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vol.39 issue5STUDY OF THERMAL PROFILE OF "CAIPIRA" TYPE FURNACES USED BY THE RED CERAMIC INDUSTRY IN PARELHAS, SERIDÓ REGION, RN author indexsubject indexarticles search
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Revista Árvore

Print version ISSN 0100-6762On-line version ISSN 1806-9088

Abstract

CAMPELO, David de Holanda et al. LEAF GAS EXCHANGE AND EFFICIENCY OF PHOTOSYSTEM II IN ADULT PLANTS OF SIX FOREST SPECIES AS FUNCTION OF THE WATER SUPPLY IN THE SOIL. Rev. Árvore [online]. 2015, vol.39, n.5, pp.973-983. ISSN 0100-6762.  http://dx.doi.org/10.1590/0100-67622015000500020.

The reduction of water availability causes effects on photosynthesis and the development of tree species. The objective of this study was to evaluate leaf gas exchange and photochemical efficiency of photosystem II in adult plants of gonçalo-alves (Astronium fraxinifolium Schott), guanandi (Calophyllum brasiliense Cambess.), ipê-amarelo (Handroanthus serratifolius (Vahl.), ipê-rosa (Handroanthus impetiginosa (Mart.) Matos.), marupá (Sima roubaamara Aubl.) andmogno (Swietenia macrophylla King.) cultivated in non-irrigated and irrigated conditions, in the Irrigation Perimeter of Baixo Acaraú, Ceará, Brazil. The experimental design was a repeated measures, a scheme of split-plots (6 x 2 x 3), with the plot composed by six plant species, the subplot by two water regimes (irrigated and non-irrigated) and the sub-subplots by evaluation dates. The measurements of leaf gas exchange were made in 11/22/2012 (dry season), 02/ 07/2013 (date that preceded the rainy season) and 05/17/2013 (rainy season). The species mogno, guanandi and ipê-amarelo were more sensitive to drought compared to other species, evidenced by greater reductions in leaf gas exchange and photochemical efficiency ofphotosystem II. The ipê-rosa, marupá and gonçalo-alves were more adapted to conditions of low soil water availability.

Keywords : Water stress; Woody plants; Photosynthesis.

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