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Floral development: Lip formation in orchids unravelled

Most orchid flowers have an enlarged median petal, the ‘lip’, which plays a crucial role in attracting pollinators. The existence and appearance of this organ is due to the presence of specific protein complexes involved in floral development, which are differentially expressed in orchid species with more or less pronounced lips.

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Figure 1: Flower of Ophrys splendida with Andrena male.

© JEAN CLAESSENS

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Correspondence to Barbara Gravendeel.

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Gravendeel, B., Dirks-Mulder, A. Floral development: Lip formation in orchids unravelled. Nature Plants 1, 15056 (2015). https://doi.org/10.1038/nplants.2015.56

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