Evolutionary significance of a flat-leaved Pinus in Vietnamese rainforest.

The New Phytologist
Tim J Brodribb, Taylor S Feild

Abstract

Pines are generally absent from tropical rainforests. An important exception, Pinus krempfii, is a unique tree that bears flattened needles and competes with evergreen angiosperm trees in southern Vietnam. Here, the photosynthetic and hydraulic physiology of P. krempfii leaves were examined to determine whether this species departs from the widespread pattern of high-light-demanding photosynthetic physiology displayed in needle-leaved Pinus species. Maximum photosynthesis and light saturation of photosynthesis, as well as stem and leaf hydraulic efficiencies, were all very low in P. krempfii compared with other Pinus species. These characteristics were consistent with our observations of P. krempfii seedling regeneration under the forest canopy. By possessing shade tolerance coupled with the production of flattened leaves, P. krempfii has converged morphologically and physiologically with many genera of the southern hemisphere conifer family Podocarpaceae. This convergence extends to a key feature of leaf anatomy, the production of tubular sclereids in the leaf for radial transport of water from the vein to the margin. These observations suggest that few adaptive possibilities are open to conifers when moving into tropical rain...Continue Reading

References

Apr 25, 2000·International Journal of Plant Sciences·S M Ickert-Bond
Mar 26, 2003·Tree Physiology·Jarkko KoskelaDamrong Pipatwattanakul
Aug 13, 2003·Plant Physiology·Tim J Brodribb, N Michele Holbrook
Aug 18, 2004·Epidemiology and Infection·M EharaM Iwanaga
Feb 22, 2005·The New Phytologist·Tim J BrodribbBeatriz Palma
Apr 9, 2005·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·E Nic LughadhaP R Crane
Aug 11, 2006·Plant, Cell & Environment·Jarmila PittermannElzard H Sikkema
Sep 26, 2006·Molecular Biology and Evolution·Ann WillyardRichard Cronn
Nov 4, 2006·Plant, Cell & Environment·Tim J Brodribb, N Michele Holbrook
Jun 9, 2007·Plant Physiology·Tim J BrodribbGregory J Jordan

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Citations

Mar 28, 2009·Proceedings. Biological Sciences·C Kevin BoyceMaciej A Zwieniecki
Jun 18, 2010·Proceedings. Biological Sciences·C Kevin Boyce, Jung-Eun Lee
Jun 10, 2011·Proceedings. Biological Sciences·Ed BiffinAndrew J Lowe
Jul 14, 2011·Genetics·Christine E EdwardsCynthia Weinig
Jul 1, 2014·Ecology Letters·L AugustoA De Schrijver
Mar 1, 2009·American Journal of Botany·Vally LiakouraGeorge Karabourniotis
Mar 5, 2008·The New Phytologist·Chris Lusk
Oct 7, 2021·The New Phytologist·Santiago TruebaCraig Brodersen

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