INBA   12521
INSTITUTO DE INVESTIGACIONES EN BIOCIENCIAS AGRICOLAS Y AMBIENTALES
Unidad Ejecutora - UE
artículos
Título:
Gut bacteria facilitate adaptation to crop rotation in the western corn rootworm
Autor/es:
CHU, C.C.; SPENCER, J.; CURZI, M.; ZAVALA, J. A.; SEUFFERHELD, M.
Revista:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Editorial:
NATL ACAD SCIENCES
Referencias:
Lugar: Washington DC, USA; Año: 2013 vol. 110 p. 11917 - 11922
ISSN:
0027-8424
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.