New species ofRelbunium (Rubiaceae) from Brazil, with notes on flavonoid and peroxidase patterns

Carpel and ovule ontogeny, gynosporogenesis and gynogametogenesis in species of Relbunium were studied in order to provide additional data distinguishing evolutionary embryological characters. No significant differences in either ontogeny or morphology were observed among the species. The following characteristics are common to all species studied: (1) an independent development between the establishment of carpels and placenta meristem; (2) a bi-layered structure of the ovule primordia; and (3) a remnant gynosporium of the ovules, which contains the gynospores and binucleated gametophytes that migrate towards the micropyle where their development is concluded. The embryological characters are explored, and additional data are provided for the analyses of the evolutionary tendencies to Relbunium (Endl.) Benth. & Hook. f. species. In accordance with previous evolutionary proposals, the analysed species can be compared with the Galium type.

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Ovule ontogeny of Relbunium species in the evolutionary context of Rubiaceae

Toni

Mariath

2010

Aust. J. Bot.

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Remembering the past – studies on evolution done by the genetics group at Universidade Federal do Rio Grande do Sul (UFRGS)

Salzano

2018

Genet. Mol. Biol.

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After a brief introduction about the factors that are involved in science development, and world and Brazilian evolutionary genetics, the studies developed in Porto Alegre in this area were reviewed. Four periods in the development of this group were distinguished: (a) Origins and first expansion (1949-1961); (b) Second expansion (1962-1988); (c) Third expansion (1989-2001); and (d) The last 15 years (2002-present). The international Porto Alegre Biological Evolution Workshops (PABEWs), with five biannual events from 2007 o 2015, were also mentioned. The final message stressed the importance of the maintenance of this and other Brazilian groups of research through adequate finance and recognition.

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Developmental Anatomy and Morphology of the Flowers and Fruits of Species fromGaliumandRelbunium(Rubieae, Rubiaceae)¹

Toni¹,

Mariath²

2011

Annals of the Missouri Botanical Garden

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New species ofRelbunium (Rubiaceae) from Brazil, with notes on flavonoid and peroxidase patterns

Cited by 4 publications

References 2 publications

Ovule ontogeny of Relbunium species in the evolutionary context of Rubiaceae

Ovule ontogeny of Relbunium species in the evolutionary context of Rubiaceae

Remembering the past – studies on evolution done by the genetics group at Universidade Federal do Rio Grande do Sul (UFRGS)

Developmental Anatomy and Morphology of the Flowers and Fruits of Species fromGaliumandRelbunium(Rubieae, Rubiaceae)¹

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New species ofRelbunium (Rubiaceae) from Brazil, with notes on flavonoid and peroxidase patterns

Cited by 4 publications

References 2 publications

Ovule ontogeny of Relbunium species in the evolutionary context of Rubiaceae

Ovule ontogeny of Relbunium species in the evolutionary context of Rubiaceae

Remembering the past – studies on evolution done by the genetics group at Universidade Federal do Rio Grande do Sul (UFRGS)

Developmental Anatomy and Morphology of the Flowers and Fruits of Species fromGaliumandRelbunium(Rubieae, Rubiaceae)1

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Developmental Anatomy and Morphology of the Flowers and Fruits of Species fromGaliumandRelbunium(Rubieae, Rubiaceae)¹