Analysis of mesophyll conductance in five understory herbaceous species.

Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology
Rosangela CatoniMirko U Granata

Abstract

Mesophyll conductance (g m) has received over time much less attention than stomatal conductance (g s), although it affects leaf photosynthesis to about the same extent as stomatal conductance does. The objective of this study was to analyze the g m trend in five understory herbaceous species growing in a close-canopy forest in the north-west of Italy. In particular, three of analyzed species were monocots: Carex brizoides Lam., Carex pilosa Scop., and Oplismenus undulatifolius P. Beauv and the others dicots species: Circaea lutetiana L., and Pulmonaria officinalis Ced. The results showed, on one hand, the absence of correlation between g m and the considered environmental variables in the forest understory (i.e. air temperature, photosynthetic photon flux density and carbon dioxide concentration). Moreover, we carried out a principal component analysis considering all the analyzed morphological and physiological variables for the five species. The following correlation between the first component, related to the leaf mass per unit of leaf area and the leaf tissue density, and g m seem to suggest a key role of the leaf structural features in determining g m variations across the five species.

References

Nov 15, 2002·Journal of Experimental Botany·Clément PielBernard Genty
Aug 1, 1989·Plant Physiology·G Bongi, F Loreto
Jul 10, 2007·Plant, Cell & Environment·Antonio Diaz-EspejoJosé Enrique Fernández
Nov 13, 2007·Plant, Cell & Environment·Jaume FlexasHipólito Medrano
Mar 4, 2009·Journal of Experimental Botany·Youshi TazoeJohn R Evans
Mar 17, 2009·Journal of Experimental Botany·Foteini HassiotouJohn R Evans
Jul 17, 2012·Plant Science : an International Journal of Experimental Plant Biology·Jaume FlexasCharles R Warren

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