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Asymmetry in thermal tolerance trade‐offs between the B and Q sibling species of Bemisia tabaci (Hemiptera: Aleyrodidae)
Author(s) -
ELBAZ M.,
WEISER M.,
MORIN S.
Publication year - 2011
Publication title -
journal of evolutionary biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.289
H-Index - 128
eISSN - 1420-9101
pISSN - 1010-061X
DOI - 10.1111/j.1420-9101.2011.02241.x
Subject(s) - biology , hemiptera , sibling , whitefly , reproduction , heat stress , botany , pest analysis , zoology , ecology , psychology , developmental psychology
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.