Focusing on Flowers

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Science  13 Feb 2009:
Vol. 323, Issue 5916, pp. 854
DOI: 10.1126/science.323.5916.854a

Transcription factors play many important roles in flowering plants, including the spatial and temporal regulation of highly conserved events in floral development. Urbanus et al. have mapped the localization of four such factors—AGAMOUS, SEPALLATA3, APETALA1, and FRUITFUL-that contain MADS domains and are associated with floral organ development in Arabidopsis. Their results show that gene expression patterns, as assessed by mRNA, are not fully correlated with protein expression, suggesting that these transcription factors are acting in a non-cell-autonomous manner. Furthermore, these data support the view that information gained via protein localization can be used in concert with mRNA measurements in analyzing developmental trajectories. — LMZ

BMC Plant Biol. 9, 5 (2009).

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