Host and endosymbiont heat tolerance

Researchers tested whether heat tolerance among 5 species of aphids varies with heat sensitivity of the species’ endosymbionts, and found that heat exposure–37-38 °C for 3-4 hours–reduced survival and reproduction in some species of aphids, while enhancing fecundity in other species; aphid species negatively affected by heat exposure exhibited corresponding declines in numbers of Buchnera, endosymbiotic bacteria that have co-evolved with aphids for more than 100 million years, suggesting that shifts in endosymbiont heat tolerance can influence host heat sensitivity and geographic range.

Article # 19-15307: “Obligate bacterial endosymbionts limit thermal tolerance of insect host species,” by Bo Zhang, Sean P. Leonard, Yiyuan Li, and Nancy A. Moran

MEDIA CONTACT: Nancy Moran, University of Texas at Austin, TX; e-mail:

[email protected]

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This part of information is sourced from https://www.eurekalert.org/pub_releases/2019-11/potn-hae111319.php

Nancy Moran

[email protected]

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