Exile Vol. XXVII No. 1

ANDY ACKER: Four Lane Breakfast 30 MIKE AUGUSTA: The Store 25-27 J. L. FREEMAN: Bobbie 22 Poem 33 JENNIFER E. GARDNER: Photo 3 Deeds Field 9 Photo 21 Photo 23 Photo 24 LAURA GILBERT: Photo 13 Photo 28 Photo 29 Photo 31 Photo 36 KATE GLAZER: Drawing 14 MICHAEL HEINLIN: Reflections 19 DAVE HOGSHIRE: The Life And Times Of General Worm 29 CHAD HUSSEY: Waiting for Anne Sexton 13 JOHN WHITWORTH KROPF: Friends in the Park 30 DANE LAVIN: Story 4-8 LISA LAWRENCE: Poem 17 The Man With The Red Hat 15 JAMES LUNDY: Bonds 10 Photo 30 Photo 34 Twisted Ulna 11 LISA MEAD: Resistance 9 LISA MINACCI: The Drop 33 A. PENCE: The Minstrels 1 Mussels 33 PENELOPE A. RISEBOROUGH: Poem 2 Regent Street Mannequins 2 RICK RORICK: Photo 18 A. K. SESSIONS Nervious Tension 10 SUZIE SNYDER: Photo 16 L. S. VIOLA: Trash Can JOHN ZARCHEN: In Autumn 20 ANONYMOUS: Untitled Article 32 Sandymount Strand 35 Cover drawing by Kate Glaze

Embryogenesis: Pattern Formation from a Single Cell

During embryogenesis a single cell gives rise to a functional multicellular organism. In higher plants, as in many other multicellular systems, essential architectural features, such as body axes and major tissue layers are established early in embryogenesis and serve as a positional framework for subsequent pattern elaboration. In Arabidopsis, the apicalbasal axis and the radial pattern of tissues wrapped around it are already recognizable in young embryos of only about a hundred cells in size. This early axial pattern seems to provide a coordinate system for the embryonic initiation of shoot and root. Findings from genetic studies in Arabidopsis are revealing molecular mechanisms underlying the initial establishment of the axial core pattern and its subsequent elaboration into functional shoots and roots. The genetic programs operating in the early embryo organize functional cell patterns rapidly and reproducibly from minimal cell numbers. Understanding their molecular details could therefore greatly expand our ability to generate plant body patterns de novo, with important implications for plant breeding and biotechnology