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Título: | Sulphur accumulation after Verticillium dahliae infection of two pepper cultivars differing in degree of resistance |
Autor: | Novo, M.; Gayoso, C. M.; Pomar, F.; Lucas, M. Mercedes CSIC ORCID; Ros Barceló, Alfonso; Merino, F. | Palabras clave: | Capsicum annuum Cysteine Glutathione Sulphate Sulphur Vascular wilt |
Fecha de publicación: | 21-may-2009 | Serie: | Plant Pathology 56: 998-1004 (2007) |
Resumen: | Elemental sulphur levels, sulphur localization in stems, and levels of sulphate, glutathione and cysteine were studied in pepper ( Capsicum annuum ) cvs Yolo Wonder (higher resistance) and Luesia (lower resistance) after inoculation with Verticillium dahliae , the cause of vascular wilt. Accumulation of elemental sulphur (S 0 ) was first detected 10 days after inoculation in Yolo Wonder (mean S 0 level 7·3 μ g g –1 DW), and 15 days after inoculation in Luesia (mean S 0 level 3·3 μ g g –1 DW). The maximum level was reached 21 days after inoculation in Yolo Wonder (14·1 μ g g –1 DW). In control plants, elemental sulphur was not detected. SEM-EDX (scanning electron microscopy-energy dispersive X-ray microanalysis) indicated that the sulphur was not restricted to a specific location, but was dispersed throughout the vascular tissue. Sulphate levels showed a decline at the end of the experiment in inoculated plants, possibly related to the increase in sulphur levels seen in the two cultivars. The differences in sulphate levels between the two cultivars may be due to faster sulphate breakdown in cv. Yolo Wonder | Descripción: | 7 pages and figures | Versión del editor: | http://dx.doi.org/10.1111/j.1365-3059.2007.01683.x | URI: | http://hdl.handle.net/10261/13147 | DOI: | 10.1111/j.1365-3059.2007.01683.x | ISSN: | 0032-0862 |
Aparece en las colecciones: | (IRN) Artículos |
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Novo 2007 .pdf | 172,43 kB | Adobe PDF | Visualizar/Abrir |
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