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- Title
Physiological changes of bell pepper grown under nutrient solutions prepared with brackish water and H<sub>2</sub>O<sub>2</sub> concentrations.
- Authors
de Freitas Furtado, Guilherme; do Nascimento, Ronaldo; Santos Júnior, José Amilton; Garófalo Chaves, Lúcia Helena; Guedes de Souza, Felipe; Raj Gheyi, Hans
- Abstract
Adopting strategies to mitigate the negative effects of salt excess in irrigation water is essential to maintain production systems, especially in semi-arid regions. From this perspective, this study aimed to evaluate the gas exchange and photosynthetic pigments of hydroponic bell pepper grown under different water combinations (brackish water and rainwater) and foliar application of hydrogen peroxide (H2O2). The study was conducted in a protected environment at the Agricultural Engineering Academic Unit of the Federal University of Campina Grande, Brazil. The experiment was set up in a completely randomized design with 12 treatments and a 4 x 3 factorial arrangement with five replications, each consisting of four brackish water and rainwater combinations (10%/90%; 20%/80%; 30%/70%;40%/60%) and three H2O2 concentrations: 0.0 (control), 7.5 µM, and 15 µM supplied via foliar application every seven days starting 42 days after sowing (DAS). The application of 15.0 µM of H2O2 in bell pepper plants grown with the nutrient solution containing the 30%/70% and 40%/60% combinations between brackish water and rainwater increased photosynthesis 24 days after sowing and increased stress 61 days after sowing. After 61 DAS, the highest gs and E values of bell pepper grown with the nutrient solution at the electrical conductivity of 2.72 dS m-1 (10%/90%) were obtained by applying 15.0 µM of H2O2. The contents of chlorophyll "a", "b", total chlorophyll, and carotenoids of bell pepper plants showed deleterious effects caused by the salinity of the nutrient solution, mitigated by the exogenous application of 15 µM hydrogen peroxide.
- Subjects
BRAZIL; PEPPER growing; BELL pepper; CAPSICUM annuum; BRACKISH waters; PHOTOSYNTHETIC pigments; HYDROGEN peroxide; ARTIFICIAL seawater
- Publication
Comunicata Scientiae, 2022, Vol 13, p1
- ISSN
2176-9079
- Publication type
Article
- DOI
10.14295/CS.v13.3702