| Title: | Silicon: Potential to Promote Direct and Indirect Effects on Plant Defense Against Arthropod Pests in Agriculture |
| Author(s): | Reynolds OL; Padula MP; Zeng R; Gurr GM; |
| Address: | "Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, FujianChina; Graham Centre for Agricultural Innovation, New South Wales Department of Primary Industries, Menangle, NSWAustralia. Proteomics Core Facility, School of Life Sciences, University of Technology Sydney, Sydney, NSW Australia. College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian China. Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, FujianChina; Graham Centre for Agricultural Innovation, Charles Sturt University, Orange, NSWAustralia" |
| ISSN/ISBN: | 1664-462X (Print) 1664-462X (Electronic) 1664-462X (Linking) |
| Abstract: | "Silicon has generally not been considered essential for plant growth, although it is well recognized that many plants, particularly Poaceae, have substantial plant tissue concentrations of this element. Recently, however, the International Plant Nutrition Institute [IPNI] (2015), Georgia, USA has listed it as a 'beneficial substance'. This reflects that numerous studies have now established that silicon may alleviate both biotic and abiotic stress. This paper explores the existing knowledge and recent advances in elucidating the role of silicon in plant defense against biotic stress, particularly against arthropod pests in agriculture and attraction of beneficial insects. Silicon confers resistance to herbivores via two described mechanisms: physical and biochemical/molecular. Until recently, studies have mainly centered on two trophic levels; the herbivore and plant. However, several studies now describe tri-trophic effects involving silicon that operate by attracting predators or parasitoids to plants under herbivore attack. Indeed, it has been demonstrated that silicon-treated, arthropod-attacked plants display increased attractiveness to natural enemies, an effect that was reflected in elevated biological control in the field. The reported relationships between soluble silicon and the jasmonic acid (JA) defense pathway, and JA and herbivore-induced plant volatiles (HIPVs) suggest that soluble silicon may enhance the production of HIPVs. Further, it is feasible that silicon uptake may affect protein expression (or modify proteins structurally) so that they can produce additional, or modify, the HIPV profile of plants. Ultimately, understanding silicon under plant ecological, physiological, biochemical, and molecular contexts will assist in fully elucidating the mechanisms behind silicon and plant response to biotic stress at both the bi- and tri-trophic levels" |
| Keywords: | Hipv effector proteins herbivore insect-plant interactions omics resistance mechanisms systems biology trophic interactions; |
| Notes: | "PubMed-not-MEDLINEReynolds, Olivia L Padula, Matthew P Zeng, Rensen Gurr, Geoff M eng Review Switzerland 2016/07/06 Front Plant Sci. 2016 Jun 13; 7:744. doi: 10.3389/fpls.2016.00744. eCollection 2016" |
