科研之友
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摘要
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 degrees C, the relative reproductive performance of B was seven-fold higher than Q. After short stress of 42 degrees C, these differences increased to 23-fold. A turnover took place after short stress of 43 and 45 degrees 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.
- 出版日期2011-5
