Gas exchanges and photosynthetic pigments of ‘Tommy Atkins’ mango as a function of fenpropimorph

Carreiro, Daniel de A.; Amariz, Renata A. e; Sanches, Luciana G.; Lobo, Jackson T.; Paiva Neto, Vespasiano B. de; Cavalcante, Ítalo H. L.

doi:10.1590/1807-1929/agriambi.v26n4p239-247

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Articles • Rev. bras. eng. agríc. ambient. 26 (4) • Apr 2022 • https://doi.org/10.1590/1807-1929/agriambi.v26n4p239-247 copy

Gas exchanges and photosynthetic pigments of ‘Tommy Atkins’ mango as a function of fenpropimorph¹ 1 Research developed at Petrolina, PE, Brazil

Trocas gasosas e pigmentos fotossintéticos de mangueira ‘Tommy Atkins’ em função de fenpropimorfe

Authorship SCIMAGO INSTITUTIONS RANKINGS

HIGHLIGHTS:

Fenpropimorph promotes a higher physiological activity in mango.

Fenpropimorph favors carbon assimilation in mango.

Fenpropimorph dose of 1.3 g per linear meter of plant canopy promotes higher transpiration and stomatal conductance in mango.

ABSTRACT

The objective of the present study was to evaluate the influence of the application of fenpropimorph and paclobutrazol on gas exchanges and photosynthetic pigments of ‘Tommy Atkins’ mango grown in the semi-arid region in different evaluation periods. Two experiments were carried out in ‘Tommy Atkins’ mango orchards in the first production cycle between September and December 2018 (first experiment) and between September and December 2019 (second experiment) in Petrolina, PE, Brazil. The experimental design adopted was randomized blocks in split plots in time, 4 × 4 + 1, with four replicates. The plots corresponded to the concentrations of fenpropimorph: 0, 0.7, 1.0, and 1.3 g per linear meter of plant canopy diameter plus the additional paclobutrazol treatment (1 g per linear meter of plant canopy diameter), and the subplots corresponded to the evaluation dates (0, 30, 60, and 90 days after the first application of treatments). The following traits were evaluated: CO₂ assimilation rate, stomatal conductance, internal CO₂ concentration, transpiration, water use efficiency, chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids. The fenpropimorph dose of 1.3 g per linear meter of plant canopy promotes a higher rate of CO₂ assimilation; however, paclobutrazol was more effective in the accumulation of chlorophyll a and total chlorophyll, and the use of fenpropimorph did not interfere in the concentration of photosynthetic pigments.

Key words:
Mangifera indica L.; growth regulator; plant physiology

First experiment
Soil layer (cm)	pH (H₂O)	EC (dS m^-1)	P (mg dm^-3)	K⁺	Na⁺	Ca²⁺	Mg²⁺	Al³⁺	SB
Soil layer (cm)	pH (H₂O)	EC (dS m^-1)	P (mg dm^-3)	(cmol_c dm^-3)
0-20	7.24	0.13	123.35	1.74	0.13	4.05	2.06	0.00	7.98
20-40	7.26	0.11	595.34	1.41	0.13	3.59	2.11	0.00	7.24
	OM	FA	HA	HU	Sand	Silt	Clay	Texture
	(g kg^-1)				(dag kg^-1)			Texture
0-20	14	2.41	1.44	10.01	68.65	14.25	17.1	Sandy Loam
20-40	15.1	1.63	1.12	9.99	67.78	17.12	15.1	Sandy Loam
Second experiment
	pH (H₂O)	EC (dS m^-1)	P (mg dm^-3)	K⁺	Na⁺	Ca²⁺	Mg²⁺	Al³⁺	SB
	pH (H₂O)	EC (dS m^-1)	P (mg dm^-3)	(cmol_c dm^-3)
0-20	7.30	0.37	616.90	2.59	0.70	4.27	3.02	0.00	10.58
20-40	7.56	0.22	298.07	1.56	0.56	3.70	2.17	0.00	7.99
	OM	FA	HA	HU	Sand	Silt	Clay	Texture
	(g kg^-1)				(dag kg^-1)			Texture
0-20	12.14	3.35	3.11	4.13	75.91	9.69	14.40	Sandy Loam
20-40	10.26	3.32	2.69	4.44	77.72	8.78	13.50	Sandy Loam

