Home >> Taxon, Volume 60, Number 4

Molecular support for a basal grade of morphologically distinct, monotypic genera in the species-rich Vanguerieae alliance (Rubiaceae, Ixoroideae): Its systematic and conservation implications

Authors: Razafimandimbison, Sylvain G.1; Kainulainen, Kent2; Wong, Khoon M.3; Beaver, Katy4; Bremer, Birgitta1

Source: Taxon, Volume 60, Number 4, August 2011 , pp. 941-952(12)

Publisher: International Association for Plant Taxonomy

Buy & download fulltext article:

OR

Price: $16.36 plus tax (Refund Policy)

Abstract:

Many monotypic genera with unique apomorphic characters have been difficult to place in the morphology-based classifications of the coffee family (Rubiaceae). We rigorously assessed the subfamilial phylogenetic position and generic status of three enigmatic genera, the Seychellois Glionnetia, the Southeast Asian Jackiopsis, and the Chinese Trailliaedoxa within Rubiaceae, using sequence data of four plastid markers (ndhF, rbcL, rps16, trnT-F). The present study provides molecular phylogenetic support for positions of these genera in the subfamily Ixoroideae, and reveals the presence of a basal grade of morphologically distinct, monotypic genera (Crossopteryx, Jackiopsis, Scyphiphora, Trailliaedoxa, and Glionnetia, respectively) in the species-rich Vanguerieae alliance. These five genera may represent sole representatives of their respective lineages and therefore may carry unique genetic information. Their conservation status was assessed, applying the criteria set in IUCN Red List Categories. We consider Glionnetia and Jackiopsis Endangered. Scyphiphora is recognized as Near Threatened despite its extensive range and Crossopteryx as Least Concern. Trailliaedoxa is poorly known (Data Deficient). Finally, the generic status of Glionnetia, Jackiopsis, and Trailliaedoxa and the monogeneric tribe Jackieae as defined by Ridsdale are supported.

Keywords: CONSERVATION; CROSSOPTERYX; GLIONNETIA; JACKIOPSIS; MOLECULAR SYSTEMATICS; SCYPHIPHORA; TRAILLIAEDOXA

Document Type: Research article

Affiliations: 1: Bergius Foundation, Royal Swedish Academy of Sciences and Botany Department, Stockholm University, 10691 Stockholm, Sweden 2: Bergius Foundation, Royal Swedish Academy of Sciences and Botany Department, Stockholm University, 10691 Stockholm, Sweden; Department of Botany, Stockholm University, 10691, Stockholm, Sweden 3: Singapore Botanic Gardens, 1 Cluny Road, Singapore 259569 4: Plant Conservation Action Group, P.O. Box 392, Victoria, Mahé, Seychelles

Publication date: 2011-08-01

Related content
Marked list

Tools

Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content

Text size:

A | A | A | A
^ Back to top
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages. print icon Print this page