awarded to a student who is the sole or senior author of a paper orally

Awarded to a student who is the sole or senior author

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awarded to a student who is the sole or senior author of a paper, orally presented in the Developmental and Structural Section or Paleobotanical Sections of the annual meeting, that best advances our understanding of the anatomy and/or morphology of vascular plants within an evolutionary context. 39
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1999 AWARD: No award was presented in 1999 because of the International Botanical Congress. 2000 COMMITTEE MEMBERSHIP: William Stein, SUNY, Binghamton (who will not be attending the meeting) Michael Frohlich, University of Michigan Larry Hufford, Washington State University, Chair. Submitted by: Larry Hufford, Chair, Maynard F. Moseley Award Committee Pelton Award Committee Annual Report, 2000 After a careful review of a set of strong nominations, the Pelton Award Committee of the Botanical Society of America has decided to give the year 2000 award to Prof. Ben Scheres. We ask the Conservation and Research Foundation to act on our recommendation for the Jeanette Siron Pelton Award in Plant Morphogenesis. BSA's Pelton Award Committee consists of Professors Lewis Feldman, Fred Sack (Committee Chair), and Michael Christiansen. Dr. Scheres is currently a full professor in The Department of Molecular Cell Biology, University of Utrecht, The Netherlands. He has made important, and even seminal, contributions to our understanding of root morphogenesis. Through the application of techniques such as laser ablation and enhancer traps, he has been able to study the role of cell lineage and the control of root development, especially in Arabidopsis . Two of his most significant accomplishments are described below. To address the idea that root patterning is set up and modified by the root meristem, Prof. Scheres has elegantly used lasers to ablate certain cells in lineages just behind the apex. He demonstrated that when a cell is ablated, that it is replaced by a cell from an adjacent lineage, the character of that cell is determined by signals coming from the basal portion of the root. This work thus suggests that pattern and cell specification in the root apex are influenced by acropetally moving signals, and is not solely determined by activities of the apical meristem. Prof. Scheres has also provided new, although controversial, views on the quiescent center, a population of cells in the root that appears to be composed of only 4 cells. Scheres has shown that the quiescent center keeps adjacent initial cells in an undifferentiated, mitotic state. If a quiescent center cell is destroyed, the contacting initial ceases dividing and differentiates into the cell type of the file of which the initial cell is part. This is a most significant finding since it provides for the first time evidence of a role for the quiescent center in root development.
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  • Fall '08
  • Finklerberg

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