Réponse germinative des graines de l’aulne glutineux et du bouleau pubescent à l’application d’acide gibbérellique et de traitements d’amorçage en combinaison avec du froid

Atrip, Norberto De; O'Reilly, Conor

doi:10.1051/forest:2007015

Cited by 9 publications

(5 citation statements)

References 24 publications

(33 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During winter, seeds are exposed to a moist-chilling condition resulting in a widening of the range of temperatures suitable for germination. The beneficial effect of moist pre-chilling on germination of Betula pendula is well documented (Atkinson 1992;Vanhatalo et al 1996;De Atrip and O'Reilly 2007;Tylkowski 2012). This study confirmed that a pre-chill improved the germination capacity and germination rate, and widened the thermal thresholds for germination in all provenances.…”

Section: Discussionmentioning

confidence: 99%

Using thermal time models to predict germination of five provenances of silver birch (<i>Betula pendula</i> Roth) in southern England

Midmore¹,

McCartan²,

Jinks³

et al. 2015

Silva Fenn.

View full text Add to dashboard Cite

Using thermal time models to predict germination of five provenances of silver birch (Betula pendula Roth) in southern England Midmore E. K., McCartan S. A., Jinks R. L., Cahalan C. M. (2015). Using thermal time models to predict germination of five provenances of silver birch (Betula pendula Roth) in southern England. Silva Fennica vol. 49 no. 2 article id 1266. 12 p. Highlights• Using cumulative germination data, thermal time models were developed for Betula pendula.• Models indicated varying degrees of dormancy and pre-chill requirements among provenances.• Thermal time parameters were used with climatic data to predict germination times under mild and cold winters in southern England.• Predictions suggest that pre-chilled French seeds would germinate about six weeks later than the fastest germinating provenance. AbstractClimate predictions indicate that growing conditions may become unfavourable for certain tree species in parts of Britain. Guidelines suggest some planting of seed sources from regions between 2° and 5° south of those currently used as part of a climate change adaptation strategy. However, there has been little research on the benefits and risks associated with the use of planting stock from more southerly seed sources. Seeds of five provenances of the 'relatively' dormant Betula pendula were germinated over a range of temperatures both with and without a pre-chill. Subsequently, a thermal time model was used to predict the impact of migrating these provenances to southern England. Results identified geographical differences in germination response; those from higher latitude were more sensitive to pre-chill.

show abstract

Section: Discussionmentioning

confidence: 99%

Using thermal time models to predict germination of five provenances of silver birch (<i>Betula pendula</i> Roth) in southern England

Midmore¹,

McCartan²,

Jinks³

et al. 2015

Silva Fenn.

View full text Add to dashboard Cite

show abstract

“…We established three treatments with different chilling duration: 15 days (T1), 30 days (T2) and 45 days (T3) and a control treatment, where seeds were not chilled (C). Chilling consisted of adjusting seeds to a moisture level of 33 % at 4 °C in darkness, conditions that have been reported to break dormancy while avoiding seed germination and deterioration ( De Atrip and O’Reilly 2007 ). Seed moisturizing was achieved by adding distilled water on seeds placed in 1.5ml microtubes ( Jones and Gosling 1994 ).…”

Section: Methodsmentioning

confidence: 99%

Genetic variation in early fitness traits across European populations of silver birch (Betula pendula)

et al. 2020

View full text Add to dashboard Cite

Given that the ecological niche of tree species is typically narrower for earlier life stages, intraspecific genetic variation at early fitness traits may greatly influence the adaptive response of tree populations to changing environmental conditions. In this study, we evaluated genetic variation in early fitness traits among 12 populations of Betula pendula from a wide latitudinal range in Europe (41–55°N). We first conducted a chamber experiment to test for population differences in germination and the effect of pre-chilling treatment on seed dormancy release. We then established three common gardens spread across the species latitudinal range in order to evaluate levels of quantitative genetic variation and genotype-by-environment interaction at different early life traits. Our results showed significant variation in chamber germination rates among populations (0–60 %), with southern populations exhibiting lower germination. Pre-chilling treatments did not generally improve germination success. Population seedling emergence rates in the field were correlated with chamber germination rates, though being an order of magnitude lower, with an average ranging from 0 to 1.3 % across gardens. Highly significant variation was found in field emergence rates among populations, and between seed-crop years within populations, but not among families within populations. Populations differed in seedling height, diameter, slenderness and budburst date, with significant among-family variation. Population latitude was positively associated with chamber germination rate and with seedling emergence rate in one of the central field sites. Overall, genetic, environmental and demographic factors seem to influence the observed high levels of variation in early fitness traits among B. pendula populations. Our results suggest limited regeneration capacity for the study species under drier conditions, but further field trials with sufficient replication over environments and seed crops will improve our understanding of its vulnerability to climate change.

show abstract

“…Wick and others (2008) recommended a 24-h water soak followed by a 60-d cold, moist stratification at 3 °C (37.4 °F). Because the seed in the present study originated from different locations but were collected, extracted, stored, stratified, and germinated in similar conditions as for past experiments, seed germination variability among the seed locations may have been attributable to a number of other factors including seed quality and maturity, weather conditions during seed maturation, and genetics (Atrip and O'Reilly 2007). In addition, Ann Smreciu (personal communication 2015) has observed and suggested that green alder seed will lose substantial viability without prompt extraction and cold storage.…”

Section: R E S U L T S a N D Discussion Length Of Cold-stratmentioning

confidence: 99%

Length of cold stratification period affects germination in green alder (Alnus viridis(Chaix) DC. subsp.crispa(Aiton) Turrill) seed collected from northwestern Alberta

Kaur¹,

Schoonmaker²,

Sobze³

2016

NPJ

View full text Add to dashboard Cite

Alnus viridis (Chaix) DC. subsp. crispa (Aiton) Turrill (Betulaceae), commonly known as green alder or mountain alder, is a boreal shrub used to revegetate disturbed lands because of its ability to persist and flourish in adverse conditions. Cold stratification, as a seed pretreatment, has been effective in breaking the embryo dormancy of green alder seed; however, the recommended duration of cold stratification varies from 0 to 60 d. To determine the optimum time for seed collection and the impact of duration of cold stratification, seed was collected from 3 locations in 2013. One location was chosen for collection of seed over 3 consecutive mo. Seed was subjected to 4 cold stratification treatments at +4 °C (39.2 °F), and we included a non-treated control. Mean germination time was significantly lower with cold-stratified seed than with the non-stratified seed. Green alder seed showed more rapid and uniform germination when cold stratified for 2 wk or 6 wk as compared to 12 wk of stratification or non-stratified. Germination rate of green alder seed was similar over a 3-mo collection period from late summer to fall.

show abstract

Réponse germinative des graines de l’aulne glutineux et du bouleau pubescent à l’application d’acide gibbérellique et de traitements d’amorçage en combinaison avec du froid

Cited by 9 publications

References 24 publications

Using thermal time models to predict germination of five provenances of silver birch (<i>Betula pendula</i> Roth) in southern England

Using thermal time models to predict germination of five provenances of silver birch (<i>Betula pendula</i> Roth) in southern England

Genetic variation in early fitness traits across European populations of silver birch (Betula pendula)

Length of cold stratification period affects germination in green alder (Alnus viridis(Chaix) DC. subsp.crispa(Aiton) Turrill) seed collected from northwestern Alberta

Contact Info

Product

Resources

About