| Title: | Fighting on two fronts: Elevated insect resistance in flooded maize |
| Author(s): | Block AK; Hunter CT; Sattler SE; Rering C; McDonald S; Basset GJ; Christensen SA; |
| Address: | "Chemistry Research Unit, Center for Medical, Agricultural and Veterinary Entomology, U.S. Department of Agriculture-Agricultural Research Service, Gainesville, FL, 32608, USA. Wheat, Sorghum, and Forage Research Unit, U.S. Department of Agriculture-Agricultural Research Service, Lincoln, NE, 68583, USA. Department of Horticultural Sciences, University of Florida, Gainesville, FL, 32611, USA" |
| ISSN/ISBN: | 1365-3040 (Electronic) 0140-7791 (Linking) |
| Abstract: | "To grow and thrive plants must be able to adapt to both adverse environmental conditions and attack by a variety of pests. Elucidating the sophisticated mechanisms plants have developed to achieve this has been the focus of many studies. What is less well understood is how plants respond when faced with multiple stressors simultaneously. In this study, we assess the response of Zea mays (maize) to the combinatorial stress of flooding and infestation with the insect pest Spodoptera frugiperda (fall armyworm). This combined stress leads to elevated production of the defence hormone salicylic acid, which does not occur in the individual stresses, and the resultant salicylic acid-dependent increase in S. frugiperda resistance. Remodelling of phenylpropanoid pathways also occurs in response to this combinatorial stress leading to increased production of the anti-insect C-glycosyl flavones (maysins) and the herbivore-induced volatile phenolics, benzyl acetate, and phenethyl acetate. Furthermore, changes in cellular redox status also occur, as indicated by reductions in peroxidase and polyphenol oxidase activity. These data suggest that metabolite changes important for flooding tolerance and anti-insect defence may act both additively and synergistically to provide extra protection to the plant" |
| Keywords: | "Animals Catechol Oxidase/metabolism Disease Resistance/*physiology *Floods Gene Expression Regulation, Plant Herbivory/physiology Insecta/*physiology Larva/physiology Peroxidase/metabolism Plant Diseases Salicylic Acid/metabolism Spodoptera/physiology Zea;" |
| Notes: | "MedlineBlock, Anna K Hunter, Charles T Sattler, Scott E Rering, Caitlin McDonald, Samantha Basset, Gilles J Christensen, Shawn A eng Research Support, U.S. Gov't, Non-P.H.S. 2019/08/15 Plant Cell Environ. 2020 Jan; 43(1):223-234. doi: 10.1111/pce.13642. Epub 2019 Aug 22" |
