Turning over a new 'leaf': multiple functional significances of leaves versus phyllodes in Hawaiian Acacia koa

Plant, Cell & Environment
Jessica Pasquet-KokLawren Sack

Abstract

Hawaiian endemic tree Acacia koa is a model for heteroblasty with bipinnately compound leaves and phyllodes. Previous studies suggested three hypotheses for their functional differentiation: an advantage of leaves for early growth or shade tolerance, and an advantage of phyllodes for drought tolerance. We tested the ability of these hypotheses to explain differences between leaf types for potted plants in 104 physiological and morphological traits, including gas exchange, structure and composition, hydraulic conductance, and responses to varying light, intercellular CO(2) , vapour pressure deficit (VPD) and drought. Leaf types were similar in numerous traits including stomatal pore area per leaf area, leaf area-based gas exchange rates and cuticular conductance. Each hypothesis was directly supported by key differences in function. Leaves had higher mass-based gas exchange rates, while the water storage tissue in phyllodes contributed to greater capacitance per area; phyllodes also showed stronger stomatal closure at high VPD, and higher maximum hydraulic conductance per area, with stronger decline during desiccation and recovery with rehydration. While no single hypothesis completely explained the differences between leaf type...Continue Reading

References

Oct 16, 2002·Journal of Experimental Botany·Lawren SackN Michele Holbrook
Sep 25, 2003·Journal of Experimental Botany·Patrizia TrifilòSebastiano Salleo
Apr 23, 2004·Nature·Ian J WrightRafael Villar
May 4, 2006·Annual Review of Plant Biology·Lawren Sack, N Michele Holbrook
Jun 20, 2006·Proceedings of the National Academy of Sciences of the United States of America·Joshua H GoldsteinPeter Vitousek
Nov 4, 2006·Plant, Cell & Environment·Tim J Brodribb, N Michele Holbrook
Nov 8, 2006·Plant, Cell & Environment·Julia E PowlesGraham D Farquhar
Nov 23, 2006·Plant Physiology·Peter J Franks, Graham D Farquhar
Jan 9, 2008·The New Phytologist·Tim J Brodribb, Taylor S Feild
Jan 30, 2008·Proceedings of the National Academy of Sciences of the United States of America·Lawren SackN Michele Holbrook
Apr 29, 2008·Trends in Ecology & Evolution·Christopher H LuskJeannine Cavender-Bares
Aug 22, 2008·The New Phytologist·R Brandon PrattH Jochen Schenk
Aug 27, 2009·Photochemistry and Photobiology·Michael A Forster, Stephen P Bonser
Jun 1, 2006·American Journal of Botany·Lawren SackTyler Pardee
May 1, 2006·Functional Plant Biology : FPB·Eric L Kruger, John C Volin
Jun 1, 2004·The New Phytologist·Tim J Brodribb, N Michele Holbrook

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Citations

Jan 11, 2012·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Colin P Osborne, Lawren Sack
Sep 20, 2011·Plant, Cell & Environment·Katy E SommervilleMarilyn C Ball
Sep 28, 2013·American Journal of Botany·Grace P JohnLawren Sack
Aug 28, 2012·American Journal of Botany·Jaroslav DurkovicViliam Pichler
Oct 29, 2018·American Journal of Botany·Leila R FletcherLawren Sack
Jun 22, 2019·Annals of Botany·Kyle M E RoseDouglass F Jacobs
Dec 12, 2019·Integrative and Comparative Biology·Lawren Sack, Thomas N Buckley
Aug 1, 2019·Nature Communications·Christian HenryLawren Sack
Jul 1, 2011·Functional Plant Biology : FPB·Adrienne B NicotraHirokazu Tsukaya

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