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- Title
Hydrogen peroxide as a saline stress attenuator in okra (Abelmoschus esculentus L.).
- Authors
Pereira Lopes, Iracy Amélia; dos Anjos Soares, Lauriane Almeida; Soares de Lima, Geovani; Almeida Roque, Iara; de Andrade Silva, Luderlândio; Rodrigues da Silva, André Alisson; Soares da Silva, Saulo; Dantas Fernandes, Pedro
- Abstract
Okra is a vegetable that stands out for its low production cost, high yield, high nutritional and value and socioeconomic importance in income generation, especially in family farming. In this context, the present study evaluated the physiology, production and water use efficiency of okra under irrigation with saline water and exogenous application of hydrogen peroxide. The treatments were distributed in a randomized block design, in a 5 × 3 factorial arrangement, with five levels of electrical conductivity of irrigation water - ECw (0.3; 1.3; 2.3; 3.3 and 4.3 dS m-1) and three concentrations of hydrogen peroxide - H2O2 (0, 25 and 50 µM), with five replicates, totaling 75 plants. Irrigation with ECw above 0.3 dS m-1 negatively affected stomatal conductance, transpiration, number of fruits, total production and water use efficiency of okra cv. Clemson Americano 80. Hydrogen peroxide at concentration of 22 µM mitigated the effects of salt stress on CO2 assimilation rate, number of fruits, average fruit weight and total production of okra cv. Clemson Americano 80. Water use efficiency is favored by H2O2 application at concentration of 12 µM, especially in plants irrigated with ECw of 0.3 dS m-1.
- Subjects
OKRA; HYDROGEN peroxide; WATER efficiency; SALINE irrigation; IRRIGATION water; SALINE waters
- Publication
Ciência Rural, 2024, Vol 54, Issue 5, p1
- ISSN
0103-8478
- Publication type
Article
- DOI
10.1590/0103-8478cr20220252