Am J Bot 2010 Oct 29;97(10):1664-87. Epub 2010 Sep 29.
Institut für Allgemeine Botanik, Johannes Gutenberg-Universität 55099 Mainz, Germany.
Premise Of The Study: Atripliceae (Chenopodiaceae), including Atriplex (300 spp.) as the largest genus of the family, are an ecologically important group of steppes and semideserts worldwide. Relationships in Atripliceae are poorly understood due to obscure and potentially convergent morphological characters. •
Methods: Using sequence variation of two chloroplast markers (rbcL gene, atpB-rbcL spacer) and one nrDNA marker (ITS) analyzed with BEAST, we investigated the systematics and biogeography of Atripliceae. We surveyed flower morphology and fruit anatomy to study the evolution of flowers and fruits in the tribe. •
Key Results: Female flowers with persistent foliar cover (the diagnostic character of traditional Atripliceae) evolved three times in Chenopodioideae, in Atripliceae s.s., Axyrideae, and Spinacia. Atripliceae s.s. started to diversify during the Early Miocene in Eurasia, separating into the Archiatriplex and the Atriplex clades. The former consists of eight species-poor, disjunct, and morphologically heterogeneous genera and is likely a relictual lineage. The Atriplex clade comprises the majority of species and evolved one C(4) lineage 14.1-10.5 Ma, which diversified rapidly worldwide. The C(4) Atriplex entered North America during the Middle/Late Miocene and spread to South America subsequently. Australia was colonized by two C(4) lineages both arriving during the Late Miocene. One of them diversified rapidly, giving rise to most Australian Atriplex species. •
Conclusions: Atripliceae s.s. comprise Archiatriplex, Atriplex, Exomis, Extriplex, Grayia, Halimione, Holmbergia, Manochlamys, Proatriplex, and Stutzia. Microgynoecium is included based on morphology but only weak molecular support. Axyris, Krascheninnikovia, and Ceratocarpus (here described as Axyrideae) and Spinacia are excluded from Atripliceae.
Revision der australischen und neuseeländischen Chenopodiaceen I Aellen et al. Theleophyton, Atriplex, Morrisiella, Blackiella, Senniella, Pachypharynx. Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 1937/1938
Halimione Aellen, eine rehabilitierte Chenopodiaceen-Gattung Aellen et al. Verhandlungen der Naturforschenden Gesellschaft in Basel 1938a
Die orientalischen Obione-Arten Aellen et al. Verhandlungen der Naturforschenden Gesellschaft in Basel 1938b
Die Atriplex-Arten des Orients Aellen et al. Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 1939a
Exomis und Manochlamys in Südafrika Aellen et al. Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 1939b
We have submitted your request - we will update you on status within the next 24 hours.
Sign up for further access to Scientific Publications and Authors!
What are PubFacts Points?
PubFacts points are rewards to PubFacts members, which allow you to better promote your profile and articles throughout PubFacts.com
How do I earn PubFacts Points?
Each member is given 50 PubFacts points upon signing up. You can earn additional points by completing 100% of your profile, creating and participating in discussions, and sharing other members research.
What can I do with PubFacts Points?
Currently, you can use PubFacts Points to promote and increase readership of your articles.