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Derivation of ozone flux-yield relationships for lettuce: A key horticultural crop

Lookup NU author(s): Dr Eleni Goumenaki, Professor Jerry Barnes

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Abstract

Ozone flux-response relationships were derived for lettuce, employing a multiplicative approach to model the manner in which stomatal conductance is influenced by key environmental variables, using a dataset collected during field experimentation in Crete and yield-response relationships derived from parallel open-top chamber experiments. Regional agronomic practices were adopted throughout. Computed versus measured data revealed that the derived model explained 51% (P < 0.001) of the observed variation in stomatal conductance. Concentration-based indices were compared with flux-based indices. Analyses revealed a significant relationship between accumulated stomatal ozone flux and yield employing flux threshold cut-offs up to 4 nmol m-2 s-1. Regressions employing very low or zero flux thresholds resulted in the strongest yield-flux relationships (explaining ≈80% (P < 0.05) of the variation in the dataset). © 2006 Elsevier Ltd. All rights reserved.


Publication metadata

Author(s): Goumenaki E, Fernandez IG, Papanikolaou A, Papadopoulou D, Askianakis C, Kouvarakis G, Barnes J

Publication type: Article

Publication status: Published

Journal: Environmental Pollution

Year: 2007

Volume: 146

Issue: 3

Pages: 699-706

ISSN (print): 0269-7491

ISSN (electronic): 1873-6424

Publisher: Pergamon

URL: http://dx.doi.org/10.1016/j.envpol.2006.08.009

DOI: 10.1016/j.envpol.2006.08.009

PubMed id: 17055137


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