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 | Acceso al texto completo restringido a Biblioteca INIA La Estanzuela. Por información adicional contacte bib_le@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha : |
22/10/2021 |
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Actualizado : |
25/10/2021 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
JOHNSON, S.N.; WATERMAN, J.M.; WUHRER, R.; ROWE, R.C.; HALL, C.R.; CIBILS-STEWART, X. |
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Afiliación : |
SCOTT N. JOHNSON; JAMIE M. WATERMAN; RICHARD WUHRER; RHIANNON C. ROWE; CASEY R. HALL; XIMENA CIBILS-STEWART, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay./ Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia. |
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Título : |
Siliceous and non-nutritious: Nitrogen limitation increases anti-herbivore silicon defences in a model grass. |
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Fecha de publicación : |
2021 |
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Fuente / Imprenta : |
Journal of Ecology, 2021. Doi: https://doi.org/10.1111/1365-2745.13755 |
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DOI : |
10.1111/1365-2745.13755 |
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Idioma : |
Inglés |
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Notas : |
Article history: First published: 29 July 2021/ Received: 24 March 2021/ Accepted: 28 June 2021. |
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Contenido : |
Abstract:
Silicon (Si) accumulation alleviates a diverse array of environmental stresses in many plants, including conferring physical resistance against insect herbivores. It has been hypothesised that grasses, in particular, utilise ?low metabolic cost? Si for structural and defensive roles under nutrient limitation. While carbon (C) concentrations often negatively correlate with Si concentrations, the relationship between nitrogen (N) status and Si is more variable. Moreover, the impacts of N limitation on constitutive physical Si defences (e.g. silica and prickle cells) against herbivores are unknown. We determined how N limitation affected Si deposition in the model grass Brachypodium distachyon and how changes in these constitutive defences impacted insect herbivore Helicoverpa armigera growth rates. We used scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry in conjunction with X-ray mapping (XRM) to quantify physical structures on leaves and determine Si deposition patterns. We also determined how N limitation and Si supply impacted the jasmonic acid (JA) pathway, the master regulator of induced defences against arthropod herbivores.N limitation reduced shoot growth by over 40%, but increased root mass (+21%), leaf Si concentrations (+50%) and the density of silica (+28%) and flattened prickle (+76%) cells. Energy-dispersive X-ray spectroscopy and XRM established that Si was being deposited in these structures, together with hooked prickle cells and macro-hairs. Herbivore relative growth rates (RGR) were more than 115% lower in Si-supplied plants compared to plants without Si supply and negatively correlated with leaf Si concentration and silica cell density. RGR was further reduced by N limitation and positively correlated with leaf N concentrations. Increases in JA concentrations following induction of the JA pathway were at least doubled by N limitation.Synthesis. Si accumulation and deposition were highly regulated by N availability, with N limitation promoting both constitutive Si physical defences and induction of the JA defensive pathway, in line with the resource availability hypothesis. These results indicate that grasses use ?low-cost Si? when resources are limited and suggest that plant productivity may benefit from optimising conventional fertilisers and Si fertilisation. MenosAbstract:
Silicon (Si) accumulation alleviates a diverse array of environmental stresses in many plants, including conferring physical resistance against insect herbivores. It has been hypothesised that grasses, in particular, utilise ?low metabolic cost? Si for structural and defensive roles under nutrient limitation. While carbon (C) concentrations often negatively correlate with Si concentrations, the relationship between nitrogen (N) status and Si is more variable. Moreover, the impacts of N limitation on constitutive physical Si defences (e.g. silica and prickle cells) against herbivores are unknown. We determined how N limitation affected Si deposition in the model grass Brachypodium distachyon and how changes in these constitutive defences impacted insect herbivore Helicoverpa armigera growth rates. We used scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry in conjunction with X-ray mapping (XRM) to quantify physical structures on leaves and determine Si deposition patterns. We also determined how N limitation and Si supply impacted the jasmonic acid (JA) pathway, the master regulator of induced defences against arthropod herbivores.N limitation reduced shoot growth by over 40%, but increased root mass (+21%), leaf Si concentrations (+50%) and the density of silica (+28%) and flattened prickle (+76%) cells. Energy-dispersive X-ray spectroscopy and XRM established that Si was being deposited in these structures, together with hooked prickle cel... Presentar Todo |
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Palabras claves : |
Insect herbivores; Jasmonate; Plant defence; Plant nutrients; Scanning electron microscopy; Silica; Silicon. |
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Thesagro : |
HIERBAS; INSECTOS; NUTRICION DE PLANTAS. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 03387naa a2200325 a 4500
001 1062494
005 2021-10-25
008 2021 bl uuuu u00u1 u #d
024 7 $a10.1111/1365-2745.13755$2DOI
100 1 $aJOHNSON, S.N.
