Fecha/hora: 16/06/2024 10:03:49

Biblioteca(s): | INIA La Estanzuela.
Fecha corriente: | 09/08/2021
Fecha de la última actualización: | 06/09/2022
Autoria: | WATERMAN, J.M.; CIBILS-STEWART, X.; CAZZONELLI, C.I.; HARTLEY, S.E.; JOHNSON, S.N.
Afiliación: | JAMIE M. WATERMAN, Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, New South Wales 2751 Australia.; XIMENA CIBILS-STEWART, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay./ Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, New South Wales 2751 Australia.; CHRISTOPHER I. CAZZONELLI, Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, New South Wales 2751 Australia.; SUSAN E. HARTLEY, Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield S10 2TN UK.; SCOTT N. JOHNSON, Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, New South Wales 2751 Australia.
Título: | Short-term exposure to silicon rapidly enhances plant resistance to herbivory.
Año de publicación: | 2021
Fuente/Imprenta: | Ecology, 2021. Open Access. Doi: https://doi.org/10.1002/ecy.3438.
DOI: | 10.1002/ecy.3438.
Idioma: | Inglés
Notas: | Article history: Manuscript received 25 February 2021; Revised 29 April 2021; Accepted 25 May 2021.

Contenido:

Abstract: Silicon (Si) can adversely affect insect herbivores, particularly in plants that evolved the ability to accumulate large quantities of Si. Very rapid herbivore-induced accumulation of Si has recently been demonstrated, but the level of protection against herbivory this affords plants remains unknown. Brachypodium distachyon, a model Si hyperaccumulating grass, was exposed to the chewing herbivore, Helicoverpa armigera, and grown under three
conditions: supplied Si over 34 d (+Si), not supplied Si (-Si), or supplied Si once herbivory began (-Si +Si). We evaluated the effectiveness of each Si treatment at reducing herbivore performance and measured Si-based defenses and phenolics (another form of defense often reduced by Si). Although Si concentrations remained lower, within 72 h of exposure to Si, -Si +Si plants were as resistant to herbivory as +Si plants. Both +Si and -Si ? +Si treatments reduced herbivore damage and growth, and increased mandible wear compared to Si. After 6 h, herbivory increased filled Si cell density in -Si ? +Si plants, and within 24 h, -Si ? +Si plants reached similar filled Si cell densities to +Si plants, although decreased phenolics only occurred in +Si plants. We demonstrate that plants with short-term Si exposure can rapidly accumulate Si-based antiherbivore defenses as effectively as plants with long-term exposure.

Palabras-Clave: | Helicoverpa armigera; Herbivory; Plant defense; Silica cells; Silicon.
Thesagro: | ENTOMOLOGIA.
Categoría del tema: | H10 Plagas de las plantas

URL:

http://www.ainfo.inia.uy/digital/bitstream/item/16719/1/Ecology-2021-Waterman-Short8208term-exposure-to-silicon-rapidly-enhances-plant-resistance-to-herbivory.pdf
https://esajournals.onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.3438

Registro original: | INIA La Estanzuela (LE)
Ejemplares: | LE - (103427-1) - PXI - AP - DD - PP/Ecology/2021 -  -  - DIS