Effect of Stratification Temperature and Germination Temperature on Germination and the Induction of Secondary Dormancy in Common Ragweed Seeds

Willemsen, Roger

doi:10.1002/j.1537-2197.1975.tb12333.x

Cited by 44 publications

(38 citation statements)

References 19 publications

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“…the number of plants in the region). This is because Ambrosia seeds require moist chilling (stratification) before they can germinate (Pickett and Baskin 1973;Willemsen 1975;Baskin 1977, 1980). Ambrosia plants that emerge earlier have been shown to grow larger, and Ambrosia pollen production is directly correlated with biomass (Rogers et al 2006;Fumanal et al 2007).…”

Section: Discussionmentioning

confidence: 99%

Is the recent decrease in airborne Ambrosia pollen in the Milan area due to the accidental introduction of the ragweed leaf beetle Ophraella communa?

Bonini¹,

Šikoparija

Prentović

et al. 2015

Aerobiologia

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This study aims to determine whether a significant decrease in airborne concentrations of Ambrosia pollen witnessed in the north-west of the Province of Milan in Northern Italy could be explained by environmental factors such as meteorology, or whether there is evidence to support the hypothesis that the decrease was related to the presence of large numbers of the oligophagous Ophraella communa leaf beetles that are used as a biological control agent against Ambrosia in other parts of the world. Airborne concentrations of Ambrosia, Cannabaceae and Urticaceae pollen data (2000-2013) were examined for trends over time and correlated with meteorological data. The amount of Ambrosia pollen recorded annually during the main flowering period of Ambrosia (AugustSeptember) was entered into linear regression models with meteorological data in order to determine whether the amount of airborne Ambrosia pollen recorded in 2013 was lower than would normally be expected based on the prevailing weather conditions. There were a number of significant correlations between concentrations of airborne Ambrosia, Cannabaceae and Urticaceae pollen, as well as between airborne pollen concentrations and daily and monthly meteorological data. The linear regression models greatly overestimated the amount of airborne Ambrosia pollen in 2013. The results of the regression analysis support the hypothesis that the observed decrease in airborne Ambrosia pollen may indeed be related to the presence of large numbers of O. communa in the Milan area, as the drastic decrease in airborne Ambrosia pollen in 2013 cannot be explained by meteorology alone.

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Section: Discussionmentioning

confidence: 99%

Is the recent decrease in airborne Ambrosia pollen in the Milan area due to the accidental introduction of the ragweed leaf beetle Ophraella communa?

Bonini¹,

Šikoparija

Prentović

et al. 2015

Aerobiologia

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“…Other Galium species exhibit strong seed dormancy. Since stratified seeds germinated well at moderate (22°C) temperature, G. cracoviense might be expected to establish dense populations even when the seeds are dispersed in fields abandoned in early or late summer (Willemsen, 1975).…”

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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“…The primary dormancy of A. artemisiifolia is mainly due to the presence of inhibitors such as phenolic compounds (similar to chlorogenic acid) and abscissic acid [11], while in A. trifida seed dormancy can be attributed to an inhibitory mechanism within the embryo (embryo dormancy) or constraints on the embryo imposed by the embryo-covering structures (coat-imposed dormancy) [12,13]. For both species prolonged periods of cold stratification (several weeks at 4-5°C), simulating what occurs under field conditions in the winter season, remove primary seed dormancy promoting germination [14][15][16]. Particular conditions occurring during stratification (ie alternating temperature regimes in darkness conditions) can induce in A. artemisiifolia a secondary dormancy [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…A. trifida non-dormant seeds germinate under a wide range of temperatures (from 8 to 41°C) with an optimum between 20 and 24°C [19]. Emergence of common ragweed seedlings occurs mainly from soil surface and drastically decreases by increasing planting depth [15]. Abul-Fatih and Bazzaz [19] reported that giant ragweed emerged from seeds buried over a range of depths from 0.5 to 16 cm, but maximum emergence occurred when seeds were buried at 1 to 4 cm.…”

Section: Introductionmentioning

confidence: 99%

Germination ecology of Ambrosia artemisiifolia L. and Ambrosia trifida L. biotypes suspected of glyphosate resistance

et al. 2013

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The germination ecology of Ambrosia artemisiifolia and A. trifida glyphosate susceptible biotypes sampled in marginal areas, was compared with that of the same species but different biotypes suspected of glyphosate resistance, common and giant ragweed, respectively. The suspected resistant biotypes were sampled in Roundup Ready® soybean fields. Within each weed species, the seeds of the biotype sampled in marginal area were significantly bigger and heavier than those of the biotype sampled in the soybean fields. A. artemisiifolia biotypes exhibited a similar dormancy and germination, while differences between A. trifida biotypes were observed. A. artemisiifolia biotypes showed similar threshold temperature for germination, whereas, the threshold temperature of the susceptible A. trifida biotype was half as compared to that of the resistant A. trifida biotype. No significant differences in emergence as a function of sowing depth were observed between susceptible A. artemisiifolia and suspected resistant A. trifida biotype, while at a six-cm seedling depth the emergence of the A. artemisiifolia susceptible biotype was 2.5 times higher than that of the A. trifida suspected resistant biotype. This study identified important differences in seed germination between herbicide resistant and susceptible biotypes and relates this information to the ecology of species adapted to Roundup Ready® fields. Information obtained in this study supports sustainable management strategies, with continued use of glyphosate as a possibility.

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Effect of Stratification Temperature and Germination Temperature on Germination and the Induction of Secondary Dormancy in Common Ragweed Seeds

Cited by 44 publications

References 19 publications

Is the recent decrease in airborne Ambrosia pollen in the Milan area due to the accidental introduction of the ragweed leaf beetle Ophraella communa?

Is the recent decrease in airborne Ambrosia pollen in the Milan area due to the accidental introduction of the ragweed leaf beetle Ophraella communa?

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

Germination ecology of Ambrosia artemisiifolia L. and Ambrosia trifida L. biotypes suspected of glyphosate resistance

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