Physiological and vegetative behavior of banana cultivars under irrigation water salinity

Abstract

The purpose of the study was to evaluate the effect of salinity levels of irrigation water on physiology and growth of banana cultivars during the vegetative stage. The experiment was carried out following a completely randomized design in split plots, with four levels of salinity in irrigation water (0.5, 2.0, 3.0 and 4.0 dS m-1) and four banana cultivars (Pacovan, Prata Anã, BRS Platina and Princesa) with three repetitions. Stomatal conductance, transpiration, relative water content, leaf water potential and proline concentration were evaluated at 150 days after transplanting (DAT), besides plant height, stem diameter and leaf area. All variables showed sensitivity to the increase of salinity level of irrigation water. The results of soil water extraction, relative water content in leaf (RWC), leaf water potential and proline content differed (p ≤ 0.05) among the cultivars. Prata Anã and BRS Platina cultivars were the ones with lowest sensitivity, while Pacovan and BRS Princesa cultivars showed larger variation of soil water extraction and RWC with the increase in irrigation water salinity (electrical conductivity), being considered the ones of highest sensitivity to salinity in this study. Banana crop growth as a consequence of physiological effects was inhibited by the increase in water salinity, mainly in “BRS Princesa” cultivar.

Salinity-tolerant dwarf cashew rootstock has better ionic homeostasis and morphophysiological performance of seedlings

“…High concentrations of ions in the root region of plants, mainly Na + and Cl -, trigger stress that causes ionic and osmotic effects, as it inhibits the absorption of K + and Ca +2 , because Na + competes with K + and Ca +2 for absorption sites on the cell membrane, causing nutritional disorders (Silva et al, 2022), inhibits water absorption, reduces leaf turgidity, plant growth and biomass production, and increases cell membrane degradation (Oliveira et al, 2018;Lima et al, 2020;Santana Júnior et al, 2020).…”

Acclimatization of banana plantlets inoculated with Bacillus sp. and irrigated with low-salinity water

“…For example, at water salinity levels from 2 dS m -1 some cultivars, such as 'Princesa' , are sensitive. The Prata group cultivars better tolerate higher salinity levels (Santana Júnior et al, 2020). The use of plant growth-promoting bacteria (PGPB) has been cited as a potential way to mitigate the effects of salinity on banana plants irrigated with saline water (Chen et al, 2017;Baek et al, 2020;Silva et al, 2021).…”

Economic analysis of fertilization management in ‘Prata-Anã’ Gorutuba banana plants

“…Banana is one of the most produced fruits (Figure 1) and one of the most consumed foods in the world (FAOSTAT, 2021). In Brazil, banana farming is seen as an important crop in food production, being considered the most consumed fruit in the country and the second most produced, only behind oranges (SANTANA JUNIOR et al, 2020). According to IBGE data for the 2019/2020 harvest, 6.86 million tons of bananas were produced, with negative variation of 3.5% compared to the 2018/2019 harvest; with 488.5 thousand planted hectares and 15.1 tons ha -1 of national average productivity (IBGE, 2020).…”