Physiological responses of spring rapeseed [Brassica napus] to red - far - red ratios and irradiance during pre - and post - flowering stages
Early shade signals promote the shade avoidance syndrome [SAS] which causes, among others, petiole and shoot elongation and upward leaf position. In spite of its relevance, these photomorphogenic responses have not been deeply studied in rapeseed [Brassica napus]. In contrast to other crops like mai...
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| Formato: | Artículo |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2014rondanini.pdf LINK AL EDITOR |
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| 245 | 1 | 0 | |a Physiological responses of spring rapeseed [Brassica napus] to red - far - red ratios and irradiance during pre - and post - flowering stages |
| 520 | |a Early shade signals promote the shade avoidance syndrome [SAS] which causes, among others, petiole and shoot elongation and upward leaf position. In spite of its relevance, these photomorphogenic responses have not been deeply studied in rapeseed [Brassica napus]. In contrast to other crops like maize and wheat, rapeseed has a complex developmental phenotypic pattern as it evolves from an initial rosette to the main stem elongation and an indeterminate growth of floral raceme. In this work, we analyzed [1] morphological and physiological responses at individual level due to low red-far-red [R-FR] ratio during plant development, and [2] changes in biomass allocation, grain yield and composition at crop level in response to high R-FR ratio and low irradiance in two modern spring rapeseed genotypes. We carried out pot and field experiments modifying R-FR ratios and irradiance at vegetative or reproductive stages. In pot experiments, low R-FR ratio increased the petiole and lamina length, upward leaf position and also accelerated leaf senescence. Furthermore, low R-FR ratio reduced main floral raceme and increased floral branching with higher remobilization of soluble carbohydrates from the stems. In field experiments, low irradiance during post-flowering reduced grain yield, harvest index and grain oil content, and high R-FR ratio reaching the crop partially alleviated such effects. We conclude that photomorphogenic signals are integrated early during the vegetative growth, and irradiance has stronger effects than R-FR signals at rapeseed crop level. | ||
| 653 | 0 | |a BRASSICA NAPUS | |
| 653 | 0 | |a EXPERIMENTAL DESIGN | |
| 653 | 0 | |a GENOTYPES | |
| 653 | 0 | |a ARGENTINA | |
| 700 | 1 | |9 11330 |a Rondanini, Déborah Paola | |
| 700 | 1 | |a Vilariño, María del Pilar |9 22511 | |
| 700 | 1 | |a Roberts, Marcos Enrique |9 34486 | |
| 700 | 1 | |a Polosa, Marina Alejandra |9 34707 | |
| 700 | 1 | |9 65609 |a Botto, Javier Francisco | |
| 773 | |t Physiologia plantarum |g Vol.152, no.4 (2014), p.784-794, grafs., tbls. | ||
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| 900 | |a ^tPhysiological responses of spring rapeseed [Brassica napus] to red-far-red ratios and irradiance during pre- and post-flowering stages | ||
| 900 | |a ^aRondanini^bD. P. | ||
| 900 | |a ^aVilariño^bM. P. | ||
| 900 | |a ^aRoberts^bM. E. | ||
| 900 | |a ^aPolosa^bM. A. | ||
| 900 | |a ^aBotto^bJ. F. | ||
| 900 | |a ^aRondanini^bDéborah Paola | ||
| 900 | |a ^aVilariño^bMaría del Pilar | ||
| 900 | |a ^aRoberts^bMarcos Enrique | ||
| 900 | |a ^aPolosa^bMarina Alejandra | ||
| 900 | |a ^aBotto^bJavier Francisco | ||
| 900 | |a ^aRondanini^bDéborah Paola^tFacultad de Agronomía, Universidad de Buenos Aires, C1417DSE, Buenos Aires, Argentina y CONICET, C1033AAJ, Buenos Aires, Argentina | ||
| 900 | |a ^aVilariño^bMaría del Pilar^tFacultad de Agronomía, Universidad de Buenos Aires, C1417DSE, Buenos Aires, Argentina | ||
| 900 | |a ^aRoberts^bMarcos Enrique^tFacultad de Agronomía, Universidad de Buenos Aires, C1417DSE, Buenos Aires, Argentina | ||
| 900 | |a ^aPolosa^bMarina Alejandra^tFacultad de Agronomía, Universidad de Buenos Aires, C1417DSE, Buenos Aires, Argentina | ||
| 900 | |a ^aBotto^bJavier Francisco^tFacultad de Agronomía, Universidad de Buenos Aires, C1417DSE, Buenos Aires, Argentina y IFEVA, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, C1417DSE, Buenos Aires, Argentina - E-mail: botto@agro.uba.ar | ||
| 900 | |a ^tPhysiologia plantarum | ||
| 900 | |a en | ||
| 900 | |a p.784 | ||
| 900 | |a ^egrafs., tbls. | ||
| 900 | |a vol.152, no.4 (2014) | ||
| 900 | |a 794 | ||
| 900 | |a BRASSICA NAPUS | ||
| 900 | |a EXPERIMENTAL DESIGN | ||
| 900 | |a GENOTYPES | ||
| 900 | |a ARGENTINA | ||
| 900 | |a Early shade signals promote the shade avoidance syndrome [SAS] which causes, among others, petiole and shoot elongation and upward leaf position. | ||
| 900 | |a In spite of its relevance, these photomorphogenic responses have not been deeply studied in rapeseed [Brassica napus]. | ||
| 900 | |a In contrast to other crops like maize and wheat, rapeseed has a complex developmental phenotypic pattern as it evolves from an initial rosette to the main stem elongation and an indeterminate growth of floral raceme. | ||
| 900 | |a In this work, we analyzed [1] morphological and physiological responses at individual level due to low red-far-red [R-FR] ratio during plant development, and [2] changes in biomass allocation, grain yield and composition at crop level in response to high R-FR ratio and low irradiance in two modern spring rapeseed genotypes. | ||
| 900 | |a We carried out pot and field experiments modifying R-FR ratios and irradiance at vegetative or reproductive stages. | ||
| 900 | |a In pot experiments, low R-FR ratio increased the petiole and lamina length, upward leaf position and also accelerated leaf senescence. | ||
| 900 | |a Furthermore, low R-FR ratio reduced main floral raceme and increased floral branching with higher remobilization of soluble carbohydrates from the stems. | ||
| 900 | |a In field experiments, low irradiance during post-flowering reduced grain yield, harvest index and grain oil content, and high R-FR ratio reaching the crop partially alleviated such effects. | ||
| 900 | |a We conclude that photomorphogenic signals are integrated early during the vegetative growth, and irradiance has stronger effects than R-FR signals at rapeseed crop level. | ||
| 900 | |a 2014 | ||
| 900 | |a AAG | ||
| 900 | |a 2014rondanini | ||
| 900 | |a http://ri.agro.uba.ar/files/intranet/articulo/2014rondanini.pdf | ||
| 900 | |a http://www.wiley.com/ | ||
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| 900 | |a BP | ||
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