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Anatomical constraints to nonstomatal diffusion conductance and photosynthesis in lycophytes and bryophytes

Citation

Carriqui, M and Roig-Oliver, M and Brodribb, TJ and Coopman, R and Gill, W and Mark, K and Niinemets, U and Perera-Castro, AV and Ribas-Carbo, M and Sack, L and Tosens, T and Waite, M and Flexas, J, Anatomical constraints to nonstomatal diffusion conductance and photosynthesis in lycophytes and bryophytes, New Phytologist, 222, (3) pp. 1256-1270. ISSN 0028-646X (2019) [Refereed Article]

Copyright Statement

Copyright 2019 The Authors Copyright 2019 New Phytologist Trust

DOI: doi:10.1111/nph.15675

Abstract

  • Photosynthesis in bryophytes and lycophytes has received less attention than terrestrial plant groups. In particular, few studies have addressed the nonstomatal diffusion conductance to CO2 gnsd of these plant groups.
  • Their lower photosynthetic rate per leaf mass area at any given nitrogen concentration compared with vascular plants suggested a stronger limitation by CO2 diffusion. We hypothesized that bryophyte and lycophyte photosynthesis is largely limited by low gnsd. Here, we studied CO2 diffusion inside the photosynthetic tissues and its relationships with photosynthesis and anatomical parameters in bryophyte and lycophyte species in Antarctica, Australia, Estonia, Hawaii and Spain.
  • On average, lycophytes and, specially, bryophytes had the lowest photosynthetic rates and nonstomatal diffusion conductance reported for terrestrial plants. These low values are related to their very thick cell walls and their low exposure of chloroplasts to cell perimeter.
  • We conclude that the reason why bryophytes lie at the lower end of the leaf economics spectrum is their strong nonstomatal diffusion conductance limitation to photosynthesis, which is driven by their specific anatomical characteristics.

Item Details

Item Type:Refereed Article
Keywords:bryophytes, cell wall, chloroplast, CO2 diffusion, lycophytes, nonstomatal diffusion conductance
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Biological Sciences
UTAS Author:Carriqui, M (Mr Marc Carriqui Alcover)
UTAS Author:Brodribb, TJ (Professor Tim Brodribb)
ID Code:134475
Year Published:2019
Web of Science® Times Cited:3
Deposited By:Plant Science
Deposited On:2019-08-14
Last Modified:2019-10-31
Downloads:0

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