The effect of parsley seed hydration treatment and pelleting on seed vigour

Abstract

The effect of two priming techniques: hardening (prehydration treatment) and solid matrix priming (SMP) was studied on the seeds of two parsley varieties (Cukrowa and Berlińska) in 3-year laboratory experiments. On the images obtained from scanning electron microscope (SEM) there is a parsley embryo developing during germination up to the moment of radicle emergence. On the surface of primed seeds, in particular using the hardening method, lateral cracks are visible. The respiratory activity of primed seeds was similar to that of non-primed in the period of initial 24 h of germination, but significantly higher after 48 h. As compared to non primed seeds solid matrix priming significantly increased the percentage and the speed of germination. Nevertheless, pelleting reduced the positive effect of priming on the germination ability, without affecting the germination speed. After 18 months of storage, the vigour of primed seeds, particularly through hardening, had significantly decreased.

Effect of parsley seed treatment on root yield

“…The differences found in germination ability of differently treated seeds (Podlaski et al 2003) were below 10 per cent while the differences in the percentage of field emergence were above 200 per cent. Seed treatment positively influenced percentage, speed and synchrony of parsley field emergence.…”

“…Pre-sowing treatment techniques included the following combinations: non-pelleted seeds = control, hardening, SMP A, SMP B primed seeds. Two methods of priming were employed: hardening (prehydration treatment) and solid matrix priming (SMP) with two different solid substances: substance A chemically inactive ceramic rubbles with granule diameter of 33.5 mm and chemically active substance B of 23.5 mm granule diameter (Podlaski et al 2003). Pelleting was applied to control, hardened and SMP B treated seeds.…”

Qualidade fisiológica de sementes de algodoeiro submetidas ao condicionamento mátrico e osmótico

“…Em parte, esses resultados concordam com as afirmações de Lagerwerff et al (1961), que enfocaram que o PEG não causa toxicidade às sementes, podendo melhorar a sua qualidade fisiológica. Por outro lado, pode promover a proliferação de fungos durante os ensaios de laboratório (Podlaski et al, 2003).…”

“…Esses resultados, provavelmente, são decorrentes da elevada proliferação de fungos durante os testes laboratoriais, estando em conformidade com Podlaski et al (2003), quando admitiram que o condicionamento osmótico tem como efeito negativo promover o desenvolvimento de fungos nas sementes durante o tratamento, apesar de as sementes terem sido tratadas com hipoclorito de sódio.…”

“…O PEG 6000 é considerado um sal orgânico e quimicamente inerte, por não apresentar toxicidade para as sementes. Entretanto, Podlaski et al (2003) observaram que o condicionamento osmótico tem como efeito negativo promover o desenvolvimento de fungos nas sementes durante o condicionamento.…”