The Extent and Role of Seed Dormancy in Alpine Plants

Amen, Ralph D.

doi:10.1086/405055

Cited by 106 publications

(66 citation statements)

References 9 publications

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“…Thus, the germination of seeds mainly depends on moisture conditions in the field. Amen (1966) indicated that seeds of alpine species have a high germination capacity immediately after dispersal at high temperatures. This agrees with the results of Shimono and Kudo (2005), Giménez-Benavides et al (2005), Estrelles et al (2010) and with our own results for G. cracoviense.…”

Section: Discussionmentioning

confidence: 99%

The Effect of Temperature, Light and Calcium Carbonate on Seed Germination and Radicle Growth of the Polycarpic Perennial Galium cracoviense (Rubiaceae), a Narrow Endemic Species From Southern Poland

Kołodziejek¹,

Patykowski²

2015

Acta Biologica Cracoviensia S. Botanica

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Germination responses of Galium cracoviense Ehrend. (Rubiaceae), a narrow endemic species from southern Poland, were tested in light and dark conditions at three constant temperatures (5, 10, or 22°C), before and after cold-wet stratification. Additionally, seeds were germinated under different calcium carbonate (CaCO 3 ) concentrations (1, 5, 10, 15, 20, or 25 mM/L CaCO 3 ) at 22°C in light. The high germination capacity of seeds incubated at different temperatures, shortly after collection, already suggested the absence of dormancy in this species. Thus, the seeds are ready to germinate immediately in the field when water resources are available and the temperature is adequate. Light was a significant factor for G. cracoviense; more seeds germinated in light than in darkness at all temperatures tested. Cold stratification decreased germination especially at higher temperatures. The light requirement for G. cracoviense germination ensures their successful germination on or near the soil surface, and in cracks and crevices in limestone, when temperature and edaphic conditions are favourable. Seeds of this species show temperature enforced dormancy throughout the winter. Germination was significantly affected by calcium carbonate. Non-germinated seeds germinated well after being transferred from higher CaCO 3 concentrations to distilled water. The results indicate that the seeds of this species can endure CaCO 3 stress without losing their viability and start germination once CaCO 3 concentration is reduced. It can be concluded that the seeds of this species require lower Ca 2+ ion concentration, moderate temperatures and the presence of light to germinate. K Ke ey y w wo or rd ds s: : Calcium carbonate, dormancy, rare species, recovery.

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Section: Discussionmentioning

confidence: 99%

The Effect of Temperature, Light and Calcium Carbonate on Seed Germination and Radicle Growth of the Polycarpic Perennial Galium cracoviense (Rubiaceae), a Narrow Endemic Species From Southern Poland

Kołodziejek¹,

Patykowski²

2015

Acta Biologica Cracoviensia S. Botanica

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“…from experiments which showed an increased template activity of chromatin isolated from potato tutbers upon emergence from dormancy. The repressioni concept has since received general acceptance (1). It (3,9).…”

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confidence: 99%

Regulation of the Onset of Dormancy in Tubers of Begonia evansiana

Esashi

Leopold

1969

Plant Physiol.

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The concept of dormancy as a condition of repressed genetic information was first proposed by Tuan and Bonner (7). from experiments which showed an increased template activity of chromatin isolated from potato tutbers upon emergence from dormancy. The repressioni concept has since received general acceptance (1). It were supplied with the various inhibitors in the solution used to moisten the filter paper. After the 20 days of dormancy induction, the tubers were rinsed and placed on paper moistened with water.The effectiveness of the dormancy inducing treatments is illustrated in Fig. 1, showing the progress

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“…The temperature at which greatest germination occurs for K. islandica is among the highest observed in plant species from arctic and alpine environments, and is in sharp contrast to the low temperatures optimal for growth in this species (Reynolds, 1984a;Heide and Gauslaa, 1999). This discrepancy (Amen, 1966), together with the almost complete lack of germination at temperatures below 21uC, indicate that all populations except Dovre have a conditional, or temperaturedependent dormancy (Meyer et al, 1989;Shimono and Kudo, 2005). This is also supported by the high viability (.97%) for ungerminated seeds, and may be an important mechanism to avoid mortality caused by late spring frost (Amen, 1966;Billings and Mooney, 1968;Chabot and Billings, 1972).…”

Section: Discussionmentioning

confidence: 82%