Exogenous Ethylene Precursors and Hydrogen Peroxide Aid in Early Seed Dormancy Release in Sweet Cherry

Abstract

Seeds of sweet cherry (Prunus avium) possess a strong endodormancy response that traditionally requires months of stratification before germination can occur. Accelerating artificial dormancy release could be an important aspect of improving progress in a sweet cherry breeding program by increasing the first season growth period. In this study, seeds were exogenously treated with ethephon, 1-aminocyclopropane-1-carboxylic acid (ACC), kinetin, hydrogen peroxide, and acidified nitrite to attempt to induce germination with reduced stratification times. Findings showed that ethephon, ACC, and hydrogen peroxide all significantly increase early seed germination rates. Stratification time had the largest effect on increasing germinations, with significantly higher germination percentages accompanying increased stratification times that plateaued at 3 months of stratification. Stratification is vital for proper seedling development because plants grown from seeds with no stratification are significantly shorter and have reduced internode lengths compared with seeds with 4 weeks of stratification.

Influência do peróxido de hidrogênio no vigor de plântulas de mogno africano

“…Estes resultados evidenciaram que sementes de mogno africano nas diferentes concentrações de H2O2, possa estar relacionado à sinalização celular. Ou seja, as espécies reativas de oxigênio (EROs) interagem com outras moléculas em especial na regulação de fitohormônios, os quais estão envolvidos na ativação ou inibição dos processos de crescimento e desenvolvimento que ocorrem no início da embriogênese (Stein et al, 2021). Assim como nos mecanismos ligados à protrusão radicular e germinação (Hernández Cortés, 2022).…”