Electrical conductivity and accelerated aging in amaranth (<i>Amaranthus crueentus</i> L.) seeds

Rosa, Thaís D’Avila; Nadal, Ariele Paula; Maldaner, Henrique Roberto; Soares, Vanessa Nogueira; Gadotti, Gizele Ingrid; Villela, Francisco Amaral

doi:10.1590/2317-1545v40n1183116

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ORIGINAL ARTICLE • J. Seed Sci. 40 (1) • Jan-Mar 2018 • https://doi.org/10.1590/2317-1545v40n1183116 copy

Electrical conductivity and accelerated aging in amaranth (Amaranthus crueentus L.) seeds

Condutividade elétrica e envelhecimento acelerado em sementes de amaranto (Amarantus cruentus L.)

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract:

The objective of this study was to determine adequate conditions of water volume, seed quantity and immersion period to perform the electrical conductivity test, and to analyze the parameters of the accelerated aging test and its correlation with the the physiological potential of amaranth seeds. Five lots of amaranth seeds (Amaranthus cruentus), cultivar BRS Alegria, were used. The initial evaluation of the quality of these lots comprehended the following tests: water content, germination, first germination count, accelerated aging (traditional method, and modified versions, using unsaturated and saturated saline solution for the periods of 24, 48 and 72 h), electrical conductivity in different periods (2, 4, 6, 8 and 24 h), different quantities of water (25, 50 and 75 mL), different seed quantities (100 and 150), and field emergence. It could be concluded that the accelerated aging test at 41 °C, for 72 h, using unsaturated NaCl solution was efficient in the classification of amaranth seed lots in levels of vigor. The electrical conductivity test performed for 8 hours with 25 mL of water and 100 seeds was efficient in the classification of amaranth seeds as to their physiological potential.

Index terms:
Amaranthus cruentus; solutes leaching; NaCl solution; germination; vigor

ABRATES - Associação Brasileira de Tecnologia de Sementes Av. Juscelino Kubitschek, 1400 - 3° Andar, sala 31 - Centro,, CEP 86020-000 Londrina/PR - Londrina - PR - Brazil
E-mail: jss@abrates.org.br

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[1] ^*Correspondig author gizele.gadotti@ufpel.edu.br

Lots	WC (%)
	Initially	TRAD¹			USS²			SSS³
	Initially	24 h	48 h	72 h	24 h	48 h	72 h	24 h	48 h	72 h
L1	13.1	18.7	19.0	20.2	10.2	10.1	11.3	8.2	8.4	9.1
L2	13.5	18.9	19.1	20.1	10.5	10.2	11.4	8.8	8.1	9.2
L3	13.0	18.5	18.8	20.0	10.5	10.4	11.4	8.3	8.2	9.2
L4	13.1	18.6	18.8	20.1	10.9	10.4	11.4	8.3	8.3	9.4
L5	13.2	18.7	18.9	20.1	10.7	10.3	11.7	8.5	8.4	9.3

Lots	FGC¹	Germination	Emergence
Lots	%	%	%
L1	97 a²	98 a	79 c
L2	91 b	93 b	73 d
L3	93 ab	94 ab	84 b
L4	98 a	99 a	88 a
L5	75 c	76 c	60 e
CV (%)	6.1	6.5	10.5

Lots	Vigor
	TRAD¹			USS²			SSS³
	24 h	48 h	72 h	24 h	48 h	72 h	24 h	48 h	72 h
L1	96 a⁴	97 a	96 a	97 a	96 a	95 ab	89 ab	99 a	95 a
L2	69 b	77 b	92 a	63 c	85 bc	87 b	78 bc	85 bc	91 a
L3	92 a	93 a	94 a	90 ab	94 ab	95 ab	84 abc	96 ab	97 a
L4	94 a	94 a	90 a	95 a	92 ab	98 a	96 a	96 ab	95 a
L5	69 b	74 b	74 b	78 bc	75 c	70 c	69 c	73 c	72 b
CV(%)	8.35	6.80	7.27	8.25	6.48	8.46	9.09	6.57	8.44

