HYDROGEN PEROXIDE AS SALT STRESS ATTENUATOR IN SOUR PASSION FRUIT

RAMOS, JAILTON GARCIA; LIMA, VERA LÚCIA ANTUNES DE; LIMA, GEOVANI SOARES DE; PAIVA, FRANCISCO JEAN DA SILVA; PEREIRA, MARIANA DE OLIVEIRA; NUNES, KHEILA GOMES

doi:10.1590/1983-21252022v35n217rc

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Research Paper • Rev. Caatinga 35 (02) • Apr-Jun 2022 • https://doi.org/10.1590/1983-21252022v35n217rc copy

HYDROGEN PEROXIDE AS SALT STRESS ATTENUATOR IN SOUR PASSION FRUIT

PERÓXIDO DE HIDROGÊNIO COMO ATENUANTE DO ESTRESSE SALINO EM MARACUJAZEIRO-AZEDO

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Sour passion fruit is a fruit crop widely cultivated throughout Brazil, due to its adaptation to the tropical climate. However, in semi-arid regions its development is limited by the high concentration of soluble salts in the waters commonly used in irrigation. In this context, exogenous application of low concentrations of hydrogen peroxide can attenuate the damage caused by salt stress. The objective of this study was to evaluate electrolyte leakage, photosynthetic pigments and photochemical efficiency in sour passion fruit cv. BRS Rubi do Cerrado under irrigation with saline waters and foliar application of hydrogen peroxide. A completely randomized design was used, with treatments arranged in split plots, corresponding to five levels of irrigation water salinity - ECw (0.6; 1.2; 1.8; 2.4 and 3.0 dS m⁻¹) and four concentrations of hydrogen peroxide - H₂O₂ (0; 15; 30 and 45 μM of H₂O₂) in plots and subplots, respectively. Irrigation with saline water reduced chlorophyll a and total chlorophyll contents of sour passion fruit plants cv. BRS Rubi do Cerrado, at 240 days after transplanting. Hydrogen peroxide at concentration of 15 μM stimulated chlorophyll a and total chlorophyll biosynthesis and, at 45 μM, relieved the effect of 3.0 dS m⁻¹ water salinity on electrolyte leakage in the leaf blade of sour passion fruit. Salt stress did not affect the initial, maximum, variable fluorescence and quantum efficiency of photosystem II of sour passion fruit cv. BRS Rubi do Cerrado.

Keywords
Passiflora edulis Sims; Reactive oxygen species; Photochemical efficiency; Oxidative stress

Chemical characteristics
pH (H₂O) (1:2.5)	OM dag kg⁻¹	P (mg kg⁻¹)	K⁺	Na⁺	Ca²⁺	Mg²⁺	Al³⁺ + H⁺	ESP (%)	ECse (dS m⁻¹)
pH (H₂O) (1:2.5)	OM dag kg⁻¹	P (mg kg⁻¹)	cmol_c kg⁻¹)					ESP (%)	ECse (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
PSF (dag kg⁻¹)			Textural class	Moisture (kPa)		AW	Total porosity %	BD	PD
Sand	Silt	Clay	Textural class	33.42 1519.5 dag kg⁻¹		-	Total porosity %	(kg dm⁻³)
73.29	14.21	12.50	SL	11.98	4.32	7.66	47.74	1.39	2.66

Source of variation	DF	Mean squares
Source of variation	DF	Chl a	Chl b	Chl total	Car
Salinity levels (SL)	4	27.7^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	0.3^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	34.6^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	71918.1^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.
Linear regression	1	58.6^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	0.9^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	74.1^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	40785.5^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.
Quadratic regression	1	5.1^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	0.1^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	6.8^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	16467.6^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.
Residual 1	8	0.5	0.01	0.6	374.9
Hydrogen peroxide (H₂O₂)	3	4.2^* * respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	0.1^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	5.9^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	17583.4^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.
Linear regression	1	0.1^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	0.05^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	0.2^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	113.4^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.
Quadratic regression	1	7.0^* * respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	0.2^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	10.0^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	35133.5^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.
Interaction (SL × H₂O₂)	12	2.2^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	0.06^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	2.7^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.	19818.5^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.1 Data transformed to √x.
Residual 2	30	1.2	0.01	1.4	422.8
CV 1 (%)	-	10.6	6.4	8.7	3.9
CV 2 (%)	-	15.6	7.6	13.5	4.2

Source of variation	DF	Mean squares
Source of variation	DF	Fo	Fm	Fv	Fv/Fm	EL
Salinity levels (SL)	4	10865.5^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	87047.3^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	66784.6^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	0.0007^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	305.5^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.
Linear regression	1	22715.0^* * respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	270750.0^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	146091.4^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	1×10^-5ns	1023.8^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.
Quadratic regression	1	1423.3^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	28029.3^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	24650.1^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	1×10^-3ns	86.4^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.
Residual 1	8	4699.9	61737.2	52213.9	0.001	0.3
Hydrogen peroxide (H₂O₂)	3	3517.1^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	56004.1^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	74221.9^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	0.002^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	210.2^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.
Linear regression	1	6093.0^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	134916.8^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	183224.6^* * respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	0.004^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	0.05^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.
Quadratic regression	1	19.3^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	564.3^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	41.6^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	0.0003^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	434.7^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.
Interaction (SL × H₂O₂)	12	1788.9^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	36915.9^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	27482.4^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	0.0003^ns ns respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.	76.1^ respectively not significant, significant at probability levels of p ≤ 0.01 and p ≤ 0.05.
Residual 2	30	2197.5	40455.6	34582.4	0.0005	0.7
CV 1 (%)	-	9.12	9.19	11.64	4.54	0.95
CV 2 (%)	-	6.24	7.44	9.47	2.98	1.35

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