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- Title
Identification of an orthologous clade of peroxidases that respond to feeding by greenbugs (Schizaphis graminum) in C<sub>4</sub> grasses.
- Authors
Scully, Erin D.; Donze-Reiner, Teresa; Haichuan Wang; Eickhoff, Thomas E.; Baxendale, Frederick; Twigg, Paul; Kovacs, Frank; Heng-Moss, Tiffany; Sattler, Scott E.; Sarath, Gautam
- Abstract
Knowledge of specific peroxidases that respond to aphid herbivory is limited in C4 grasses, but could provide targets for improving defence against these pests. A sorghum (Sorghum bicolor (L.) Moench) peroxidase (SbPrx-1; Sobic.002G416700) has been previously linked to biotic stress responses, and was the starting point for this study. Genomic analyses indicated that SbPrx-1 was part of a clade of five closely related peroxidase genes occurring within a ~30 kb region on chromosome 2 of the sorghum genome. Comparison of this ~30-kb region to syntenic regions in switchgrass (Panicum virgatum L.) and foxtail millet (Setaria italica L.) identified similar related clusters of peroxidases. Infestation of a susceptible sorghum cultivar with greenbugs (Shizaphis graminum Rondani) induced three of the five peroxidases. Greenbug infestation of switchgrass and foxtail millet plants showed similar inductions of peroxidases. SbPrx-1 was also induced in response to aphid herbivory in a greenbug-resistant sorghum line, Cargill 607E. These data indicate that this genomic region of C4 grasses could be valuable as a marker to assess potential insect resistance in C4 grasses.
- Subjects
GREENBUG; PEROXIDASE; PLANT defenses; SORGHUM; GENOMICS
- Publication
Functional Plant Biology, 2016, Vol 43, Issue 12, p134
- ISSN
1445-4408
- Publication type
Article
- DOI
10.1071/FP16104