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Free Content Getting to the root of plant biology: impact of the Arabidopsis genome sequence on root research

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Prior to the availability of the genome sequence, the root of Arabidopsis had attracted a small but ardent group of researchers drawn to its accessibility and developmental simplicity. Roots are easily observed when grown on the surface of nutrient agar media, facilitating analysis of responses to stimuli such as gravity and touch. Developmental biologists were attracted to the simple radial organization of primary root tissues, which form a series of concentric cylinders around the central vascular tissue. Equally attractive was the mode of propagation, with stem cells at the tip giving rise to progeny that were confined to cell files. These properties of root development reduced the normal four-dimensional problem of development (three spatial dimensions and time) to a two-dimensional problem, with cell type on the radial axis and developmental time along the longitudinal axis. The availability of the complete Arabidopsis genome sequence has dramatically accelerated traditional genetic research on root biology, and has also enabled entirely new experimental strategies to be applied. Here we review examples of the ways in which availability of the Arabidopsis genome sequence has enhanced progress in understanding root biology.
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Keywords: Arabidopsis; development; genetics; genomics; root biology; transcriptome

Document Type: Research Article

Affiliations: 1: Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Nottingham, UK 2: Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, USA

Publication date: March 1, 2010

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