The relative limitation of photosynthesis by mesophyll conductance in co-occurring species in a temperate rainforest dominated by the conifer Dacrydium cupressinum

Functional Plant Biology : FPB
Evan H De LuciaMichael J Clearwater

Abstract

The capacity to conduct CO2 from the intercellar spaces in leaves to the site of fixation (mesophyll conductance, gm) may pose a significant limitation to photosynthesis. Dacrydium cupressinum Sol. ex Lamb. (rimu), a native conifer of New Zealand, and other members of the Podocarpaceae evolved during the Jurassic when the partial pressure of CO2 exceeded 200 Pa. This species has low rates of photosynthesis and high levels of leaf nitrogen, which have led to the hypothesis that low gm restricts photosynthesis. Mesophyll conductance was estimated from gas-exchange and fluorescence measurements for this and other co-occurring tree species [Prumnopitys ferruginea D.Don (miro), Weinmannia racemosa L.f. (kāmahi), Meterosideros umbellata Cav. (rata)]. Pinus radiata D. Don (radiata pine) and Phaseolus vulgaris L. (bean) were included to provide comparisons with a rapidly growing tree and herbaceous plant with relatively high photosynthetic rates. Mesophyll conductance was not statistically different among indigenous tree species but was lowest for D. cupressinum. This species also had the lowest ratio of mesophyll to stomatal conductance, gm / gst and was the only species where the decline in partial pressure of CO2 was greater from th...Continue Reading

Citations

Mar 16, 2017·The New Phytologist·Yusuke OnodaMark Westoby
Apr 19, 2017·Journal of Experimental Botany·Linda-Liisa Veromann-JürgensonÜlo Niinemets
Dec 14, 2019·The Plant Journal : for Cell and Molecular Biology·Jaume Flexas, Marc Carriquí
Mar 12, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Rosangela CatoniMirko U Granata
Apr 28, 2009·Journal of Experimental Botany·Ulo NiinemetsCharles R Warren
May 1, 2013·Functional Plant Biology : FPB·Luzhen ChenWenqing Wang
Feb 1, 2008·Functional Plant Biology : FPB·Maki KatsuharaMasayoshi Maeshima
May 11, 2011·Plant, Cell & Environment·Nerea Ubierna, John D Marshall
Jan 29, 2008·Oecologia·Ulli SeibtJoseph A Berry
Aug 28, 2020·Biological Research·Suliman A Al-KhateebAkbar S Mohmand
Nov 13, 2007·Plant, Cell & Environment·Jaume FlexasHipólito Medrano
Nov 23, 2020·The New Phytologist·Pauliina Schiestl-AaltoAnnikki Mäkelä

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