data likely reflects two different strategies for optimal performance. B lowers soma protection for achieving maximum reproduction ('direct inhibitory' trade-off model), whereas Q invests significant resources in being always 'ready' for a challenge.
authors.affiliation: Faculty of Agriculture, Department of Entomology, The Hebrew University of Jerusalem, Herzel 3, Rehovot, Israel.
authors.forename: M
authors.initials: M
authors.lastname: Elbaz
authors.forename: M
authors.initials: M
authors.lastname: Weiser
authors.forename: S
authors.initials: S
authors.lastname: Morin
mesh_terms: D000064:Acclimatization; D000818:Animals; D005260:Female; D018840:HSP70 Heat-Shock Proteins / Q000378:metabolism; D006430:Hemiptera / Q000502:physiology*; D006358:Hot Temperature; D008297:Male; D009068:Movement; D010058:Oviposition; D012726:Sexual Behavior, Animal; D013045:Species Specificity
chemical_list: D018840:HSP70 Heat-Shock Proteins