Aluminium toxicity: oxidative stress during germination and early development in purple maize

Alves, Rafael Mateus; Silva, Monalisa Alves Diniz da; Hermínio, Pedro José; Silva, Elania Freire da; Araújo, Anna Beatriz Nogueira de; Silva, Gabriel Italo Novaes da

doi:10.5935/1806-6690.20220039

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Scientific Article • Rev. Ciênc. Agron. 53 • 2022 • https://doi.org/10.5935/1806-6690.20220039 copy

Aluminium toxicity: oxidative stress during germination and early development in purple maize¹ 1 Parte da monografia do primeiro autor, apresentada para obtenção do título de Engenheiro Agrônomo pela Universidade Federal Rural de Pernambuco (UFRPE), Unidade Acadêmica de Serra Talhada (UAST).

Toxidez por alumínio: estresse oxidativo durante a germinação e desenvolvimento inicial de milho roxo

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Purple maize is a source of natural pigments that can be used for various industrial purposes; however, soil contamination from aluminium affects production. The aim of this study was to evaluate the effect of aluminium toxicity associated with different temperatures on seed germination and initial development in purple maize seedlings, through germination, initial seedling growth and indicators of oxidative damage. The experimental design was completely randomised in a 5×2 factorial scheme (concentrations × temperatures). The parameters under evaluation were germination percentage, length and total dry weight of the root system and shoots, and indicators of oxidative damage (chlorophyll a, chlorophyll b and total chlorophyll, total carotenoids and lipid peroxidation) at the seedling stage. Aluminium chloride concentrations have no effect on seed germination in purple maize. With increasing aluminium concentrations, the length, dry weight, chlorophyll a, chlorophyll b, total chlorophyll and total carotenoids of normal purple maize seedlings are reduced, while lipid peroxidation increases. Aluminium toxicity stress in purple maize seedlings can be detected using biochemical indicators (chlorophyll a, chlorophyll b and total chlorophyll, total carotenoids and lipid peroxidation).

Keywords:
Zea mays ; Physiological potential; Natural pigments

Source of variation	Mean square
	DF	GP	SL	RL	SDW	RDW	TDW
	DF	(%)	(cm seedling^-1)		(g seedling^-1)
Al³⁺ concentrations	4	16.7^ns	5.3^*	4.8^*	0.0005^*	0.0008^*	0.002^*
Temperature	1	16.9^ns	0.06^ns	0.2^ns	0.001^*	0.001^*	0.01^*
Al³⁺ concentration × Temperature	4	11.6^ns	2.25^*	1.7^ns	0.000^ns	0.0002^ns	0.0002^ns
Error	30	48.1	0.6	1.9	0.00009	0.00004	0.0002
Total	39	-	-	-	-	-	-
CV (%)	-	4.64	7.97	3.3	21.68	15.23	15.56

Source of variation	Mean square
	DF	Total chlorophyll	Chlorophyll a	Chlorophyll b	Total carotenoids	TBARS content
	DF	Total chlorophyll	Chlorophyll a	Chlorophyll b	Total carotenoids	SH	RS
Al³⁺ concentrations	4	0.06^*	0.05^*	0.001^*	0.00009^*	47252.1^**	43277.5^**
Temperature	1	0.0^ns	0.0^ns	0.0003^ns	0.00002^ns	12352.5^*	12670.3^**
Al³⁺ concentration × Temperature	4	0.004^ns	0.003^ns	0.0009^ns	0.00002^ns	4068.1^ns	5133.20^**
Error	20	0.005	0.005	0.0002	0.00002	2077.3	1011.7
Total	29	-	-	-	-	-	-
CV (%)	-	22.45	25.78	27.11	28.72	29.24	22.48

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Aluminium toxicity: oxidative stress during germination and early development in purple maize1 1 Parte da monografia do primeiro autor, apresentada para obtenção do título de Engenheiro Agrônomo pela Universidade Federal Rural de Pernambuco (UFRPE), Unidade Acadêmica de Serra Talhada (UAST).

Toxidez por alumínio: estresse oxidativo durante a germinação e desenvolvimento inicial de milho roxo

ABSTRACT

Aluminium toxicity: oxidative stress during germination and early development in purple maize¹ 1 Parte da monografia do primeiro autor, apresentada para obtenção do título de Engenheiro Agrônomo pela Universidade Federal Rural de Pernambuco (UFRPE), Unidade Acadêmica de Serra Talhada (UAST).