FEN (g per linear meter of plant canopy)	A (mmolCO₂ m^-2 s^-1)	gs (mol m^-2 s^-1)	Ci (mmol m^-2 s^-1)	E (mmol H₂O m^-2 s^-1)	WUE (mmol CO₂ mmol^-1 H₂O)
First experiment
0.0	11.55	0.12	202.87	3.02	4.19
0.7	10.85	0.10	188.58	2.96	3.88
1.0	10.77	0.12	216.01*	2.99	3.87
1.3	11.68*	0.12	200.64	3.02	4.02
PBZ	11.29	0.11	195.84	2.96	4.06
ED	72.61**	51.12**	11.82**	65.04**	19.64**
0	13.19	0.16	229.89	3.78	3.52
30	11.89	0.14	221.86	3.85	3.14
79	5.58	0.04	162.57	1.29	4.55
90	14.27	0.13	188.83	3.04	4.79
FEN	1.03^ns	1.24^ns	1.11^ns	0.02^ns	0.63**
FEN X ED	0.90^ns	2.26*	0.29^ns	0.70^ns	0.30^ns
CV (%)	16.52	27.5	21.09	24.55	19.26
Second experiment
0.0	12.24	0.11	185.65	3.53	3.56
0.7	12.41	0.11	174.92	3.56	3.52
1.0	12.84	0.11	171.67	3.78	3.47
1.3	13.71*	0.14	196.37	4.76 *	2.97
PBZ	12.83	0.11	181.83	3.76	3.46
ED	41.32**	20.05**	6.15**	18.69**	20.73**
0	14.85	0.14	184.98	3.94	3.90
30	7.88	0.07	193.73	2.53	3.20
79	15.59	0.15	195.27	4.27	3.70
90	12.89	0.10	154.39	4.78	2.78
FEN	0.91^ns	3.93**	0.48^ns	11.66**	4.31**
FEN X ED	0.58^ns	0.53^ns	1.51^ns	1.18^ns	1.05^ns
CV (%)	21.64	23.14	35.58	17.38	15.73

FEN (g per linear meter of plant canopy)	Chlorophyll a	Chlorophyll b	Total chlorophyll	Carotenoids
FEN (g per linear meter of plant canopy)	(mg g^-1 FM)
First experiment
0.0	0.91*	0.27	1.18*	0.37
0.7	0.90*	0.29	1.19*	0.38
1.0	0.87*	0.29	1.16*	0.35
1.3	0.87*	0.29	1.15*	0.37
PBZ	1.00	0.33	1.33	0.41
ED	13.37**	7.16**	11.16**	11.23**
0	0.66	0.24	0.90	0.30
30	0.98	0.37	1.35	0.42
60	0.97	0.28	1.24	0.39
90	1.03	0.28	1.31	0.40
FEN	0.19^ns	0.23^ns	0.08^ns	0.31^ns
FEN X ED	1.07^ns	0.77^ns	1.09^ns	1.81^ns
CV (%)	24.71	26.78	22.93	22.72
Second experiment
0.0	0.73	0.25	0.98	0.32
0.7	0.76	0.22	0.98	0.32
1.0	0.84	0.19	1.03	0.33
1.3	0.81	0.23	1.04	0.34
PBZ	0.80	0.24	1.05	0.35
ED	1.59^ns	0.67^ns	1.38^ns	2.51^ns
0	0.78	0.21	0.99	0.35
30	0.74	0.21	0.95	0.30
60	0.76	0.25	1.01	0.31
90	0.87	0.24	1.11	0.35
FEN	0.69^ns	1.06^ns	0.20^ns	0.26^ns
FEN X ED	1.04^ns	1.29^ns	1.07^ns	1.20^ns
CV (%)	29	39.91	28.01	26.44

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: daniel.almeida.sb@gmail.com

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Gas exchanges and photosynthetic pigments of ‘Tommy Atkins’ mango as a function of fenpropimorph1 1 Research developed at Petrolina, PE, Brazil

Trocas gasosas e pigmentos fotossintéticos de mangueira ‘Tommy Atkins’ em função de fenpropimorfe

HIGHLIGHTS:

ABSTRACT

Gas exchanges and photosynthetic pigments of ‘Tommy Atkins’ mango as a function of fenpropimorph¹ 1 Research developed at Petrolina, PE, Brazil