M
Mark H. Harpster
Researcher at DNA Plant Technology
Publications - 13
Citations - 2148
Mark H. Harpster is an academic researcher from DNA Plant Technology. The author has contributed to research in topics: Ripening & Gene. The author has an hindex of 11, co-authored 13 publications receiving 2009 citations.
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Book ChapterDOI
Cell wall metabolism in fruit softening and quality and its manipulation in transgenic plants
TL;DR: Transgenic experiments show that ripening-related expansin protein abundance is directly correlated with fruit softening and has additional indirect effects on pectin depolymerization, showing that this protein is intimately involved in the softening process.
Journal ArticleDOI
Modification of Expansin Protein Abundance in Tomato Fruit Alters Softening and Cell Wall Polymer Metabolism during Ripening
David A. Brummell,Mark H. Harpster,Pedro Marcos Civello,Joseph M. Palys,Alan B. Bennett,Pamela Dunsmuir +5 more
TL;DR: Investigation of suppression and overexpression of Exp1 in transgenic tomato plants found fruit overexpressing high levels of recombinant Exp1 protein were much softer than controls, even in mature green fruit before ripening commenced, consistent with there being at least three components to fruit softening and textural changes.
Journal ArticleDOI
Differential expression of expansin gene family members during growth and ripening of tomato fruit.
TL;DR: The results indicate the presence of a large and complex expansin gene family in tomato, and suggest that while the expression of several expansin genes may contribute to green fruit development, only Exp1 mRNA is present at high levels during fruit ripening.
Journal ArticleDOI
Disease response to tobacco mosaic virus in transgenic tobacco plants that constitutively express the pathogenesis-related PR1b gene.
TL;DR: Transgenic plants derived from the cultivar Xanthi exhibited no delayed onset or reduction in the severity of systemic symptoms after TMV infection, and this data indicate that the PR1b protein of tobacco is not sufficient for TMV resistance, and imply that thePR1 proteins may not function as unique antiviral factors.
Journal ArticleDOI
Expression Analysis of a Ripening-Specific, Auxin-Repressed Endo-1,4-β-Glucanase Gene in Strawberry
TL;DR: Results indicate that strawberry Cel1 is a ripening-specific and auxin-repressed EGase, which is regulated during ripening by a decline in auxin levels originating from the achenes.