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On the Cover: Focus Issue on Legume Biology

The center photo on the cover of this issue shows a variety of dried legume seeds, including pea (Pisum sativum), common bean (Phaseolus vulgaris), soybean (Glycine max), white lupin (Lupinus albus), and winged bean (Psophocarpus tetragonolobus). Legume seeds provide 33% to 40% of humankind�s dietary nitrogen requirements and 35% of the world�s processed vegetable oil. Genomic approaches are unlocking the secrets to how regulatory networks are interconnected to program legume seed development (see the Update by Le et al. [pp. 562–574] in this issue for details). TILLING, RNAi, positional cloning, and insertional mutagenesis are facilitating rapid progress in characterizing the functional role of legume genes. Surrounding the dried seeds (clockwise from upper left) are photographs of determinate root nodules from bean, flowers of common bean, seed pods, and leaves of barrel medic (Medicago truncatula), indeterminate root nodule (Medicago spp.), and leaves and flowers of Russell lupin (Lupinus polyphyllus). Photographs and cover image design by Bruna Bucciarelli and Carroll Vance.