Morphophysiology of Tahiti lime grafted onto Sunki mandarin hybrids under salt stress

Silva, Luderlândio A.; Brito, Marcos E. B.; Fernandes, Pedro D.; Sá, Francisco V. da S.; Moreira, Rômulo C. L.; Almeida, Isidro P. de

doi:10.1590/1807-1929/agriambi.v23n8p598-606

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Articles • Rev. bras. eng. agríc. ambient. 23 (8) • Aug 2019 • https://doi.org/10.1590/1807-1929/agriambi.v23n8p598-606 copy

Morphophysiology of Tahiti lime grafted onto Sunki mandarin hybrids under salt stress

Morfofisiologia da limeira acida Tahiti enxertada em híbridos de tangerineira Sunki sob estresse salino

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study aimed to evaluate the growth and physiology of citrus scion/rootstock combinations irrigated with saline water until the pre-flowering stage. The experiment was conducted in drainage lysimeters with capacity for 150 dm³, in randomized block design in a 2 x 10 factorial scheme, corresponding to two electrical conductivities of water (S₁ = 0.3 and S₂ = 3.0 dS m^-1) and ten scion/rootstock combinations (nine hybrids and one commercial variety) grafted with Tahiti lime, in three repetitions and one plant per plot. Grafted seedlings were transplanted one year after sowing, subjected to salt stress from 15 days after transplanting until the pre-flowering period, and evaluated for gas exchanges and growth. The irrigation with 3.0 dS m^-1 saline water did not influence the photosynthetic activity of the studied citrus scion/rootstock combinations until the pre-flowering. The genotype Santa Cruz Rangpur lime (LCRSTC) was more sensitive to irrigation water salinity in terms of growth. The least sensitive combinations to salinity were Tahiti lime grafted onto TSKFL x (LCR x TR) - 018, TSKFL x TRBK - 011 and TSKFL x TRBK - 30.

Key words:
Citrus spp.; Poncirus trifoliata; gas exchanges; salinity

	pH CaCl₂ (2:1)	EC (dS m^-1)	P (mg dm^-3)	N (%)	K	Na	Ca	Mg	SB	T	OM (g kg^-1)
	pH CaCl₂ (2:1)	EC (dS m^-1)	P (mg dm^-3)	N (%)	(cmol_c dm^-3)						OM (g kg^-1)
Soil	7.26	0.03	7	0.16	0.52	0.36	4.55	2.35	7.79	7.42	3
Manure	6.47	1.09	98	2.44	3.82	1.54	4.52	2.63	12.51	10.97	40

Sources of variation	Mean square
Sources of variation	Period (DABS)	Genotypes (G)	Salinity (S)	G X S	Block	Erro	Mean	CV (%)
Ci	180	710.155^ns	777.600^ns	730.637^ns	506.116^ns	612.951	230.56	10.74
E	180	0.1425^ns	0.0001^ns	0.1203^ns	0.6051*	0.1237	1.266	27.78
gs	180	0.0004^ns	0.00001^ns	0.0003^ns	0.0014*	0.0005	0.057	32.54
A	180	1.958^ns	0.411^ns	1.967^ns	17.602**	1.349	4.789	24.25
WUE	180	1.1221^ns	0.6680^ns	0.5309^ns	32.6171**	0.8693	3.981	23.42
EICi	180	0.00003^ns	0.00002^ns	0.00004^ns	0.00025**	0.00002	0.020	24.89
DF		9	1	9	2	38	-	-

Sources of variation	Mean square
Sources of variation	Period (DABS)	Genotypes (G)	Salinity (S)	G X S	Block	Erro	Mean	CV (%)
SD-R	30	9.827**	0.342^ns	0.939^ns	4.128^ns	1.581	11.549	10.89
	60	18.329**	3.672^ns	2.577^ns	8.438^ns	3.554	14.457	13.04
	90	27.507**	0.110^ns	3.006^ns	8.048^ns	3.450	17.513	10.61
	120	31.825**	0.518^ns	2.141^ns	12.758^ns	5.597	20.393	11.60
	150	42.880**	23.381^ns	4.923^ns	10.544^ns	5.855	24.092	10.04
	180	51.469**	19.091^ns	4.314^ns	19.610^ns	5.497	26.429	8.87
SD-GP	30	2.381^ns	0.463^ns	2.035^ns	2.399^ns	1.670	13.378	9.66
	60	6.951*	0.004^ns	2.822^ns	5.849^ns	2.476	16.062	9.80
	90	13.393**	0.028^ns	2.897^ns	8.075^ns	3.475	19.406	9.61
	120	12.452*	7.808^ns	6.127^ns	6.052^ns	4.489	22.293	9.50
	150	13.488^ns	31.631*	6.650^ns	8.976^ns	6.490	25.373	10.04
	180	20.449**	36.746*	6.642^ns	4.084^ns	5.672	28.087	8.48
SD-S	30	1.347^ns	0.196^ns	1.057^ns	1.395^ns	0.762	9.918	8.80
	60	2.788^ns	0.011^ns	2.631^ns	0.552^ns	1.361	12.257	9.52
	90	5.569*	0.295^ns	2.796^ns	2.456	2.456	15.214	10.30
	120	9.773**	1.030^ns	4.614^ns	4.604^ns	3.100	18.040	9.76
	150	16.001*	35.737*	2.755^ns	4.188^ns	5.928	21.073	11.55
	180	14.222*	62.352**	6.379^ns	13.188^ns	5.347	23.614	9.79
NL	30	3667.075**	93.750^ns	493.564^ns	3134.466*	805.624	113.783	24.95
	60	4044.118^ns	64.066^ns	1056.325^ns	1598.616^ns	1999.985	170.433	26.24
	90	8254.444^ns	41.666^ns	2735.296n^ns	8081.016^ns	4755.525	246.666	27.96
	120	29890.992^ns	10036.266^ns	7734.933^ns	21519.650^ns	15069.755	372.200	32.98
	150	51571.71^ns	150801.06*	15280.84^ns	54802.06^ns	29515.69	489.566	35.09
	180	656469.600**	144342.489**	36666.415*	31512.467*	9104.660	649.933	14.68
DF		9	1	9	2	38	-	-

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[1] Luderlândio A. Silva - E-mail: luderlandioandrade@gmail.com (Corresponding author)