Photosynthetic performance in Eucalyptus clones cultivated in saline soil

  • Jailma Ribeiro de Andrade Laboratório de Fisiologia Vegetal, Centro de Ciências Agrárias, Universidade Federal de Alagoas, Campus Delza Gitaí, BR 104 Norte, Km 85, 57072-900, Rio Largo, AL, Brazil
  • Sebastião de Oliveira Maia Júnior Unidade Acadêmica de Engenharia Agrícola, Centro de Tecnologia e Recursos Naturais, Universidade Federal de Campina Grande, Av. Aprígio Veloso, 882, Bairro Universitário, 58429-900, Campina Grande, PB, Brazil
  • Andrea Francisca da Silva Santos Laboratório de Fisiologia Vegetal, Centro de Ciências Agrárias, Universidade Federal de Alagoas, Campus Delza Gitaí, BR 104 Norte, Km 85, 57072-900, Rio Largo, AL, Brazil
  • Vicente Mota da Silva Laboratório de Ecofisiologia Aplicada à Agricultura, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista Júlio de Mesquita Filho, Avenida Universitária, 3780 – CEP 18610-034, Altos do Paraíso, Botucatu, SP, Brazil
  • L.T. Bezerra, J.R.R. da Silva, C.M. Santos, V.M. Ferreira, L. Endres Laboratório de Fisiologia Vegetal, Centro de Ciências Agrárias, Universidade Federal de Alagoas, Campus Delza Gitaí, BR 104 Norte, Km 85, 57072-900, Rio Largo, AL, Brazil

Abstract

The aim of this study was to evaluate the photosynthetic performance of Eucalyptus clones with the aim of identifying their tolerance to soil saline stress conditions. The experiment was arranged in a randomized block design with a 3 × 4 factorial arrangement: in five replications, totaling 60 plots, three Eucalyptus clones were used, VC865, I224, and I144, which were exposed to four concentrations of NaCl (0, 1, 2 and 3 g NaCl kg-1 of soil). Clone I144 shows mechanisms of salinity tolerance as smaller reductions in the stomatal conductance, transpiration, photosynthesis, photochemical efficiency of PSII, photosynthetic pigment content and total dry mass. On the other hand, clone I224 presents greater physiological damage, indicating high susceptibility to salt stress, while VC865 shows moderate sensitivity to salinity. Variables related to photosynthetic performance, such as gas exchange, photochemical efficiency of PSII and photosynthetic pigments are potentially reliable physiological indicators for selecting of tolerant Eucalyptus clones to salt stress.

Keywords: Forestry species, hybrids, physiology, salt stress, tolerance
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How to Cite
Andrade, J. R. de, S. de O. M. Júnior, A. F. da Silva Santos, V. M. da Silva, and L. B. J. da S. C.M. Santos, V.M. Ferreira, L. Endres. “Photosynthetic Performance in Eucalyptus Clones Cultivated in Saline Soil”. Emirates Journal of Food and Agriculture, Vol. 31, no. 5, May 2019, pp. 368-79, doi:https://doi.org/10.9755/ejfa.2019.v31.i5.1955. Accessed 2 Aug. 2021.
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Research Article