ACCELERATED AGING OF Piptadenia moniliformis (BENTH.) SEEDS

Abstract

The accelerated aging test consists of evaluating the vigor of the seeds under conditions of high temperature and humidity, with the purpose of identifying the physiological quality of lots with similar germination. The objective of this study was to evaluate the efficiency of the accelerated aging test for classifying seed lots of P. moniliformis at different levels of vigor. Initially, the seed lots were assessed by means of seedling emergence, life velocity index, shoot length and root length, total dry mass of seedlings and determination of water content, before and after each period of aging. The experimental design for the whole world was based on a 3 × 4 factorial scheme (three seed lots and four periods of 24, 48, 72 and 96 h duration), with separate evaluations at temperatures of 38 °C and 41 °C. The accelerated aging test conducted at a temperature of 41 °C for 24 h was a more suitable combination for separating batches of P. moniliformis according to different levels of vigour, and made it possible to obtain results similar to the classification of lots in relation to the initial quality.

Piptadenia moniliformis Benth. seeds subjected to accelerated aging

“…In Leucaena leucocephala seeds, germination declined in the different lots, increasing the accelerated aging time (Araújo et al, 2017). Considering three P. moniliformis seed lots, Aquino et al (2018) concluded that aging for 24 h at 41°C was the most appropriate condition to separate seed lots into different vigor levels since it produced results similar to those obtained when classifying the initial quality of the lots.…”

“…In the accelerated aging test, less vigorous seeds show a pronounced decline in viability, unlike their more vigorous counterparts, which maintain higher viability and the capacity to produce healthy seedlings (Marcos Filho, 2015). Due to the ease of application and interpretation of its results, several researchers involved with forest seeds have adopted this test, obtaining good results, as observed in studies carried out by several authors on different species (Padilha et al, 2018;Carvalho et al, 2016;Aquino et al, 2018;Araujo et al, 2017;Lima et al, 2014;Guareschi et al, 2015). Piptadenia moniliformis is a species belonging to the family Fabaceae and the Caatinga biome.…”

Germinação De Sementes De Plantas Daninhas Submetidas Ao Teste De Envelhecimento Acelerado

“…Pelo teste de envelhecimento acelerado as sementes são submetidas a condições de elevada umidade e temperatura para análise da qualidade fisiológica (AQUINO et al, 2018), estimado em condições favoráveis e adversas através dos testes de germinação padrão e de vigor (GRZYBOWSKI et al, 2015). Podendo ser empregados para conhecer o desempenho de sementes de plantas daninhas (GRZYBOWSKI et al, 2015).…”

“…Os autores, 2021. Diante às limitações, principalmente relacionadas a distinção da qualidade em função da baixa sensibilidade e à frequente discrepância dos resultados com a emergência das plântulas em campo, o teste de condutividade elétrica é utilizado para avaliar o potencial fisiológico de sementes de diferentes culturas e sua integridade celular (AVELINOet al, 2018;MOURA et al, 2017;ZIEGLER et al, 2017). Em condição de aumento na y = -0,8143x + 262,01 R² = 0…”