Hydrogen peroxide in the acclimation of yellow passion fruit seedlings to salt stress

Silva, André A. R. da; Veloso, Luana L. de S. A.; Lima, Geovani S. de; Azevedo, Carlos A. V. de; Gheyi, Hans R.; Fernandes, Pedro D.

doi:10.1590/1807-1929/agriambi.v25n2p116-123

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Articles • Rev. bras. eng. agríc. ambient. 25 (2) • Feb 2021 • https://doi.org/10.1590/1807-1929/agriambi.v25n2p116-123 copy

Hydrogen peroxide in the acclimation of yellow passion fruit seedlings to salt stress¹ 1 Research developed at Universidade Federal de Campina Grande, Unidade Acadêmica de Engenharia Agrícola, Campina Grande, PB, Brasil

Peróxido de hidrogênio na aclimatação de mudas de maracujazeiro amarelo ao estresse salino

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The objective of the present study was to evaluate the effect of exogenous application of hydrogen peroxide on the emergence, growth and gas exchange of yellow passion fruit seedlings subjected to salt stress. The experiment was conducted in pots (Citropote®) under greenhouse conditions, in the municipality of Campina Grande, PB, Brazil. Treatments were distributed in a randomized block design, in a 4 x 4 factorial arrangement, with four levels of electrical conductivity of irrigation water (0.7, 1.4, 2.1 and 2.8 dS m^-1) associated with four concentrations of hydrogen peroxide (0, 25, 50 and 75 μM), with four replicates and two plants per plot. Irrigation using water with electrical conductivity above 0.7 dS m^-1 negatively affects the emergence and growth of passion fruit. Hydrogen peroxide concentrations between 10 and 30 μM induce the acclimation of passion fruit plants to salt stress, mitigating the deleterious effects of salinity on the relative growth rate in stem diameter and leaf area, stomatal conductance, transpiration, CO₂ assimilation rate and instantaneous carboxylation efficiency. Irrigation water salinity combined with hydrogen peroxide concentrations above 30 μM causes reduction in passion fruit growth and physiology.

Key words:
Passiflora edulis Sims f. flavicarpa Degener; saline waters; mitigation

Source of variation	DF	Mean squares
Source of variation	DF	ESI	EP	RGR_PH	RGR_SD	RGR_LA
Salinity levels (SL)	3	0.0073**	859.37**	0.0013**	13 x 10^-5**	0.0001^ns
Linear regression	1	0.0211**	1531.25**	0.0033**	0.0002**	3 x 10^-5^ns
Quadratic regression	1	0.0009^ns	976.56^ns	0.0001^ns	2 x 10^-5^ns	2 x 10^-5^ns
Hydrogen peroxide (H₂O₂)	3	0.0015^ns	156.25^ns	2 x 10^-5^ns	6 x 10^-5**	6 x 10^-5^ns
Linear regression	1	0.0043^ns	281.25	0.0003^ns	0.0001^ns	4 x 10^-5^ns
Quadratic regression	1	0.0001^ns	156.25^ns	0.0001^ns	1 x 10^-6^ns	1 x 10^-5^ns
Interaction (SL x H₂O₂)	9	0.0027^ns	269.09^ns	0.0002^ns	6 x 10^-5**	23 x 10^-5*
Blocks	3	0.0029^ns	52.08^ns	0.009^ns	3 x 10^-5^ns	0.0001^ns
Residue	45	0.0016	149.31	0.0001	1 x 10^-5	1 x 10^-5
CV (%)		15.32	13.32	15.92	15.16	9.57

Source of variation	DF	Mean squares
Source of variation	DF	Ci	gs	E	A	CEi	WUEi
Salinity levels (SL)	3	2816.60^ns	0.0067**	1.50**	115.45**	0.0043**	7.82*
Linear regression	1	7781.51^ns	0.0197**	4.09**	345.52**	0.0127**	15.17**
Quadratic regression	1	650.25^ns	0.0002^ns	0.29^ns	0.007^ns	0.0002^ns	3.59^ns
Hydrogen peroxide (H₂O₂)	2	2072.56^ns	0.0022*	0.58**	1.61^ns	4 x 10^-5^ns	13.22**
Linear regression	1	1.01^ns	0.0012^ns	0.38^ns	0.98^ns	5 x 10^-5^ns	17.01*
Quadratic regression	1	3937.56^ns	0.0047*	1.36**	1.45^ns	1 x 10^-5^ns	21.56**
Interaction (SL x H₂O₂)	9	963.21^ns	0.0021*	0.69**	12.08**	0.0003*	2.45^ns
Blocks	3	4698.94^ns	0.0013^ns	0.27^ns	5.23^ns	5 x 10^-5^ns	3.56^ns
Residue	45	1158.37	0.0008	0.13	2.44	13 x 10^-5	1.92
CV (%)		16.65	28.96	22.31	16.67	23.59	23.27

Unidade Acadêmica de Engenharia Agrícola Unidade Acadêmica de Engenharia Agrícola, UFCG, Av. Aprígio Veloso 882, Bodocongó, Bloco CM, 1º andar, CEP 58429-140, Campina Grande, PB, Brasil, Tel. +55 83 2101 1056 - Campina Grande - PB - Brazil
E-mail: revistagriambi@gmail.com

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[1] * Corresponding author - E-mail: andrealisson_cgpb@hotmail.com

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Hydrogen peroxide in the acclimation of yellow passion fruit seedlings to salt stress1 1 Research developed at Universidade Federal de Campina Grande, Unidade Acadêmica de Engenharia Agrícola, Campina Grande, PB, Brasil

Peróxido de hidrogênio na aclimatação de mudas de maracujazeiro amarelo ao estresse salino

ABSTRACT

Hydrogen peroxide in the acclimation of yellow passion fruit seedlings to salt stress¹ 1 Research developed at Universidade Federal de Campina Grande, Unidade Acadêmica de Engenharia Agrícola, Campina Grande, PB, Brasil