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Publication Type J
Authors Bohley, K., O. Joos, H. Hartmann, R. Sage, S. Liede-Schumann and G. Kadereit
Title Phylogeny of Sesuvioideae (Aizoaceae) - Biogeography, leaf anatomy and the evolution of C-4 photosynthesis
Source Perspectives in Plant Ecology Evolution and Systematics
Author Keywords Carbon isotope values Character evolution Kranz anatomy Sesuvium Trianthema Water storage tissue sesuvium-portulacastrum l single-cell c-4 c-3-c-4 intermediate plants caryophyllales kranz chenopodiaceae family forms dna
Abstract Sesuvioideae (Aizoaceae) form a small subfamily of drought-tolerant plants exhibiting leaf succulence, halophytic ecology, and the C-4 photosynthetic pathway. Sesuvioideae are sister to the species-rich subfamilies Ruschioideae, Mesembryanthemoideae and Aizooideae that contain many CAM lineages. This close relationship of CAM and C-4 taxa identifies the Sesuvioideae as an important clade to address hypotheses of photosynthetic pathway evolution. This study presents a molecular phylogeny of Sesuvioideae based on five markers (atpB-rbcL spacer, rps16 intron, trnL-trnF spacer, petB-petD spacer, ITS) and 51 accessions representing all genera and 37 species. We determined carbon isotope data of 103 samples and examined the leaf anatomy of 25 species. A RASP (Reconstruct Ancestral State in Phylogenies) analysis was used to reconstruct the ancestral biogeography of Sesuvioideae and trace its current worldwide distribution. Maximum likelihood character optimization was conducted for six traits related to photosynthetic type and leaf anatomy to characterize the evolution of leaf types in Sesuvioideae. The well-resolved molecular phylogeny revealed an African/Arabian origin of the subfamily with Tribulocarpus as sister to a clade containing Trianthema, Sesuvium, Cypselea and Zaleya. Intercontinental dispersal occurred within Trianthema (to Australia and South America) and Sesuvium/Zaleya (to Australia and North/Central America). Character optimizations favoured a single origin of C-4 photosynthesis with two reversions to the C-3 state, one within American Sesuvium and the other in Trianthema subgenus Trianthema. However, biochemical diversity of the C-4 syndrome in Sesuvioideae might indicate multiple origins of the C-4 pathway. Two C-3 and four C-4 anatomical types (atriplicoid, salsoloid, portulacelloid and pilosoid) are present in the subfamily, based on differences in water storage tissue, vascular bundle arrangements, and chlorenchyma structure. Ancestral state reconstruction indicates multiple losses or reduction of water storage tissue in the subfamily and frequent shifts in leaf anatomical traits. (C) 2015 Geobotanisches Institut ETH, Stiftung Ruebel. Published by Elsevier GmbH. All rights reserved.
Author Address [Bohley, Katharina; Joos, Olga; Kadereit, Gudrun] Johannes Gutenberg Univ Mainz, Inst Allgemeine & Spezielle Bot & Bot Garten, D-55099 Mainz, Germany. [Hartmann, Heidrun] Biozentrum Klein Flottbeck, DE-22609 Hamburg, Germany. [Liede-Schumann, Sigrid] Univ Bayreuth, Dept Plant Systemat, DE-95517 Bayreuth, Germany. [Sage, Rowan] Univ Toronto, Dept Ecol & Evolutionary Biol, Toronto, ON M5S 3B2, Canada. Kadereit, G (reprint author), Johannes Gutenberg Univ Mainz, Inst Allgemeine & Spezielle Bot & Bot Garten, D-55099 Mainz, Germany. clausing@uni-mainz.de
ISSN 1433-8319
ISBN 1433-8319
29-Character Source Abbreviation Perspect. Plant Ecol. Evol. Syst.
Year Published 2015
Volume 17
Issue 2
Beginning Page 116-130
Digital Object Identifier (DOI) 10.1016/j.ppees.2014.12.003
Unique Article Identifier WOS:000353087500004
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