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Regulating flowering across time

Flowers of some dicot plants, such as Arabidopsis and Antirrhinum, look very different from those of certain monocot species, such as the grasses – the grasses, for example, do not have sepal- or petal-like structures. So has the transcriptional network that regulates flower development been conserved since monocots and dicots diverged 150 million years ago? To investigate this, John Doebley and co-workers used insertional mutagenesis to disrupt the zfl1 and zfl2 genes in maize, which are homologues of the FLORICAULA (FLO) and LEAFY (LFY) genes in Antirrhinum and Arabidopsis, respectively. FLO and LFY are regulators of the ABC floral organ identity genes, and Doebley and colleagues surprisingly found (see p. 2385) that zfl1 and zfl2 do indeed share conserved roles with these dicot counterparts (despite their evolutionary distance), as zfl1/zfl2 double mutants have disrupted floral organ identity and fail to form normal reproductive structures.

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Duplicate FLORICAULA/LEAFY homologs zfl1 and zfl2 control inflorescence architecture and flower patterning in maize

Kirsten Bomblies, Rong-Lin Wang, Barbara A. Ambrose, Robert J. Schmidt, Robert B. Meeley, and John Doebley
Development 2003 130: 2385-2395. [Abstract] [Full Text]  

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Related articles in Development Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Search for Related Content Social Bookmarking                         What's this?