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Anatomical constraints to nonstomatal diffusion conductance and photosynthesis in lycophytes and bryophytes
journal contribution
posted on 2023-05-20, 06:22 authored by Marc Carriqui Alcover, Roig-Oliver, M, Timothy BrodribbTimothy Brodribb, Coopman, R, Gill, W, Mark, K, Niinemets, U, Perera-Castro, AV, Ribas-Carbo, M, Sack, L, Tosens, T, Waite, M, Flexas, J- 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.
History
Publication title
New PhytologistVolume
222Pagination
1256-1270ISSN
0028-646XDepartment/School
School of Natural SciencesPublisher
Blackwell Publishing LtdPlace of publication
9600 Garsington Rd, Oxford, England, Oxon, Ox4 2DgRights statement
Copyright 2019 The Authors Copyright 2019 New Phytologist TrustRepository Status
- Restricted
