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Ovule ontogeny in Rubiaceae (Juss.): Chomelia obtusa (Cinchonoideae–Guettardeae) and Ixora coccinea (Ixoroideae–Ixoreae)

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Summary

Ovule development and gynosporogenesis (megasporogenesis) of two Rubiaceae, Chomelia obtusa (Cinchonoideae–Guettardeae) and Ixora coccinea (Ixoroideae–Ixoreae) were studied. Based on the new results it is proposed that the Ixora type’ of ovule development is established because of the convex nucellus and the presence of several archesporial cells. This result supports the close relationships of Cinchonoideae and Ixoroideae established by molecular systematic studies.

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Authors and Affiliations

  1. Rio de Janeiro Botanical Garden, Rio de Janeiro, Brazil

    K. L. G. De Toni

  2. Department of Botany, Biosciences Institute, Federal University of Rio Grande do Sul, Porto Alegre, Brazil

    J. E. A. Mariath

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  1. K. L. G. De Toni
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  2. J. E. A. Mariath
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Correspondence to K. L. G. De Toni.

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De Toni, K.L.G., Mariath, J.E.A. Ovule ontogeny in Rubiaceae (Juss.): Chomelia obtusa (Cinchonoideae–Guettardeae) and Ixora coccinea (Ixoroideae–Ixoreae). Plant Syst Evol 272, 39–48 (2008). https://doi.org/10.1007/s00606-007-0635-x

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  • DOI: https://doi.org/10.1007/s00606-007-0635-x

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