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Título : Improved resistance to controlled deterioration in transgenic seeds.
Autor : Prieto-Dapena, P. ; Castaño, Raúl; Almoguera, Concepción ; Jordano, Juan
Palabras clave : Heat-Shok Proteins
Stress Transcription Factors
Oryza-Sativa L.
Heat-Shock Proteins
Stress Transcription
Desication Tolerance
Arabidopsis-Thaliana
Abscisic acid (ABA)
Longevity
Expression
Thermotolerance
Embryogenesis
Fecha de publicación : 22-sep-2006
Editor: American Society of Plant Biologists
Citación : Plant Physiology 142:1102-1112 (2006)
Resumen: We show that seed-specific overexpression of the sunflower (Helianthus annuus) HaHSFA9 heat stress transcription factor (HSF) in tobacco (Nicotiana tabacum) enhances the accumulation of heat-shock proteins (HSPs). Among these proteins were HSP101 and a subset of the small HSPs (sHSPs), including proteins that accumulate only during embryogenesis in the absence of thermal stress. Levels of Late Embryogenesis Abundant proteins or seed oligosaccharides, however, were not affected. In the transgenic seeds, a high basal thermotolerance persisted during the early hours of imbibition. Transgenic seeds also showed significantly improved resistance to controlled deterioration in a stable and transgene-dependent manner. Furthermore, overexpression of HaHSFA9 did not have detrimental effects on plant growth or development, including seed morphology and total seed yield. Our results agree with previous work tentatively associating HSP gene expression with phenotypes important for seed longevity. These findings might have implications for improving seed longevity in economically important crops.
Descripción : This article has been evaluated in Faculty of 1000 Biology. ISSN 1740-4118
Versión del editor: http://www.plantphysiol.org/cgi/reprint/142/3/1102
URI : http://hdl.handle.net/10261/3341
DOI: 10.1104/pp.106.087817
ISBN : 0032-0889
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