Long Chain Alkanes in Silk Extracts of Maize Genotypes with Varying Resistance to Fusarium graminearum

The alkane content of the silks of nine maize genotypes was analyzed to investigate the role of silk wax in resistance to Fusarium graminearum. Silk samples were collected 2, 4, 6, and 8 days after silk emergence and divided into three sections: exposed silk, silk channel silk, and silk that is und...

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Bibliographic Details
Published in:	Journal of agricultural and food chemistry Vol. 51; no. 23; pp. 6702 - 6708
Main Authors:	Miller, S. Shea, Reid, Lana M, Butler, Gail, Winter, Susan P, McGoldrick, Nadia J
Format:	Journal Article
Language:	English
Published:	Washington, DC American Chemical Society 05-11-2003
Subjects:	Alkanes - analysis Biological and medical sciences Fundamental and applied biological sciences. Psychology Fungal plant pathogens Fusarium Fusarium graminearum Genotype Pathology, epidemiology, host-fungus relationships. Damages, economic importance Phytopathology. Animal pests. Plant and forest protection Plant Diseases - genetics Plant Diseases - microbiology Plant Extracts - chemistry Plant Structures - chemistry Zea mays - chemistry Zea mays - genetics Zea mays - microbiology Agronomic character Monocotyledones Plant pathogen corn Alkanes Cereal crop Fungi Disease resistance Gramineae Angiospermae Alkane Fusarium Chemical composition Fungi Imperfecti Intraspecific comparison Thallophyta silk Zea mays Fusarium graminearum Long chain Host agent relation maize Fungus resistance Infection Sensitivity resistance Defense mechanism Spermatophyta Inbred
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Summary:	The alkane content of the silks of nine maize genotypes was analyzed to investigate the role of silk wax in resistance to Fusarium graminearum. Silk samples were collected 2, 4, 6, and 8 days after silk emergence and divided into three sections: exposed silk, silk channel silk, and silk that is under the husk and overlying the kernels. Four major unbranched alkanes (C25, C27, C29, and C31) and three isoalkanes (C27i, C29i, and C31i) were identified. Total alkane contents were highest in the exposed silk followed by the silk channel silk, with the lowest in the youngest silk closest to the kernels. In the silk channel and overlying kernel silks, the moderately resistant inbred CO272 consistently had the highest alkane content. None of the other inbreds with improved resistance had as high a level of alkanes as CO272, indicating that alkane content is not a major mechanism of resistance. Keywords: Alkanes; maize; corn; silk; Fusarium
Bibliography:	ark:/67375/TPS-7QGDMX78-G istex:E2058021C535C389142DED6A4361372E81D907CB ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2
ISSN:	0021-8561 1520-5118
DOI:	10.1021/jf0341363