Biochemical changes and physiological quality of corn seeds subjected to different chemical treatments and storage times

Abstract

The chemical treatment of corn seeds is widely adopted for protecting crops at the early stages. However, some molecules interfere in the quality of seeds, especially when stored, by accelerating their deterioration. The objective of this work was to investigate the influence of insecticides on the enzymatic expression and quality of corn seeds subjected to storage. Seeds of the hybrids 2B647PW and SHS4070 were subjected to four different chemical treatments (standard treatment, standard + clothianidin, standard + thiamethoxam, and standard + fipronil) and stored for different periods (0, 3, 6, and 9 months). The quality evaluation included the germination test, first germination count, cold test, and health test. The expression of the enzymes α-amylase, esterase, superoxide dismutase, catalase, and alcohol dehydrogenase were determined by the gel electrophoresis technique. The insecticides clothianidin, thiamethoxam, and fipronil reduce the physiological quality of the seeds of hybrid 2B647PW after nine months of storage. The treatment of seeds with the insecticides clothianidin, thiamethoxam, and fipronil reduces the expression of α-amylase, superoxide dismutase, and catalase enzymes after nine months of storage. The enzymes α-amylase, superoxide dismutase, catalase, and alcohol dehydrogenase are good quality markers for hybrid corn seeds.

Desempenho de sementes de cevada tratadas sob períodos curtos de armazenamento

“…Research, Society and Development, v. 13, n. 6, e14513646187, 2024 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v13i6.46187 9 Além da defesa contra a deterioração natural que a semente está submetida durante o armazenamento, também foi possível verificar que as células das plântulas originadas de sementes sob tratamento manifestaram tentativa de defesa frente ao ambiente de tratamento imposto. Isso justifica o aumento da atividade da enzima catalase, que foi maior na situação em que ocorreu avanço do armazenamento e principalmente quando utilizado o produto Standak Top (Oliveira et al, 2020;Lacerda et al, 2021).…”

Quality of corn seed industrial seed treatment (IST) and on-farm treatment (OFT) in Brazilian agribusiness

“…In contrast, the IST process is performed by the seed producer or a specialized company as part of the seed processing (Brzezinski et al, 2015;Silva et al, 2020). The technique consists of using professionals, products, polymers for adhesion, machines, and specific equipment for seed treatment (Abrasem, 2015;.…”

“…Different products and their compositions can be used in seed treatment, and these factors can positively or negatively affect the physiological quality of seeds (Santos et al, 2018;Carvalho et al, 2022a). Highlighting, some insecticide molecules may cause phytotoxicity, which impairs the germination and vigor of corn seeds (Mariucci et al, 2018;Oliveira et al, 2020), therefore, they demand more attention and a careful use, as it is believed that such negative effect can be enhanced when the treatment is not conducted correctly.…”