Título:	Uniconazole in seed treatment modifies the early growth of maize.
Autoria:	DEMBOCURSKI, D. SCHUELTER, A. R. COELHO, S. R. M. VILAS BOAS, M. A. SOUZA, I. R. P. de MAGALHAES, P. C. MERCANTE, E. CHRIST, D.
Afiliação:	DIOGO DEMBOCURSKI, UNIVERSIDADE ESTADUAL DO OESTE DO PARANÁ; ADILSON RICKEN SCHUELTER, UNIVERSIDADE ESTADUAL DO OESTE DO PARANÁ; SILVIA RENATA MACHADO COELHO, UNIVERSIDADE ESTADUAL DO OESTE DO PARANÁ; MARCIO ANTONIO VILAS BOAS, UNIVERSIDADE ESTADUAL DO OESTE DO PARANÁ; ISABEL REGINA PRAZERES DE SOUZA, CNPMS; PAULO CESAR MAGALHAES, CNPMS; ERIVELTO MERCANTE, UNIVERSIDADE ESTADUAL DO OESTE DO PARANÁ; DIVAIR CHRIST, UNIVERSIDADE ESTADUAL DO OESTE DO PARANÁ.
Ano de publicação:	2025
Referência:	Acta Scientiarum. Agronomy, v. 47, e71944, 2025.
Conteúdo:	In Brazil, corn crops are frequently affected by extreme temperatures and wide variation in water and radiation availability. These factors, coupled with the increasing incidence of pests and diseases and different management practices, limit crop yield. Alternatives that provide increased resilience in plants are of paramount importance, such as the use of growth regulators. This study aimed to investigate the effect of uniconazole (UCZ) applied to corn seeds on the germination, and growth of the shoot and root system at the initial stage of plant development. The experiments consisted of evaluating UCZ doses (0, 50, 100, 150, and 200 mg kg−1 seed) applied to seeds on the viability and vigor of seedlings. Moreover, the effect of UCZ doses on growth and biomass accumulation, root system morphology, contents of chloroplast pigments and nutrients, and leaf reflectance in plants grown up to the V4 stage was also evaluated. UCZ treatment on seeds promoted a delay in the germination process with increasing doses, also leading to a reduction in the shoot size and biomass without an influence on the root system. Vigor assessment showed that increasing UCZ doses applied to the seeds promoted reduction in the shoot size and biomass without changing germination. Plants grown in a greenhouse had inhibition of the initial shoot growth, with the height becoming uniform over time, regardless of the UCZ dose. Root data revealed that increasing the UCZ dose promoted an increase in root length and area with a reduction in diameter. Changes in chlorophyll a and b contents were also detected, in addition to the light absorption capacity depending on the UCZ dose. Seed treatment with UCZ at doses of 100 and 150 mg kg−1 seeds increased Fe, Si, K, Co, Ca, Mg, S, and Na contents in young plants. Lately, UCZ benefited the growth and development of young corn plants.
Thesagro:	Milho Zea Mays Clorofila Sistema Radicular Regulador de Crescimento
NAL Thesaurus:	Triazoles Chlorophyll Root systems Growth regulators
Digital Object Identifier:	http://doi.org/10.4025/actasciagron.v47i1.71944
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPMS)