Artículos de revistas
Gut bacteria facilitate adaptation to crop rotation in the western corn rootworm
Fecha
2013-06Registro en:
Chu, C. C.; Spencer, J.; Curzi, M.; Zavala, Jorge Alberto; Seufferheld, Manfredo Jose; Gut bacteria facilitate adaptation to crop rotation in the western corn rootworm; Natl Acad Sciences; Proceedings Of The National Academy Of Sciences Of The United States Of America; 110; 6-2013; 11917-11922
0027-8424
Autor
Chu, C. C.
Spencer, J.
Curzi, M.
Zavala, Jorge Alberto
Seufferheld, Manfredo Jose
Resumen
Insects are constantly adapting to human-driven landscape changes;
however, the roles of their gut microbiota in these processes remain
largely unknown. The western corn rootworm (WCR, Diabrotica virgifera
virgifera LeConte) (Coleoptera: Chrysomelidae) is amajor corn
pest that has been controlled via annual rotation between corn (Zea
mays) and nonhost soybean (Glycine max) in the United States. This
practice selected for a ?rotation-resistant? variant (RR-WCR) with reduced
ovipositional fidelity to cornfields.When in soybean fields, RRWCRs
also exhibit an elevated tolerance of antiherbivory defenses
(i.e., cysteine protease inhibitors) expressed in soybean foliage. Here
we show that gut bacterial microbiota is an important factor facilitating
this corn specialist?s (WCR?s) physiological adaptation to brief
soybean herbivory. Comparisons of gut microbiota between RR- and
wild-type WCR (WT-WCR) revealed concomitant shifts in bacterial
community structure with host adaptation to soybean diets. Antibiotic
suppression of gut bacteria significantly reduced RR-WCR tolerance
of soybean herbivory to the level of WT-WCR, whereas WTWCR
were unaffected. Our findings demonstrate that gut bacteria
help to facilitate rapid adaptation of insects inmanaged ecosystems.