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Seed-specific transcription factor HSFA9 links late embryogenesis and early photomorphogenesis

Opened Access Seed-specific transcription factor HSFA9 links late embryogenesis and early photomorphogenesis

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Autor: Prieto Dapena, María Del Pilar
Almoguera Antolinez, Concepcion
Personat, José María
Merchán Ignacio, Francisco
Departamento: Universidad de Sevilla. Departamento de Microbiología y Parasitología
Fecha: 2017
Publicado en: Journal of Experimental Botany, 68 (5), 1097-1108.
Tipo de documento: Artículo
Resumen: HSFA9 is a seed-specific transcription factor that in sunflower (Helianthus annuus) is involved in desiccation tolerance and longevity. Here we show that the constitutive overexpression of HSFA9 in tobacco (Nicotiana tabacum) seedlings attenuated hypocotyl growth under darkness and accelerated the initial photosynthetic development. Plants overexpressing HSFA9 increased accumulation of carotenoids, chlorophyllide, and chlorophyll, and displayed earlier unfolding of the cotyledons. HSFA9 enhanced phytochrome-dependent light responses, as shown by an intensified hypocotyl length reduction after treatments with continuous far-red or red light. This observation indicated the involvement of at least two phytochromes: PHYA and PHYB. Reduced hypocotyl length under darkness did not depend on phytochrome photo-activation; this was inferred from the lack of effect observed using far-red light pulses applied before the dark treatment. HSFA9 increased the expression of genes that activate photomo...
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Cita: Prieto Dapena, M.D.P., Almoguera Antolinez, C., Personat, J. y Merchán Ignacio, F. (2017). Seed-specific transcription factor HSFA9 links late embryogenesis and early photomorphogenesis. Journal of Experimental Botany, 68 (5), 1097-1108.
Tamaño: 3.394Mb
Formato: PDF

URI: http://hdl.handle.net/11441/61123

DOI: 10.1093/jxb/erx020

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