Photosynthesis of Physalis peruviana under different densities of photons and saline stress

Authors

  • Francisco Romário Andrade Figueiredo Universidade Federal Rural do Semi-Árido https://orcid.org/0000-0002-4506-7247
  • João Everthon da Silva Ribeiro Universidade Federal da Paraíba https://orcid.org/0000-0002-1937-0066
  • Jackson Silva Nóbrega Universidade Federal da Paraíba https://orcid.org/0000-0002-9538-163X
  • Wilma Freitas Celedônio Universidade Federal da Paraíba
  • Reynaldo Teodoro de Fátima Universidade Federal de Campina Grande
  • Jean Telvio Andrade Ferreira Universidade Federal de Campina Grande
  • Thiago Jardelino Dias Universidade Federal da Paraíba https://orcid.org/0000-0002-7843-6184
  • Manoel Bandeira de Albuquerque Universidade Federal da Paraíba

DOI:

https://doi.org/10.14393/BJ-v37n0a2021-53948

Keywords:

Gas exchange, Light compensation, Salinity.

Abstract

Physalis peruviana L. is a solanacea that has been gaining prominence due to its fruits presenting good acceptance in the national and international market. However, several abiotic factors, such as salinity, can cause physiological disturbances in plants, and these changes may be of greater or lesser intent according to species. Therefore, the objective of the present work was to evaluate the physiological behavior of P. peruviana submitted to different fluxes of photosynthetically active photons (PPFD) and saline stress. The experimental design was a randomized block design with three saline levels (ECw) (0.5, 2.75 and 5.00 dS m-1) with four replications. Gas exchange measurements were performed with a portable infrared gas analyzer. Liquid CO2 assimilation, stomatal conductance, internal CO2 concentration, water use efficiency and instantaneous carboxylation efficiency were measured. Data were subjected to analysis of variance by F test and in cases of significance applied to regression analysis. The increase in PPFD provided reductions in stomatal conductance up to the density of approximately 400 μmol m-2s-1, being more pronounced in ECw of 2.75 and 5.0 dS m-1. The maximum CO2 assimilation rates in the three salinities are different according to the PPFD. The salinity of irrigation water reduced the quantum efficiency of photosynthesis in P. peruviana plants.

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Published

2021-12-29

How to Cite

FIGUEIREDO, F.R.A., RIBEIRO, J.E. da S., NÓBREGA, J.S., CELEDÔNIO, W.F., FÁTIMA, R.T. de, FERREIRA, J.T.A., DIAS, T.J. and ALBUQUERQUE, M.B. de, 2021. Photosynthesis of Physalis peruviana under different densities of photons and saline stress. Bioscience Journal [online], vol. 37, pp. e37082. [Accessed8 August 2022]. DOI 10.14393/BJ-v37n0a2021-53948. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/53948.

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Section

Agricultural Sciences