Morphophysiological responses of sour passion fruit seedlings to water salinity and hydrogen peroxide
Excess dissolved salts in water sources in the semi-arid region of Brazil are one of the stresses that limit the expansion of irrigated areas. In this context, the aim of this study was to evaluate the morphophysiology of sour passion fruit under irrigation with saline water and hydrogen peroxide. T...
| Authors: | , , , , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2025 |
| Country: | Brasil |
| Institution: | Universidade Federal Rural do Semi-Árido (UFERSA) |
| Repository: | Revista Caatinga |
| Language: | English |
| OAI Identifier: | oai:ojs.periodicos.ufersa.edu.br:article/12582 |
| Online Access: | https://periodicos.ufersa.edu.br/caatinga/article/view/12582 |
| Access Level: | Open access |
| Keyword: | Aclimatação. Estresse salino. Passiflora edulis Sims. Acclimatization. Passiflora edulis Sims. Salt stress. |
| Summary: | Excess dissolved salts in water sources in the semi-arid region of Brazil are one of the stresses that limit the expansion of irrigated areas. In this context, the aim of this study was to evaluate the morphophysiology of sour passion fruit under irrigation with saline water and hydrogen peroxide. The study was conducted under greenhouse conditions at CCTA/UFCG in Pombal, PB, Brazil. A randomized block design was used, in a 5 × 3 factorial scheme, corresponding to five levels of electrical conductivity of irrigation water - ECw (0.3, 1.1, 1.9, 2.7, and 3.5 dS m-1) and three concentrations of hydrogen peroxide - H2O2 (0, 15, and 30 μM), with three replicates and two plants per plot. Plant height, stem diameter, leaf area, absolute and relative growth rates in stem diameter and plant height, gas exchange, electrolyte leakage, and biomass accumulation were evaluated. ECw from 0.3 dS m-1 increased electrolyte leakage in the leaf blade and reduced growth in stem diameter. Foliar application of 15 μM H2O2 reduced salt stress, improving stomatal conductance, plant height and leaf area. H2O2 at concentrations up to 30 μM increased the absolute and relative growth rates in plant height. There was also a significant increase in the accumulation of leaf dry mass with application of H2O2 at concentrations of 15 and 30 μM, as well as in root dry mass with 30 μM. |
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