245 $aSiliceous and non-nutritious$bNitrogen limitation increases anti-herbivore silicon defences in a model grass.$h[electronic resource]
260 $c2021
500 $aArticle history: First published: 29 July 2021/ Received: 24 March 2021/ Accepted: 28 June 2021.
520 $aAbstract: Silicon (Si) accumulation alleviates a diverse array of environmental stresses in many plants, including conferring physical resistance against insect herbivores. It has been hypothesised that grasses, in particular, utilise ?low metabolic cost? Si for structural and defensive roles under nutrient limitation. While carbon (C) concentrations often negatively correlate with Si concentrations, the relationship between nitrogen (N) status and Si is more variable. Moreover, the impacts of N limitation on constitutive physical Si defences (e.g. silica and prickle cells) against herbivores are unknown. We determined how N limitation affected Si deposition in the model grass Brachypodium distachyon and how changes in these constitutive defences impacted insect herbivore Helicoverpa armigera growth rates. We used scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry in conjunction with X-ray mapping (XRM) to quantify physical structures on leaves and determine Si deposition patterns. We also determined how N limitation and Si supply impacted the jasmonic acid (JA) pathway, the master regulator of induced defences against arthropod herbivores.N limitation reduced shoot growth by over 40%, but increased root mass (+21%), leaf Si concentrations (+50%) and the density of silica (+28%) and flattened prickle (+76%) cells. Energy-dispersive X-ray spectroscopy and XRM established that Si was being deposited in these structures, together with hooked prickle cells and macro-hairs. Herbivore relative growth rates (RGR) were more than 115% lower in Si-supplied plants compared to plants without Si supply and negatively correlated with leaf Si concentration and silica cell density. RGR was further reduced by N limitation and positively correlated with leaf N concentrations. Increases in JA concentrations following induction of the JA pathway were at least doubled by N limitation.Synthesis. Si accumulation and deposition were highly regulated by N availability, with N limitation promoting both constitutive Si physical defences and induction of the JA defensive pathway, in line with the resource availability hypothesis. These results indicate that grasses use ?low-cost Si? when resources are limited and suggest that plant productivity may benefit from optimising conventional fertilisers and Si fertilisation.
650 $aHIERBAS
650 $aINSECTOS
650 $aNUTRICION DE PLANTAS
653 $aInsect herbivores
653 $aJasmonate
653 $aPlant defence
653 $aPlant nutrients
653 $aScanning electron microscopy
653 $aSilica
653 $aSilicon
700 1 $aWATERMAN, J.M.
700 1 $aWUHRER, R.
700 1 $aROWE, R.C.
700 1 $aHALL, C.R.
700 1 $aCIBILS-STEWART, X.
