Physiological quality of soybean seeds stored after industrial treatments with different chemicals

Abstract

This study aimed to relate the smallest set of variables that compose the quality of soybean seeds lot under study, as well as to evaluate the influence of four industrial seed treatments and their respective slurry volumes on the physiological potential. The experiment was carried out in a completely randomized block design with 4 replicates and 24 treatments. The chemical treatments were: control (T1), micronutrient + polymer + drying powder (T2), bioregulator + polymer + drying powder (T3) and micronutrient + bioregulator + polymer + drying powder (T4). The seeds were stored for periods of 0, 15, 30, 45, 60 and 90 days and were subsequently evaluated for their physiological potential. In each storage period, the variable germination, first count, accelerated aging, emergence speed index, final emergence in the sand substrate, aerial part length, root length and total seedling length were evaluated. The main components of the standard germination test and first count were the ones that most contributed to explaining the variability of the original data. Increasing the volume of the slurry in the industrial seed treatment reduces the physiological quality of soybean seeds during storage.

Interaction of Mechanical Damage and Chemical Treatment and Its Effects on Soybean Seed Physiological Quality

“…In the present study it was found that the lower means from the treatment with TS5 insecticide were probably due to the severity of the mechanical injury associated with the treatment used. However, it is essential to point out that, under the current conditions, chemical products used in seed treatment are able to penetrate the seed fissures and also translocate via seed coat, promoting irreversible damage to vital parts of the embryo, such as plumule and radicle (Taylor & Salanenka, 2012;Pereira et al, 2021). This translocation effect can happen, but it depends on the active ingredient and dosage, thus causing phytotoxicity effect in the first vegetative stages of the plant development.…”

Potencial fisiológico de sementes de soja submetidas ao tratamento industrial com bioestimulante antes e após armazenamento / Physiological potential of soybean seeds submitted to industrial treatment with biostimulant before and after storage

“…A capacidade de mobilização de reservas, em sementes deterioradas apresentam limitações no processo de reorganização celular. Entretanto, sabe-se que essa característica é fundamental para manutenção da permeabilidade seletiva das membranas evitando, assim a exsudação excessiva de eletrólitos para o exterior das células (Marcos-Filho 2015;Marcos-Filho e França-Neto, 2017), nestas condições o armazenamento bem como o volume de calda potencializam os danos causados às sementes (Pereira et al, 2020;Pereira et al, 2021 Os resultados obtidos concordam com Zambon (2013), para estes autores a realização do tratamento das sementes antes da semeadura minimiza os efeitos fitotóxicos das caldas à germinação e estabelecimento de plântulas.…”