Lot	25 mL of water
	100 seeds					150 seeds
	2 h	4 h	6 h	8 h	24 h	2 h	4 h	6 h	8 h	24 h
L 1	3.0 a¹	5.8 a	4.1 a	5.1 a	8.3 a	3.9 ba	4.6 a	6.3 a	6.5 a	8.1 a
L 2	7.4 b	10.4 c	10.3 b	13.0 b	12.8 b	2.8 a	8.0 c	9.5 b	15.3 c	14.8 b
L 3	8.9 b	8.0 b	12.7 c	15.2 b	14.1 b	5.7 c	7.6 c	10.8 cb	10.9 b	14.4 b
L 4	3.2 a	4.5 a	4.5 a	5.1 a	5.1 a	4.4 b	5.9 b	6.5 a	6.8 a	8.4 a
L 5	12.2 c	14.7 d	16.6 d	30.2 c	24.3 c	5.1 cb	4.1 a	11.7 c	16.3 c	27.9 c
CV(%)	16.4	13.5	8.1	15.7	12.0	15.1	10.0	8.4	13.7	13.2
Lot	50 mL of water
	100 seeds					150 seeds
	2 h	4 h	6 h	8 h	24 h	2 h	4 h	6 h	8 h	24 h
L 1	2.2 a	1.3 a	2.1 a	1.0 a	2.4 a	2.4 a	1.9 a	2.2 a	2.2 a	3.3 a
L 2	3.3 ab	3.9 b	3.8 ba	8.1 b	10.2 c	7.5 c	2.5 a	3.9 b	7.4 b	8.7 b
L 3	5.5 c	5.0 b	5.4 b	7.1 b	5.9 b	5.4 b	4.2 b	5.1 b	4.9 a	7.6 b
L 4	4.4 bc	4.5 b	4.6 b	6.2 b	5.4 b	3.9 a	5.0 b	5.2 b	5.6 a	7.2 b
L 5	7.9 d	10.3 c	11.1 c	13.8 c	15.9 d	10.5 d	8.9 c	10.2 c	13.6 c	13.4 c
CV(%)	20.0	15.0	22.2	13.9	19.0	10.1	14.9	14.3	13.4	18.8
Lot	75 mL of water
	100 seeds				150 seeds
	2 h	4 h	6 h	8 h	24 h	2 h	4 h	6 h	8 h	24 h
L 1	0.4 a	0.4 a	0.4 a	1.4 a	0.7 a	1.7 a	0.6 a	1.5 a	1.2 a	2.0 a
L 2	3.5 cd	2.7 bc	3.8 c	3.8 bc	5.0 bc	3.3 ab	3.0 c	3.6 b	4.4 c	4.6 b
L 3	2.8 bc	3.3 c	3.7 c	4.3 cd	3.2 b	4.2 b	2.1 bc	3.6 b	3.1 bc	4.7 b
L 4	1.7 b	2.3 c	1.7 b		2.2 ab	5.6 c	2.0 a	1.7 ab	1.5 a	2.7 b	4.0 b
L 5	4.1 d	4.6 d	6.5 d	5.8 d	9.6 d	7.6 c	4.6 d	6.8 c	11.3 d	10.4 c
CV(%)	26.5	18.1	21.8	27.8	21.3	24.9	26.0	20.3	15.9	16.3

	Accelerated aging
	TRAD¹			USS²			SSS³
Value	24 h	48 h	72 h	24 h	48 h	72 h	24 h	48 h	72 h
0.62^*	0.66^*	0.75^*	0.48^**	0.65^*	0.90^*	0.67^*	0.73^*	0.75^*

25 mL of water
100 seeds					150 seeds
2 h	4 h	6 h	8 h	24 h	2 h	4 h	6 h	8 h	24 h
-0.53^*	-0.32 ^ns	-0.52^*	-0.87^*	-0.45^**	0.15 ^ns	-0.09 ^ns	0.28 ^ns	0.43^**	-0.87^*
50 mL of water
2 h	4 h	6 h	8 h	24 h	2 h	4 h	6 h	8 h	24 h
-0.33 ^ns	-0.48^**	-0.35 ^ns	-0.61^*	-0.55^*	-0.41^**	-0.58^*	-0.26 ^ns	-0.77^*	-0.56^*
75 mL of water
2 h	4 h	6 h	8 h	24 h	2 h	4 h	6 h	8 h	24 h
-0.55^*	-0.78^*	-0.58^*	-0.77^*	-0.65^*	-0.80^*	-0.75^*	-0.81^*	-0.81^*	-0.77^*