1 / 22

Frederic Lens 1 , Mary E. Endress 2 , Pieter Baas 3, Steven Jansen 4 and Erik Smets 1,3

A search for phylogenetically informative wood characters in the subfamily Rauvolfioideae (Apocynaceae).

hasad
Download Presentation

Frederic Lens 1 , Mary E. Endress 2 , Pieter Baas 3, Steven Jansen 4 and Erik Smets 1,3

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A search for phylogenetically informative wood characters in the subfamily Rauvolfioideae (Apocynaceae) 1Laboratory of Plant Systematics, K.U.Leuven, Belgium; 2Institute of Systematic Botany, University of Zurich, Zollikerstrasse 107, 8008 Zürich, Switzerland; 3Nationaal Herbarium Nederland, Leiden branch, The Netherlands; 4Jodrell Laboratory, Royal Botanic Gardens Kew, Richmond, Surrey TW9 3DS, United Kingdom Frederic Lens1, Mary E. Endress2, Pieter Baas3, Steven Jansen4 and Erik Smets1,3

  2. Plumeria rubra Catharanthus roseus Vinca minor INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION • 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

  3. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Stemmadenia littoralis Allamanda schottii Carissa macrocarpa Cascabela thevetia

  4. Rauvolfioideae paraphyletic Simões et al. 2007: 5 chloroplast genes + morphology  climbing taxa APSA clade: -Apocynoideae -Periplocoideae -Secamonoideae -Asclepiadoideae

  5. INTRODUCTIONOBJECTIVES RESULTS DISCUSSION CONCLUSION • (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

  6. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Vesselgrouping

  7. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Vessel perforations, vessel pitting

  8. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Imperforate tracheary elements

  9. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Axial parenchyma distribution

  10. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Rays

  11. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Calcium oxalate crystals

  12. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Laticifers and intraxylary phloem

  13. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Diagnostic wood features within Tabernaemontaneae s.s. …

  14. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION … lead to recognition of the former tribe Ambelanieae

  15. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Climbing vs. nonclimbing genera in Willughbeieae Climbers Erect

  16. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Climbing vs. nonclimbing genera in Willughbeieae Climbers Erect

  17. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Aspidospermeae Vessel element length: — > 700 µm — 400-700 µm — < 400 µm Alstonieae Kopsia-Vinceae Vinceae Cli-Willughbeieae  Noncli-Willughbeieae Ambelanieae (Tabern s.l.) Tabernaemontaneae s.s. Diplorhynchus Melodineae  Alyxieae  Hunterieae Plumerieae Carisseae  climbing taxa Wright., Nerieae, Malouet. Periplocoideae  Remaining Apocynoideae  Baileyan trend! Secamonoideae  Asclepiadoideae 

  18. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Aspidospermeae Vessel grouping: — solitary vessels — radial multiples — clusters common Alstonieae Kopsia-Vinceae Vinceae Cli-Willughbeieae  Noncli-Willughbeieae Ambelanieae (Tabern s.l.) Tabernaemontaneae s.s. Diplorhynchus Melodineae  Alyxieae  Hunterieae Plumerieae Carisseae  climbing taxa Wright., Nerieae, Malouet. Periplocoideae  Remaining Apocynoideae  Secamonoideae  Asclepiadoideae 

  19. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Aspidospermeae Axial parenchyma: — excl apotracheal — apo- & paratracheal — excl paratracheal — absent Alstonieae Kopsia-Vinceae Vinceae Cli-Willughbeieae  Noncli-Willughbeieae Ambelanieae (Tabern s.l.) Tabernaemontaneae s.s. Diplorhynchus Melodineae  Alyxieae  Hunterieae Plumerieae Carisseae  climbing taxa Wright., Nerieae, Malouet. Periplocoideae  Remaining Apocynoideae  Secamonoideae  Asclepiadoideae 

  20. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Aspidospermeae No cells per axial parenchyma strand: — 8-10 — 4-8 — < 4 Alstonieae Kopsia-Vinceae Vinceae Cli-Willughbeieae  Noncli-Willughbeieae Ambelanieae (Tabern s.l.) Tabernaemontaneae s.s. Diplorhynchus Melodineae  Alyxieae  Hunterieae Plumerieae Carisseae  climbing taxa Wright., Nerieae, Malouet. Periplocoideae  Remaining Apocynoideae  Secamonoideae  Asclepiadoideae 

  21. INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION • 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

More Related