frederic lens 1 , mary e. endress 2 , pieter baas 3, steven jansen 4 and erik smets 1,3
DESCRIPTION
A search for phylogenetically informative wood characters in the subfamily Rauvolfioideae (Apocynaceae). - PowerPoint PPT PresentationTRANSCRIPT
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11Laboratory of Plant Systematics, K.U.Leuven, Belgium; Laboratory of Plant Systematics, K.U.Leuven, Belgium; 22Institute of Systematic Institute of Systematic Botany, University of Zurich, Zollikerstrasse 107, 8008 Zürich, Switzerland; Botany, University of Zurich, Zollikerstrasse 107, 8008 Zürich, Switzerland; 33Nationaal Nationaal
Herbarium Nederland, Leiden branch, The NetherlandsHerbarium Nederland, Leiden branch, The Netherlands ; ; 44Jodrell Laboratory, Royal Jodrell Laboratory, Royal Botanic Gardens Kew, Richmond, Surrey TW9 3DS, United Kingdom Botanic Gardens Kew, Richmond, Surrey TW9 3DS, United Kingdom
A search for phylogenetically informative A search for phylogenetically informative wood characters in the subfamily wood characters in the subfamily
Rauvolfioideae (Apocynaceae)Rauvolfioideae (Apocynaceae)
Frederic LensFrederic Lens11, Mary E. Endress, Mary E. Endress22, Pieter Baas, Pieter Baas3, 3, Steven Steven JansenJansen44 and Erik Smets and Erik Smets1,31,3
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• Ca. 1000 spp., 84 genera, 10 tribes• Small to medium-sized trees, tropical lowland forests• Lianas in 24 genera, most diverse in Willughbeieae• Uniform flower morphology
– Traditional classifications based on seed and fruit characters
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
Plumeria rubra Catharanthus roseus Vinca minor
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INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
Carissa macrocarpa
Allamanda schottiiAllamanda schottiiStemmadenia littoralis
Cascabela thevetia
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Simões et al. 2007:
5 chloroplast genes + morphology
climbing taxa
Rauvolfioideae paraphyletic
APSA clade:
-Apocynoideae
-Periplocoideae
-Secamonoideae
-Asclepiadoideae
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• (1) Detailed wood anatomical descriptions– LM and SEM observations– 91 species, 50 genera, all 10 tribes– CTFw, Lw, MADw, SJRw, Tw, WAGw
• (2) Find meaningful wood features characterizing Rauvolfioideae tribes
• (3) Compare anatomy of climbers vs. nonclimbers
• (4) Unravel wood evolution within Apocynaceae
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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VesselVessel groupinggrouping
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
Vessel perforations, vessel pitting Vessel perforations, vessel pitting
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Imperforate tracheary elementsImperforate tracheary elements
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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Axial parenchyma distributionAxial parenchyma distributionINTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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RaysRays
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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Calcium oxalate crystalsCalcium oxalate crystals
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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Laticifers and intraxylary phloemLaticifers and intraxylary phloem
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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Diagnostic wood features within Tabernaemontaneae s.s. …Diagnostic wood features within Tabernaemontaneae s.s. …
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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… … lead to recognition of the former tribe Ambelanieaelead to recognition of the former tribe Ambelanieae
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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Climbing vs. nonclimbing genera in WillughbeieaeClimbing vs. nonclimbing genera in Willughbeieae
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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Climbing vs. nonclimbing genera in WillughbeieaeClimbing vs. nonclimbing genera in Willughbeieae
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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AspidospermeaeAlstonieaeKopsia-VinceaeVinceae
Noncli-Willughbeieae
Tabernaemontaneae s.s.DiplorhynchusMelodineaeAlyxieaeHunterieaePlumerieaeCarisseaeWright., Nerieae, Malouet.PeriplocoideaeRemaining ApocynoideaeSecamonoideae
Cli-Willughbeieae
Ambelanieae (Tabern s.l.)
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
Asclepiadoideae
Vessel element length:Vessel element length:
— > 700 µm
— 400-700 µm
— < 400 µm
climbing taxa
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Vessel grouping:Vessel grouping:
— solitary vessels
— radial multiples
— clusters common
AspidospermeaeAlstonieaeKopsia-VinceaeVinceae
Noncli-Willughbeieae
Tabernaemontaneae s.s.DiplorhynchusMelodineaeAlyxieaeHunterieaePlumerieaeCarisseaeWright., Nerieae, Malouet.PeriplocoideaeRemaining ApocynoideaeSecamonoideae
Cli-Willughbeieae
Ambelanieae (Tabern s.l.)
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
Asclepiadoideae
climbing taxa
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Axial parenchyma:Axial parenchyma:
— excl apotracheal
— apo- & paratracheal
— excl paratracheal
— absent
AspidospermeaeAlstonieaeKopsia-VinceaeVinceae
Noncli-Willughbeieae
Tabernaemontaneae s.s.DiplorhynchusMelodineaeAlyxieaeHunterieaePlumerieaeCarisseaeWright., Nerieae, Malouet.PeriplocoideaeRemaining ApocynoideaeSecamonoideae
Cli-Willughbeieae
Ambelanieae (Tabern s.l.)
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
Asclepiadoideae
climbing taxa
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No cells per axial No cells per axial parenchyma strand:parenchyma strand:
— 8-10
— 4-8
— < 4
AspidospermeaeAlstonieaeKopsia-VinceaeVinceae
Noncli-Willughbeieae
Tabernaemontaneae s.s.DiplorhynchusMelodineaeAlyxieaeHunterieaePlumerieaeCarisseaeWright., Nerieae, Malouet.PeriplocoideaeRemaining ApocynoideaeSecamonoideae
Cli-Willughbeieae
Ambelanieae (Tabern s.l.)
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
Asclepiadoideae
climbing taxa
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• Rauvolfioideae wood anatomically diverse• Typical wood characters for most tribes
– Vessel grouping, vessel element length– Number of cells per axial parenchyma strand– Fibre type
• Climbing vs. nonclimbing anatomy:– Paratracheal vs. apotracheal parenchyma– Tracheid presence vs. absence
• Some wood characters are diagnostic at the family level– E.g. Baileyan trend for vessel element length
INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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