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Revista Chapingo serie ciencias forestales y del ambiente
On-line version ISSN 2007-4018Print version ISSN 2007-3828
Abstract
GRANADOS GARCIA, María E. et al. Effect of light and soil moisture on physiological variables in six Mediterranean forest species planted under a pine forest canopy. Rev. Chapingo ser. cienc. for. ambient [online]. 2019, vol.25, n.3, pp.461-476. Epub Feb 19, 2021. ISSN 2007-4018. https://doi.org/10.5154/r.rchscfa.2018.12.090.
Introduction:
Resprouter species, by regenerating rapidly, can maintain an optimal carbon balance and improve the resilience of ecosystems that have been disturbed or are at high risk of fire.
Objective:
To assess the effect of light availability and soil moisture on the ecophysiological variables of six resprouter species planted under cover of Pinus halepensis Mill.
Materials and methods:
Arbutus unedo L., Rhamnus alaternus L., Quercus ilex L., Quercus faginea Lam., Fraxinus ornus L. and Acer granatense Boiss. were planted in plots with three pine densities per hectare: HD = 800 to 1 100, MD = 300 to 600 and LD = 100 to 250. The species were also grown in the nursery, trying to maintain the same solar radiation conditions. Photosynthesis (A), stomatal conductance (Gs), photosystem II maximum efficiency (Fv/Fm) and water use efficiency (IWUE) were measured.
Results and discussion:
Evergreen sclerophyll species (A. unedo, R. alaternus and Q. ilex) showed higher photosynthetic capacity, lower photoinhibition and lower IWUE than deciduous species. In HD, plants showed lower photosynthetic capacity (P < 0.01) and higher photoprotection (P < 0.001). The IWUE was similar under the three pine forest densities. In the nursery, A was high under 100 % and 50 % light conditions; Gs was higher under 20 % conditions; and IWUE was high under 100 % light.
Conclusion:
The physiological variables of the species were conditioned by shading and changes in water demand produced by tree cover.
Keywords : water use efficiency; photoprotection; photosynthesis; stomatal conductance; pine density.