About the Cover
On the Cover: Cell-cell communication is essential for proper development and physiological function. To characterize genes that function to coordinate later leaf development, a screen was performed to identify mutants that develop sectors with reduced chloroplast pigmentation that violate cell lineage boundaries in maize leaves. In this issue, Braun et al. (pp. 1511–1522) characterize the tie-dyed1 (tdy1) mutant that develops stable, nonclonal variegated leaf sectors. During sector formation, regions of leaf tissue hyperaccumulate photoassimilates and subsequently undergo chlorosis, suggesting that TDY1 regulates carbohydrate partitioning. The cover picture shows the phenotype of tdy1 in a genetic background in which anthocyanins accumulate exclusively in sectors with elevated carbohydrate levels. Cover photo by David Braun.
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Copyright © 2008 by the American Society of Plant Biologists