773 $tJournal of Ecology, 2021. Doi: https://doi.org/10.1111/1365-2745.13755
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| 2. |  | Rios, A. Alelopatia ln: Curso de Actualización Tecnica en Manejo de Malezas, 2 : 1996 jun 25-27 : La Estanzuela Ríos, A. (coord). [Memorias]. Montevideo (Uruguay): INIA, 1996. s.p. Publicación de Apoyo| Biblioteca(s): INIA La Estanzuela. |
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| 5. | | RÍOS, A. Alternativas químicas en cultivos de verano. ln: Seminario Actualizando la Tecnología en Control de Malezas, La Estanzuela, Colonia, set 2000 [s.l.]: INIA La Estanzuela, 2000. p. 48-54. (Serie Actividades de Difusión; 234).| Biblioteca(s): INIA La Estanzuela. |
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| 8. | | RIOS, A. Consideraciones para el manejo eficiente de las malezas en forrajeras In: RISSO, D.; BERRETTA, E.J.; MORON, A. (Eds.). Producción y manejo de pasturas. Seminario técnico, 17-19 octubre 1995, INIA Tacuarembó. Montevideo (Uruguay): INIA, 1996. p77-84 (INIA Serie Técnica; 80)| Tipo: Capítulo en Libro Técnico-Científico |
| Biblioteca(s): INIA La Estanzuela; INIA Las Brujas; INIA Tacuarembó. |
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| 9. | | Ríos, A. Control de cuscuta ln: Curso de Actualización Tecnica en Manejo de Malezas, 2 : 1996 jun 25-27 : La Estanzuela Ríos, A. (coord). [Memorias]. Montevideo (Uruguay): INIA, 1996. s.p. Resumen de un trabajo realizado en La Estanzuela como trabajo de Tesis durante el período 1993-1994. - Publicación de Apoyo| Biblioteca(s): INIA La Estanzuela. |
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| 10. | | Rios, A. Control en Trebol blanco de primer año ln: Jornada Técnica Manejo de Malezas en Forrajeras, 1995 oct : La Estanzuela [Memorias]. Montevideo (Uruguay): INIA, 1995. p1-14 Es una Publicación de Apoyo| Biblioteca(s): INIA La Estanzuela. |
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| 12. | | RÍOS, A. Control de gramíneas en trigo y cebada. ln: Cultivos de invierno: día de campo, 2004 Trabajos presentados. La Estanzuela, Colonia (Uruguay): INIA, 2004. p. 3-8 (INIA Serie Actividades de Difusión ; 384) INIA La Estanzuela| Biblioteca(s): INIA La Estanzuela; INIA Las Brujas. |
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| 13. | | RÍOS, A. Control integrado de capin annoni (Eragrostis plana) In: AYALA, W.; SARAVIA, H. (Eds.). Seminario de actualización técnica en control y manejo de malezas de campo sucio. Montevideo (Uruguay): INIA, 2007 p. 57-64 (INIA Serie Técnica ; 164)| Tipo: Capítulo en Libro Técnico-Científico |
| Biblioteca(s): INIA Las Brujas; INIA Tacuarembó. |
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| 14. | | Ríos, A. Control integrado de capin annoni (Eragrostis plana> ln: Reunión del grupo técnico en forrajeras del Cono Sur, 22., 2008, Minas, Uruguay Bioma campos: innovando para mantener su sustentabilidad y competitividad. Memorias. Minas (Uruguay): INIA; FAO; PROCISUR, 2008. p. 257 Versión impresa y en CD ROM Instituto Nacional de Investigación Agropecuaria, Uruguay; FAO; PROCISUR| Biblioteca(s): INIA Las Brujas; INIA Tacuarembó. |
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| 16. | | Rios, A. Control integrado de gramilla ln: Dia de Campo Cultivos de Verano, 1981 feb 12 : La Estanzuela [Memorias]. Montevideo (Uruguay): CIAAB, 1981. p12 Dia de Campo Cultivos de Verano (CIAAB)| Biblioteca(s): INIA La Estanzuela. |
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| 17. | | Rios, A. Control integrado de gramilla ln: Curso de Actualización Tecnica en Manejo de Malezas, 2 : 1996 jun 25-27 : La Estanzuela Ríos, A. (coord). [Memorias]. Montevideo (Uruguay): INIA, 1996. s.p. Resumen de un trabajo realizado en La Estanzuela como trabajo de Tesis durante el período 1993-1994. - Publicación de Apoyo| Biblioteca(s): INIA La Estanzuela. |
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| Registros recuperados : 222 | |
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