The 'Priming' of Seeds

Heydecker, W.; Gibbins, Beryl M.

doi:10.17660/actahortic.1978.83.29

Cited by 53 publications

(38 citation statements)

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“…The term 'priming' was originally introduced in the context of polyethylene glycol (PEG) osmotica treatments at water potentials just below full imbibition; these treatments resulted in more rapid germination on subsequent sowing (Heydecker et al, 1973;Heydecker and Gibbins, 1978). Priming has since been used to describe a wide variety of seed invigoration treatments.…”

Section: Introductionmentioning

confidence: 99%

“…However, when combined with subsequent desiccation, the effect of priming is not consistently positive. In some cases, the benefit to germination is lost on † For Permissions, please email: journals.permissions@oxfordjournals.org desiccation, or partly retained on desiccation but lost rapidly in storage (Heydecker and Gibbins, 1978). Priming has been shown to be both beneficial (Georghiou et al, 1987;Probert et al, 1991;Wechsberg, 1994) and detrimental Tarquis and Bradford, 1992) to subsequent longevity.…”

Section: Introductionmentioning

confidence: 99%

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Priming and re-drying improve the survival of mature seeds of Digitalis purpurea during storage

et al. 2009

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† Background and Aims Most priming studies have been conducted on commercial seed lots of unspecified uniformity and maturity, and subsequent seed longevity has been reported to both increase and decrease. Here a seed lot of Digitalis purpurea L. with relatively uniform maturity and known history was used to analyse the effects of priming on seed longevity in air-dry storage. † Methods Seeds collected close to natural dispersal and dried at 15 % relative humidity (RH), 15 8C, were placed into experimental storage (60 % RH, 45 8C) for 14 or 28 d, primed for 48 h at 0, 21, 22, 25, 210 or 215 MPa, re-equilibrated (47 % RH, 20 8C) and then returned to storage. Further seed samples were primed for 2 or 48 h at 21 MPa and either dried at 15 % RH, 15 8C or immediately re-equilibrated for experimental storage. Finally, some seeds were given up to three cycles of experimental storage and priming (48 h at 21 MPa). † Key Results Priming at 21 MPa had a variable effect on subsequent survival during experimental storage. The shortest lived seeds in the control population showed slightly increased life spans; the longer lived seeds showed reduced life spans. In contrast, seeds first stored for 14 or 28 d before priming had substantially increased life spans. The increase tended to be greatest in the shortest lived fraction of the seed population. Both the period of rehydration and the subsequent drying conditions had significant effects on longevity. Interrupting air-dry storage with additional cycles of priming also increased longevity. † Conclusions The extent of prior deterioration and the post-priming desiccation environment affect the benefits of priming to the subsequent survival of mature seeds. Rehydration-dehydration treatments may have potential as an adjunct or alternative to the regeneration of seed accessions maintained in gene banks for plant biodiversity conservation or plant breeding.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Priming and re-drying improve the survival of mature seeds of Digitalis purpurea during storage

et al. 2009

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“…In spite of this, the positive effects of priming were still noticeable in some cultivars. In general, the sensitivity of seeds to dehydration .increases with the priming incubation time (Heydecker and Gibbins, 1978). In our conditions, the time of priming incubation was short (7 d) when compared to periods of 21 d (at 10°C) used by Singh, Morss and Orton (1985), also working with celery.…”

Section: Discussionmentioning

confidence: 81%

“…However, in general, they showed lower T50 values than control and LN treatments. Heydeckerand Gibbins (1978) stated that some of the advantages of priming can be lost if seeds are subsequently desiccated. In our experiments, seeds were always desiccated after primingto eliminate the adverse effects of high moisture contents on cryopreservation.…”

Section: Discussionmentioning

confidence: 99%

Effects of seed cryopreservation and priming on germination in several cultivars of

et al. 1995

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Seed germination of seven celery cultivars was studied after storage in liquid nitrogen for I or 30 d. Cryopreservation was also carried out on pelleted and primed seeds. None of the treatments applied reduced germination percentages. T 50 (time for germination to reach 50%) significantly decreased in Florida, Utah and Istar cultivars when priming, alone or in combination with cryopreservation, was used.

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“…Várias técnicas têm sido propostas para reduzir o tempo necessário entre a semeadura e a emergência das plântulas, bem como aumentar a tolerância das sementes às condições adversas existentes nesse período; assim o condicionamento osmótico das sementes, proposto por Heydecker & Gibbins (1978), entre outras tecnologias, consiste em um pré-tratamento no qual as sementes são condicionadas em solução osmótica por períodos de tempo e temperaturas determinados (Khan et al,1978). O potencial osmótico da solução regula a hidratação das sementes, permitindo a ativação de processos metabólicos nas fases iniciais da germinação e, paralelamente, evitando a emergência da radícula (Bradford, 1986;Khan, 1992 …”

Section: Introductionunclassified

Germinação de sementes de alface submetidas a condicionamento osmótico durante o armazenamento

Fessel

Vieira

Rodrigues

et al. 2002

Sci. agric. (Piracicaba, Braz.)

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*Autor correspondente RESUMO: Em algumas espécies a técnica do condicionamento osmótico permite a obtenção de uma germinação rápida e uniforme. A pesquisa teve por objetivo verificar a eficiência do condicionamento osmótico de sementes de alface sobre a sua germinação. Sementes dos cultivares Mesa 659, Nabuco RS e Verônica, com dois níveis de viabilidade, foram submetidas ao condicionamento osmótico em solução (0,35 mol) de manitol por períodos de 3, 4, 5 e 6 dias sob 20o C e em presença de luz. A seguir, as sementes foram submetidas à secagem (32 o C) por 12 horas em estufa com circulação de ar. As avaliações foram feitas pelo teste padrão de germinação aos 0, 10, 20, 30, 60 e 90 dias após o condicionamento e secagem das sementes. Utilizou-se o delineamento experimental inteiramente casualizado, com quatro repetições de 50 sementes, em esquema fatorial 2 × 5 × 6, (dois níveis de vigor; cinco períodos de condicionamento osmótico e seis períodos de armazenamento após secagem). A resposta de sementes de alface ao condicionamento osmótico varia em função do cultivar e do período de condicionamento osmótico. Palavras-chave: Lactuca sativa, manitol GERMINATION OF LETTUCE SEEDS SUBMITTED TO OSMOTIC PRIMING DURING STORAGEABSTRACT: In some species the osmopriming technique allows rapid and uniform germination of seeds. This research studies the efficiency of osmopriming on the germination of lettuce seeds. Seeds of the cultivars Mesa 659, Nabuco RS and Verônica were osmoprimed with a mannitol solution (0.35 mol) for periods of 3, 4, 5, and 6 days, at the temperature of 20 o C and under daylight. After priming seeds were dried for 12 hours in an oven at 32 o C. Evaluation of osmopriiming efficiency was performed by the standard germination test 0, 10, 20, 30, 60 and 90 days after priming, in a complete randomized design with four replications, 50 seeds per replicate. Data were submitted to analysis of variance in a factorial arrangement 2 × 5 × 6 (2 levels of vigor; 5 periods of osmopriming and 6 periods of storage after drying). The effect of osmopriming on lettuce seeds varied depending on the cultivar and priming period.

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The 'Priming' of Seeds

Cited by 53 publications

References 0 publications

Priming and re-drying improve the survival of mature seeds of Digitalis purpurea during storage

Priming and re-drying improve the survival of mature seeds of Digitalis purpurea during storage

Effects of seed cryopreservation and priming on germination in several cultivars of

Germinação de sementes de alface submetidas a condicionamento osmótico durante o armazenamento

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