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- Title
MULTIVARIATE ANALYSIS OF SOURSOP UNDER SALT STRESS AND EXOGENOUS APPLICATION OF HYDROGEN PEROXIDE.
- Authors
RODRIGUES DA SILVA, ANDRÉ ALISSON; SOARES DE LIMA, GEOVANI; VIEIRA DE AZEVEDO, CARLOS ALBERTO; DAYANNE CAPITULINO, JESSICA; GHEYI, HANS RAJ; DOS ANJOS SOARES, LAURIANE ALMEIDA
- Abstract
The objective of this study was to evaluate, through multivariate data analysis, the effect of exogenous application of hydrogen peroxide on the photosynthetic pigments, gas exchange and growth of soursop seedlings under salt stress. The study was conducted in a greenhouse, at Federal University of Campina Grande - Paraíba. The assay was carried out from May to October 2018. The treatments were distributed in a randomized block design, in a 5 × 5 factorial arrangement, corresponding to five levels of irrigation water electrical conductivity - ECw (0.6-control, 1.2, 1.8, 2.4, and 3.0 dS m-1) and five concentrations of hydrogen peroxide - H2O2 (0, 10, 20, 30, and 40 µM), with two plants per plot and four replicates. Irrigation water salinity from 1.2 dS m-1 negatively affected the biosynthesis of photosynthetic pigments, gas exchange and growth of soursop. Application of hydrogen peroxide at the concentration of 20 µM resulted in attenuation of salt stress effects on the biosynthesis of photosynthetic pigments, gas exchange and growth of soursop. Hydrogen peroxide concentrations above 30 µM intensified the deleterious effect of irrigation water salinity on the photosynthetic pigments, gas exchange and growth of soursop.
- Subjects
JOAO Pessoa (Paraiba, Brazil); MULTIVARIATE analysis; SALINE waters; PHOTOSYNTHETIC pigments; WATER levels; IRRIGATION water; HYDROGEN peroxide; ELECTRIC conductivity
- Publication
Revista Caatinga, 2022, Vol 35, Issue 4, p936
- ISSN
0100-316X
- Publication type
Article
- DOI
10.1590/1983-21252022v35n421rc