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Table of Contents: May 2010

A confocal projection of the cluster of flowers surrounding the growing tip of Arabidopsis shows the formation of cells with a large range of sizes on the sepals of the developing flowers. The variable decisions of cells on the outer surface of the sepals, concerning division time and when to stop dividing, create this characteristic pattern (see Roeder et al., e1000367). Cell nuclei and plasma membranes are shown in green; chloroplasts are in red for contrast. The pattern develops progressively from the youngest flowers near the center to the older flowers on the periphery.

Image Credit: Adrienne Roeder (California Institute of Technology)

Unsolved Mysteries

Perspectives

Institutional Open Access Funds: Now Is the Time

Charles D. Eckman, Beth T. Weil

Book Reviews/Science in the Media

Evolution Is a Quantitative Science

John F. Y. Brookfield

Research Articles

Spatial Pattern Enhances Ecosystem Functioning in an African Savanna

Robert M. Pringle, Daniel F. Doak, Alison K. Brody, Rudy Jocqué, Todd M. Palmer

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Insulin Signaling and Dietary Restriction Differentially Influence the Decline of Learning and Memory with Age

Amanda L. Kauffman, Jasmine M. Ashraf, M. Ryan Corces-Zimmerman, Jessica N. Landis, Coleen T. Murphy

Directing Astroglia from the Cerebral Cortex into Subtype Specific Functional Neurons

Christophe Heinrich, Robert Blum, Sergio Gascón, Giacomo Masserdotti, Pratibha Tripathi, Rodrigo Sánchez, Steffen Tiedt, Timm Schroeder, Magdalena Götz, Benedikt Berninger

Variability in the Control of Cell Division Underlies Sepal Epidermal Patterning in Arabidopsis thaliana

Adrienne H. K. Roeder, Vijay Chickarmane, Alexandre Cunha, Boguslaw Obara, B. S. Manjunath, Elliot M. Meyerowitz

Tec1 Mediates the Pheromone Response of the White Phenotype of Candida albicans: Insights into the Evolution of New Signal Transduction Pathways

Nidhi Sahni, Song Yi, Karla J. Daniels, Guanghua Huang, Thyagarajan Srikantha, David R. Soll

Sex and the Single Cell. II. There Is a Time and Place for Sex

Carmen C. Robinett, Alexander G. Vaughan, Jon-Michael Knapp, Bruce S. Baker

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Most “Dark Matter” Transcripts Are Associated With Known Genes

Harm van Bakel, Corey Nislow, Benjamin J. Blencowe, Timothy R. Hughes

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A Large Fraction of Extragenic RNA Pol II Transcription Sites Overlap Enhancers

Francesca De Santa, Iros Barozzi, Flore Mietton, Serena Ghisletti, Sara Polletti, Betsabeh Khoramian Tusi, Heiko Muller, Jiannis Ragoussis, Chia-Lin Wei, Gioacchino Natoli