Quality of yellow passion fruit seedlings under saline water irrigation and salicylic acid concentrations

Nobre, Reginaldo G.; Araujo, Joseane B.; Carvalho, Kaila M. P. de; Bezerra, Idelfonso L.; Silva, Luderlândio de A.; Soares, Lauriane A. dos Anjos; Souza, Maria do S. M. de; Rodrigues Filho, Ricardo A.

doi:10.1590/1983-21252024v3711879rc

Brasil

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Scientific Article • Rev. Caatinga 37 • 2024 • https://doi.org/10.1590/1983-21252024v3711879rc linkcopy

Quality of yellow passion fruit seedlings under saline water irrigation and salicylic acid concentrations

Qualidade de mudas de maracujazeiro-amarelo sob irrigação com águas salobras e concentrações de ácido salicílico

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The objective of this study was to evaluate the quality of „BRS Gigante Amarelo‟ passion fruit seedlings irrigated with brackish waters under salicylic acid application. The experiment was conducted under conditions of protected environment (screened) in the experimental area of the Federal Rural University of the Semiarid Region (UFERSA), Multidisciplinary Campus of Caraúbas, RN, Brazil, in the period from August to November 2022, in a randomized block experimental design and analyzed in a 4 x 4 factorial scheme, with four replicates and one plant per plot, with treatments consisting of electrical conductivity of irrigation water - ECw (0.5, 1.4, 2.3 and 3.2 dS m^-1) and concentrations of salicylic acid - SA (0.0, 1.5, 3.0, and 4.5 mM L^-1). Electrical conductivity of irrigation water up to 3.2 dS m^-1 does not affect the absolute growth, photosynthetic rate and quality of „BRS Gigante Amarelo‟ passion fruit seedlings; ECw from the average value of 1.3 dS m^-1 affects stomatal conductance, transpiration, internal CO₂ concentration and root fresh and dry mass production. Foliar application of salicylic acid does not mitigate the effect of salt stress from irrigation water on the production of yellow passion fruit seedlings; however, the average concentration of 3.15 mM L^-1 promotes greater absolute and relative growth, shoot fresh and dry mass and quality of seedlings. SA concentration of 1.5 mM L^-1, associated with ECw of 1.0 dS m^-1, is recommended for the production of “BRS Gigante Amarelo” passion fruit seedlings.

Keywords Passifloraceae; Salt stress; Phytohormone

	Sand		Silt	Clay		Textural classification		ECse dS m^-1	pHse H₂O	OM gkg^-1
	446		gkg^-1 411	143		Loam		0.68	6.03	37
P	K⁺	Na⁺	Ca²⁺	Mg²⁺	Al³⁺	(H+Al)	SB	T	CEC	V M	ESP
mg dm^-3 134.2	0.87	0.15	17.11	1.14	- cmol_c 0.0	dm^-3 0.58	19.27	19.27	19.27	% 97 0	1

Source of Variation	Mean Square
Source of Variation	AGRph	agr_sd	agr_la	RGR_PH	RGRsd	RGRla
Salinity Levels (SL)	0.052™	0.00014™	24.586™	0.000026^*	0.0002™	0.00070^ns
Linear Reg.	0.064™	0.00034™	0.230™	0.000001^ns	0.00050™	0.0000^ns
Quadratic Reg.	0.091™	0.000075™	23.608™	0.000078^*	0.00001™	0.000099^ns
SA Concentrations	0.153^ ,* respectively not significant, significant at p ≤ 0.01 and p ≤ 0.05, by the F test; CV = coefficient of variation.	0.00041^*	31.305^ ,* respectively not significant, significant at p ≤ 0.01 and p ≤ 0.05, by the F test; CV = coefficient of variation.	0.000030^*	0.00023™	0.0037^ns
Linear Reg.	0.398^ ,* respectively not significant, significant at p ≤ 0.01 and p ≤ 0.05, by the F test; CV = coefficient of variation.	0.00021™	10.361™	0.000083^*	0.00010^ns	0.00023^ns
Quadratic Reg.	0.052™	0.00083^*	69.286^ ,* respectively not significant, significant at p ≤ 0.01 and p ≤ 0.05, by the F test; CV = coefficient of variation.	0.000004™	0.00052™	0.00067™
Interaction (SL x SA)	0.058™	0.000098™	9.092™	0.000028™	0.00006™	0.000040™
Block	0.054™	0.00019™	7.510™	0.00011^ ,* respectively not significant, significant at p ≤ 0.01 and p ≤ 0.05, by the F test; CV = coefficient of variation.	0.00038^ns	0.00021™
CV(%)	21.99	31.08	22.25	14.21	31.94	32.63


Source of Variation	A	Gs	E	Ci
Salinity Level (SL)	21.88^ns	0.06^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	3.69^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	630.41^{^*}
Linear Reg.	21.42^ns	0.009^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	2.95^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	53.20^ns
Quadratic Reg.	3.140^ns	0.009^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	7.95^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	1788.52^{^*}
SA concentrations	17.68^ns	0.008^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	1.77^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	1629.69^{^*}
Linear Reg.	0.690^ns	0.010^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	2.97^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	1201.54^{^*}
Quadratic Reg.	12.38^ns	0.008^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	1.67^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	3519.19^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}
Interaction (SL x SA)	10.57^ns	0.001^ns	0.34^{^*}	1058.77^{^*}
Block	9.60^ns	0.002^ns	1.78^{^ ,* respectively not significant, significant at p ≤ 0.01 and significant at p ≤ 0.05 by the F test. CV = coefficient of variation.}	240.81^ns
CV(%)	15.57	23.22	15.22	12.25

Source of Variation	Mean Square
Source of Variation	SFM	SDM	RFM	RDM	DQI
Salinity Level (SL)	31.41^**	0.13^ns	1.61^*	0.03^*	0.002^ns
Linear Reg.	0.0001^ns	0.32^ns	4.46^*	0.09^*	0.004^ns
Quadratic Reg.	67.40^**	0.06^ns	0.31^ns	0.005^ns	0.001^ns
SA concentrations	9.21^*	0.78^*	0.23^ns	0.009^ns	0.11^*
Linear Reg.	22.78^*	0.92^*	0.66^ns	0.002^ns	0.002^ns
Quadratic Reg.	4.82^ns	1.03^*	0.004^ns	0.02^ns	0.023^*
Interaction (SL x SA)	10.28^ns	0.52^ns	0.35^ns	0.005^ns	0.002^ns
Block	1.35^ns	0.17^ns	0.08^ns	0.0009^ns	0.001^ns
CV(%)	14.61	12.59	33.18	21.51	19.21

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