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Table of Contents: May 2010

COVER

Cell size patterning in Arabidopsis flowers.

Image Credit: Adrienne Roeder (California Institute of Technology)
Issue Image

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.

Synopses

Sex on the Fly

Kira Heller

Essay

Unsolved Mystery

Perspective

Institutional Open Access Funds: Now Is the Time

Charles D. Eckman, Beth T. Weil

Book Review/Science in the Media

Primers

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

Most “Dark Matter” Transcripts Are Associated With Known Genes

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

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

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

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