Phytochrome regulation of branching in arabidopsis
The red light:far-red light ratio perceived by phytochromes controls plastic traits of plant architecture, including branching. Despite the significance of branching for plant fitness and productivity, there is little quantitative and mechanistic information concerning phytochrome control of branchi...
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| Otros Autores: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Español |
| Materias: | |
| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2010Finlayson.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 245 | 1 | 0 | |a Phytochrome regulation of branching in arabidopsis |
| 520 | |a The red light:far-red light ratio perceived by phytochromes controls plastic traits of plant architecture, including branching. Despite the significance of branching for plant fitness and productivity, there is little quantitative and mechanistic information concerning phytochrome control of branching responses in Arabidopsis [Arabidopsis thaliana]. Here, we show that in Arabidopsis, the negative effects of the phytochrome B mutation and of low red light:far-red light ratio on branching were largely due to reduced bud outgrowth capacity and an increased degree of correlative inhibition acting on the buds rather than due to a reduced number of leaves and buds available for branching. Phytochrome effects on the degree of correlative inhibition required functional BRANCHED1 [BRC1], BRC2, AXR1, MORE AXILLARY GROWTH2 [MAX2], and MAX4. The analysis of gene expression in selected buds indicated that BRC1 and BRC2 are part of different gene networks. The BRC1 network is linked to the growth capacity of specific buds, while the BRC2 network is associated with coordination of growth among branches. We conclude that the branching integrators BRC1 and BRC2 are necessary for responses to phytochrome, but they contribute differentially to these responses, likely acting through divergent pathways. | ||
| 653 | 0 | |a PHYTOCHROME B | |
| 653 | 0 | |a ARABIDOPSIS | |
| 653 | 0 | |a GENE EXPRESSION PROFILING | |
| 653 | 0 | |a GENETICS | |
| 653 | 0 | |a MOLECULAR GENETICS | |
| 653 | 0 | |a MUTATION | |
| 653 | 0 | |a NUCLEOTIDE SEQUENCE | |
| 653 | 0 | |a PHYSIOLOGY | |
| 653 | 0 | |a PLANT GENE | |
| 653 | 0 | |a GENES, PLANT | |
| 653 | 0 | |a MOLECULAR SEQUENCE DATA | |
| 653 | 0 | |a ARABIDOPSIS THALIANA | |
| 700 | 1 | |a Finlayson, Scott A. |9 70211 | |
| 700 | 1 | |a Krishnareddy, Srirama R. |9 72052 | |
| 700 | 1 | |a Kebrom, Tesfamichael H. |9 72053 | |
| 700 | 1 | |9 792 |a Casal, Jorge José | |
| 773 | |t Plant Physiology |g Vol.152, no.4 (2010), p.1914-1927 | ||
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| 900 | |a ^aFinlayson^bS.A. | ||
| 900 | |a ^aKrishnareddy^bS.R. | ||
| 900 | |a ^aKebrom^bT.H. | ||
| 900 | |a ^aCasal^bJ.J. | ||
| 900 | |a ^aFinlayson^bS. A. | ||
| 900 | |a ^aKrishnareddy^bS. R. | ||
| 900 | |a ^aKebrom^bT. H. | ||
| 900 | |a ^aCasal^bJ. J. | ||
| 900 | |a ^aFinlayson^bS.A.^tDepartment of Soil and Crop Sciences, Texas A and M University, Texas AgriLife Research, College Station, TX 77843, United States | ||
| 900 | |a ^aKrishnareddy^bS.R.^tInstituto de Investigaciones Fisiológicas, Ecologicas Vinculadas a la Agricultura-Facultad de Agronomia, Universidad de Buenos Aires, Consejo Nacional de Investigaciones CientÃficas y Técnicas, 1417 Buenos Aires, Argentina | ||
| 900 | |a ^aKebrom^bT.H. | ||
| 900 | |a ^aCasal^bJ.J. | ||
| 900 | |a ^tPlant Physiology^cPlant Physiol. | ||
| 900 | |a eng | ||
| 900 | |a 1914 | ||
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| 900 | |a Vol. 152, no. 4 | ||
| 900 | |a 1927 | ||
| 900 | |a PHYTOCHROME B | ||
| 900 | |a ARABIDOPSIS | ||
| 900 | |a GENE EXPRESSION PROFILING | ||
| 900 | |a GENETICS | ||
| 900 | |a MOLECULAR GENETICS | ||
| 900 | |a MUTATION | ||
| 900 | |a NUCLEOTIDE SEQUENCE | ||
| 900 | |a PHYSIOLOGY | ||
| 900 | |a PLANT GENE | ||
| 900 | |a GENES, PLANT | ||
| 900 | |a MOLECULAR SEQUENCE DATA | ||
| 900 | |a ARABIDOPSIS THALIANA | ||
| 900 | |a The red light:far-red light ratio perceived by phytochromes controls plastic traits of plant architecture, including branching. Despite the significance of branching for plant fitness and productivity, there is little quantitative and mechanistic information concerning phytochrome control of branching responses in Arabidopsis [Arabidopsis thaliana]. Here, we show that in Arabidopsis, the negative effects of the phytochrome B mutation and of low red light:far-red light ratio on branching were largely due to reduced bud outgrowth capacity and an increased degree of correlative inhibition acting on the buds rather than due to a reduced number of leaves and buds available for branching. Phytochrome effects on the degree of correlative inhibition required functional BRANCHED1 [BRC1], BRC2, AXR1, MORE AXILLARY GROWTH2 [MAX2], and MAX4. The analysis of gene expression in selected buds indicated that BRC1 and BRC2 are part of different gene networks. The BRC1 network is linked to the growth capacity of specific buds, while the BRC2 network is associated with coordination of growth among branches. We conclude that the branching integrators BRC1 and BRC2 are necessary for responses to phytochrome, but they contribute differentially to these responses, likely acting through divergent pathways. | ||
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