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Draft Genome Sequence of Mentha Iongifolia and Development of Resources for Mint Cultivar Improvement

Molecular Plant 2017年第2期10卷 323-339页

作者： Kelly J. Vining Sean R. Johnson Amirhossein Ahkami Iris Lange Amber N. Parrish Susan C. Trapp Rodney B. Croteau Shannon C.K. Straub iovanna pandelova B. Markus Lange Department of Horticulture Oregon State University Corvallis OR 97331 USA M. J. Murdock Metabolomics Laboratory Institute of Biological Chemistry Washington State University Pullman WA 99164-6340 USA Department of Biology Hobart and William Smith Colleges Geneva NY 14456 USA Present address: Pacific Northwest National Laboratory Environmental Molecular Sciences Laboratory (EMSL) Richiand WA 99354 USA Present address: Medifluidics Inc. Fort Collins. CO 80525 USA

The genus Mentha encompasses mint species cultivated for their essential oils, which are formulated into a vast array of consumer products. Desirable oil characteristics and resistance to the fungal disease Verti- cillium wilt are top priorities for the mint industry. However, cultivated mints have complex polyploid ge- homes and are sterile. Breeding efforts, therefore, require the development of genomic resources for fertile mint species. Here, we present draft de novo genome and plastome assemblies for a wilt-resistant South African accession of Mentha Iongifolia （L.） Huds., a diploid species ancestral to cultivated peppermint and spearmint. The 353 Mb genome contains 35 597 predicted protein-coding genes, including 292 disease resistance gene homologs, and nine genes determining essential oil characteristics. A genetic linkage map ordered 1397 genome scaffolds on 12 pseudochromosomes. More than two million simple sequence repeats were identified, which will facilitate molecular marker development. The M. Iongifolia genome is a valuable resource for both metabolic engineering and molecular breeding. This is exemplified by employing the genome sequence to clone and functionally characterize the promoters in a peppermint cultivar, and demonstrating the utility of a glandular trichome-specific promoter to increase expression of a biosynthetic gene, thereby modulating essential oil composition.

关键词： aromatic plant essential oil genome mint Verticillium wilt

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Analysis of Transcriptome Changes Induced by Ptr ToxA in Wheat Provides Insights into the Mechanisms of Plant Susceptibility

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Molecular Plant 2009年第5期2卷 1067-1083页

作者： iovanna pandelova Melania F. Betts Viola A. Manning Larry J. Wilhelm Todd C. Mockler Lynda M. Ciuffetti Department of Botany and Plant Pathology and Center for Genome Research and Biocomputing Oregon State University Corvallis OR 97331 USA

To obtain greater insight into the molecular events underlying plant disease susceptibility, we studied transcriptome changes induced by a host-selective toxin of Pyrenophora tritici-repentis, Ptr ToxA （ToxA）, on its host plant, wheat. Transcriptional profiling of ToxA-treated leaves of a ToxA-sensitive wheat cultivar was performed using the GeneChip Wheat Genome Array. An improved and up-to-date annotation of the wheat microarray was generated and a new tool for array data analysis （BRAT） was developed, and both are available for public use via a web-based interface. Our data indicate that massive transcriptional reprogramming occurs due to ToxA treatment, including cellular responses typically associated with defense. In addition, this study supports previous results indicating that ToxA-induced cell death is triggered by impairment of the photosynthetic machinery and accumulation of reactive oxygen species. Based on results of this study, we propose that ToxA acts as both an elicitor and a virulence factor.

关键词： Gene expression transcriptome analysis defense responses fungal pathogenesis plant-microbe interactions host-selective toxin.

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