Saline water irrigation and foliar application of H<sub>2</sub>O<sub>2</sub> change ionic homeostasis of sour passion fruit

Ramos, Jailton G.; Lima, Vera L. A. de; Lima, Geovani S. de; Nunes, Kheila G.; Torres, Rafaela A. F.; Silva, Francisco A. da; Pereira, Mariana de O.; Soares, Lauriane A. dos A.

doi:10.1590/1983-21252024v3712122rc

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Scientific Article • Rev. Caatinga 37 • 2024 • https://doi.org/10.1590/1983-21252024v3712122rc copy

Saline water irrigation and foliar application of H₂O₂ change ionic homeostasis of sour passion fruit

Irrigação com águas salinas e aplicação foliar de H₂O₂ altera a homeostase iônica do maracujazeiro-azedo

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Qualitative and quantitative scarcity of water sources is a reality in the Brazilian semi-arid region and restricts the expansion of irrigated areas in this region, where high levels of soluble salts are common. Thus, it is extremely important to seek strategies to enable the production of fruit crops such as sour passion fruit. In this context, the objective of this study was to evaluate the levels of NPK, Na⁺ and Cl^- in leaf and stem tissues of sour passion fruit cv. BRS Rubi do Cerrado as a function of irrigation with saline water and exogenous application of hydrogen peroxide. The experiment was carried out in drainage lysimeters under greenhouse conditions in Campina Grande, PB, Brazil. The design was completely randomized in split plots, with five levels of electrical conductivity of water - ECw (0.6, 1.2, 1.8, 2.4 and 3.0 dS m^-1) considered plots and four concentrations of hydrogen peroxide – H₂O₂ (0, 15, 30 and 45 µM) considered subplots, with three repetitions. Sodium content in the leaves decreased when the H₂O₂ concentration of 45 µM was applied. N/P and N/Na ratios in the leaves of sour passion fruit cv. BRS Rubi do Cerrado decreased with the increase in irrigation water salinity from 2.76 and 2.03 dS m^-1, respectively. Chloride content in the leaves of sour passion fruit increased as a function of irrigation water salinity, regardless of H₂O₂ application.

Keywords:
Passiflora edulis Sims ; Fruit farming; Salt stress; Plant nutrition

EC	pH	Ca²⁺	Mg²⁺	Na⁺	K⁺	Cl^-	CO₃^-	HCO₃^⁻	SAR
dS m^-1	-				(mmol_c L^-1)				(mmol_c L^-1)^0.5
0.4	7.67	0.69	1.34	1.19	0.13	1.50	0.10	1.53	1.10

Source of variation	DF	Mean squares
Source of variation	DF	Nleaf	Nstem	Pleaf	Pstem	Kleaf	Kstem	Naleaf	Nastem
Salinity levels (SL)	4	0.15^*	7.52^**	2.39^**	14.97^**	6.52^*	9.57^**	165395,73^**	104960,2^**
Linear Regression	1	0.32^**	21.71^**	7.97^**	50.31^**	2.32^**	30.55^**	636241.59^**	402174.79^**
Quadratic Regression	1	0.99^**	7.67^**	0.88^*	8×10-⁴**	0.16^**	0.61^**	19735.15^**	152.73^**
Residual 1	8	0.04	0.295	0.12	0.07	1.30	0.23	180.30	632.28
Hydrogen peroxide (H₂O₂)	3	0.07^ns	8.44^**	0.09^ns	4.03^**	1.85^ns	2.04^**	2789.54^**	8816.89^**
Linear Regression	1	0.11^ns	9.57^**	0.19^ns	0.19^ns	0.76^ns	3.00^**	2975.25^**	1692.13^*
Quadratic Regression	1	0.03^ns	12.65^**	0.06^ns	0.07^ns	0.85	0.22^ns	75069.99^**	2615.82^**
Interaction (SL × H₂O₂)	12	0.07^ns	4.28^**	0.11^ns	1.81^**	12.61^**	6.01^**	4289.31^**	2487.40^**
Residual 2	30	0.41	0.42	0.10	0.22	0.85	0.26	178.88	379.65
CV 1 (%)		2.51	6.28	17.01	9.23	11.00	9.23	4.50	9.51
CV 2 (%)		2.41	7.53	15.17	15.91	8.94	9.87	4.40	7.37

Source of variation	DF	Mean squares
Source of variation	DF	Clleaf	Clstem	Na/K_leaf	Na/K_stem	N/Na_leaf	N/Na_stem	N/Pleaf	N/Pstem
Salinity levels (SL)	4	1875.5^**	188.8^**	1557.2^**	1958.1^**	4x10^-2**	21x10^-2**	11.6^**	16.9^**
Linear Regression	1	6421.6^**	628.9^**	5551^**	5547.8^**	13x10^-3**	7x10^-2**	39.6^**	47.1^**
Quadratic Regression	1	261.5^**	16.9^**	61.2^**	415.3^**	0.09^**	1x10^-2**	5.4^**	1.2^ns
Residual 1	8	30.5	7.7	13.6	44.4	9x10^-5	5x10^-4	0.3	0.3
Hydrogen peroxide (H₂O₂)	3	94.6^**	39.4^**	121.7^**	1040.9^**	14x10^-3**	3x10^-3**	0.04^ns	2.8^ns
Linear Regression	1	2.6^**	0.03^ns	78.9^*	618.6^**	1x10^-5ns	43x10^-4ns	0.9^ns	4.4^**
Quadratic Regression	1	229.7^**	49.2^**	100.3^**	66.6^ns	44x10^-3**	1.3x10^-3*	0.6^ns	0.1^ns
Interaction (SL × H₂O₂)	12	765.9^**	75.9^**	90.2^**	601.1^**	15x10^-3**	98x10^-6**	0.44^ns	0.9^ns
Residual 2	30	18.5	2.7	4.2	48.1	4x10^-5	26x10^-4	0.28	0.6
CV 1 (%)		11.09	11.91	12.29	12.72	8.79	19.03	12.27	16.63
CV 2 (%)		8.64	7.11	12.53	13.24	5.57	13.86	12.58	23.37

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[1] *Corresponding author: <kheilagomesnunes@gmail.com>

Chemical characteristics
pH (H₂O)	OM	P	K⁺	Na⁺	Ca²⁺	Mg²⁺	Al³⁺ + H⁺	ESP	ECse
(1:2.5)	dag kg^-1	(mg kg^-1)	(cmol_c kg^-1)					(%)	(dS m^-1)
5.90	1.36	6.80	0.22	0.16	2.60	3.66	1.93	1.87	1.0
Physical-hydraulic characteristics
Particle-size fraction (dag kg^-1)			Textural class	Moisture (kPa)		AW	Total porosity %	BD	PD
Sand	Silt	Clay		33.42.	1519.5 dag kg^-1			(kg dm^-3)
732.9	142.1	125.0	SL	11.98	4.32	7.66	47.74	1.39	2.66

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Saline water irrigation and foliar application of H2O2 change ionic homeostasis of sour passion fruit

Irrigação com águas salinas e aplicação foliar de H2O2 altera a homeostase iônica do maracujazeiro-azedo

ABSTRACT

Saline water irrigation and foliar application of H₂O₂ change ionic homeostasis of sour passion fruit

Irrigação com águas salinas e aplicação foliar de H₂O₂ altera a homeostase iônica do maracujazeiro-azedo