| Title: | Spectral characterization of wheat functional trait responses to Hessian fly: Mechanisms for trait-based resistance |
| Author(s): | Campos-Medina VA; Cotrozzi L; Stuart JJ; Couture JJ; |
| Address: | "Department of Entomology, Purdue University, West Lafayette, IN, United States of America. Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN, United States of America. Center for Plant Biology, Purdue University, West Lafayette, IN, United States of America" |
| DOI: | 10.1371/journal.pone.0219431 |
| ISSN/ISBN: | 1932-6203 (Electronic) 1932-6203 (Linking) |
| Abstract: | "Insect herbivores can manipulate host plants to inhibit defenses. Insects that induce plant galls are excellent examples of these interactions. The Hessian fly (HF, Mayetiola destructor) is a destructive pest of wheat (Triticum spp.) that occurs in nearly all wheat producing globally. Under compatible interactions (i.e., successful HF establishment), HF larvae alter host tissue physiology and morphology for their benefit, manifesting as the development of plant nutritive tissue that feeds the larva and ceases plant cell division and elongation. Under incompatible interactions (i.e., unsuccessful HF establishment), plants respond to larval feeding by killing the larva, permitting normal plant development. We used reflectance spectroscopy to characterize whole-plant functional trait responses during both compatible and incompatible interactions and related these findings with morphological and gene expression observations from earlier studies. Spectral models successfully characterized wheat foliar traits, with mean goodness of fit statistics of 0.84, 0.85, 0.94, and 0.69 and percent root mean square errors of 22, 10, 6, and 20%, respectively, for nitrogen and carbon concentrations, leaf mass per area, and total phenolic content. We found that larvae capable of generating compatible interactions successfully manipulated host plant chemical and morphological composition to create a more hospitable environment. Incompatible interactions resulted in lower host plant nutritional quality, thicker leaves, and higher phenolic levels. Spectral measurements successfully characterized wheat responses to compatible and incompatible interactions, providing an excellent example of the utility of Spectral phenotyping in quantifying responses of specific plant functional traits associated with insect resistance" |
| Keywords: | "Animals Diptera/genetics/*pathogenicity/physiology Disease Resistance/genetics/physiology Food Chain Genes, Insect Genes, Plant Genotype Herbivory/physiology Host-Parasite Interactions/genetics/physiology Plant Diseases/genetics/parasitology Plant Tumors/;" |
| Notes: | "MedlineCampos-Medina, Veronica A Cotrozzi, Lorenzo Stuart, Jeffrey J Couture, John J eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2019/08/23 PLoS One. 2019 Aug 22; 14(8):e0219431. doi: 10.1371/journal.pone.0219431. eCollection 2019" |
