Journal
REVISTA BRASILEIRA DE ENGENHARIA AGRICOLA E AMBIENTAL
Volume 26, Issue 2, Pages 119-125Publisher
UNIV FEDERAL CAMPINA GRANDE
DOI: 10.1590/1807-1929/agriambi.v26n2p119-125
Keywords
Annona muricata L.; salinity; acclimatization
Categories
Funding
- National Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [CNPq 430525/2018-4]
- CoordenacAo de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
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This study investigates the response of soursop plants to salt stress and the potential use of hydrogen peroxide to enhance their growth. The results show that irrigation water salinity significantly affects the growth and physiology of soursop plants, while appropriate concentrations of hydrogen peroxide can promote plant growth.
The cultivation of irrigated soursop in semiarid Northeastern Brazil highlights the need for information regarding its responses to the salinity of irrigation water and the use of techniques that allow its exploration, such as the use of hydrogen peroxide. Thus, the study aimed to evaluate the effect of soaking of seeds and foliar application of hydrogen peroxide on soursop plant growth and physiology under conditions of salt stress. The study was conducted in lysimeters in a greenhouse, and the treatments were distributed in a randomized block design and 4 x 4 factorial scheme, with four values of electrical conductivity of the irrigation water - ECw (0.7, 1.7, 2.7, and 3.7 dS m(-1)) and four concentrations of H2O2 (0, 25, 50, and 75 mu M), with three replicates and one plant per plot. H(2)O(2)concentrations were applied via seed imbibition and foliar spray. Irrigation with water from 0.7 dS m(-1) impairs gas exchange and absolute growth rates of plant height and stem diameter and relative growth rate in height of soursop plants. Concentrations of 35, 33 and 23 mu M of hydrogen peroxide favored the relative and absolute growth rates of plant height and transpiration, respectively. Compared to the aerial part, the root of soursop plants is more affected when irrigated with water from 1.6 dS m(-1).
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