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- Title
Application methods of hydrogen peroxide in soursop seedlings irrigated with saline water.
- Authors
de Sá Almeida Veloso, Luana Lucas; Dayanne Capitulino, Jessica; Soares de Lima, Geovani; Vieira de Azevedo, Carlos Alberto; Rodrigues da Silva, André Alisson; Gheyi, Hans Raj
- Abstract
Plant acclimatization to salt stress with the application of hydrogen peroxide occurs through the activation of the antioxidant defense system. In this perspective, this study aimed to evaluate the contents of photosynthetic pigments and the photochemical efficiency of soursop seedlings under irrigation with saline waters and different methods of application of hydrogen peroxide. The study was performed under plant nursery conditions, in a 5 x 4 factorial arrangement, referring to five conductivity levels of the irrigation water (0.6, 1.2, 1.8, 2.4 and 3.0 dS m-1) and four methods of application of hydrogen peroxide (without H2O2 application, application via seed soaking, application via foliar spraying, and application via seed soaking and foliar spraying). Irrigation water salinities up to 1.4 and 1.1 dS m-1 caused an increase in the synthesis of chlorophyll b and carotenoids, respectively. Irrigation water salinities from 0.6 dS m-1 reduced the synthesis of chlorophyll a and total chlorophyll of the soursop seedlings. The application of 20 µM of H2O2 via seed soaking results in the increase of the contents of chlorophyll a, b, total, and maximum and variable fluorescence of the soursop seedlings. Seed soaking with hydrogen peroxide increased the initial fluorescence of chlorophyll in the plants irrigated with 1.2 dS m-1.
- Subjects
SALINE waters; SALINE irrigation; PHOTOSYNTHETIC pigments; WATER levels; IRRIGATION water; HYDROGEN peroxide
- Publication
Comunicata Scientiae, 2021, Vol 12, p1
- ISSN
2176-9079
- Publication type
Article
- DOI
10.14295/CS.v12.3288