Evaluation of temperature models for predicting bud burst in Norway spruce

Hannerz, Mats

doi:10.1139/cjfr-29-1-9

Cited by 24 publications

(32 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…considerably after the time when the chilling requirement is usually met. This was noted for Norway spruce by Hannerz (1999), who analysed bud burst of 17 spruce clones for up to 7 years in field trials in Sweden. His study was carried out with rooted cuttings of chronologically old clones which were expected to correspond ecophysiologically to mature trees.…”

Section: Introductionmentioning

confidence: 75%

Bud burst in Norway spruce (Picea abies): preliminary evidence for age-specific rest patterns

Partanen¹,

Hänninen

Häkkinen³

2004

Trees

View full text Add to dashboard Cite

This study examines the effect of chilling and photoperiod on rest completion and bud burst in Norway spruce [Picea abies (L.) Karst.] using twigs from both 15-year-old ("young trees") and 56-year-old ("old trees") trees. The material was transferred between September and May from outdoors to experimental forcing conditions with four different photoperiods. The bud burst percentage of the twigs from young trees generally increased in all photoperiods until the end of the year. After that it decreased until vernal equinox (March 20) and then increased steeply towards spring. This new observation of transient rest completion during autumn suggests that young trees have (I) a transient time window during late autumn when ontogenetic development is possible, and (ii) a secondary rest culminating approximately at the time of vernal equinox. In twigs from old trees the transient rest completion was much weaker as the bud burst percentages generally remained under 20 during autumn and winter. At vernal equinox there were no burst buds in twigs from the old trees in any photoperiod and after that the bud burst percentage increased basically in the same manner as in the young trees. The bud burst percentage of the twigs from young trees was generally higher as the photoperiod increased. However, no evidence for absolute long photoperiod requirement of rest completion was observed.

show abstract

Section: Introductionmentioning

confidence: 75%

Bud burst in Norway spruce (Picea abies): preliminary evidence for age-specific rest patterns

Partanen¹,

Hänninen

Häkkinen³

2004

Trees

View full text Add to dashboard Cite

show abstract

“…4). Some studies observed that the evolution of cold deacclimation is correlated with budbreak time in natural populations (Hannerz 1999). Indeed, between locations, deacclimation started later in mountain climate, limited by cold temperatures.…”

Section: Ecodormancy and Cold Deacclimationmentioning

confidence: 99%

Are budburst dates, dormancy and cold acclimation in walnut trees (Juglans regia L.) under mainly genotypic or environmental control?

et al. 2011

View full text Add to dashboard Cite

As observed for most stresses, tree frost resistance can be split into two main processes: avoidance and tolerance. Avoidance of freezing is achieved by introducing species only in the climatic context in which the probability of freezing events is very low for the sensitive stages of buds or stems; i.e., when good synchronism exists between the annual cycle and the critical climatic periods. Buds become able to grow only after chilling requirements have been satisfied (endodormancy released) during winter; they subsequently break after heat requirements have been completed (end of ecodormancy) in early spring. Actually, this period is often subject to more or less severe freezing events. Trees are also able to adjust their freezing tolerance by increasing their capacity of extracellular freezing and decreasing the possibility of intracellular freezing through the process of frost acclimation. Both freezing resistance processes (avoidance and tolerance) are environmentally driven (by photoperiod and temperature), but there are also genotypic effects among species or cultivars. Here, we evaluated the degree to which differences in dormancy release and frost acclimation were related to environmental and genetic influences by comparing trees growing in common garden conditions. This investigation was carried out for two winters in lowland and mountain locations on different walnut genotypes differing significantly for budburst dates. Chilling requirement for endodormancy release and heat requirement during ecodormancy were evaluated in all situations. In addition, frost acclimation was assessed by the electrolyte leakage method on stems from the same trees before leaf fall through budburst. No significant differences were observed in chilling requirements among genotypes. Moreover, frost acclimation dynamics were similar between genotypes or locations when expressed depending on chilling units accumulated since 15 September as a time basis instead of Julian day. The only exception was for maximal frost hardiness observed during winter with the timber-oriented being significantly more resistant than fruit-oriented genotypes. Heat requirement was significantly different among genotypes. Thus, growth was significantly faster in fruit-oriented than in wood-oriented genotypes. Furthermore, among wood-oriented genotypes, differences in growth rate were observed only at cold temperatures. Frost acclimation changes differed significantly between fruit- and wood- walnuts from January through budburst. In conclusion, from September through January, the acclimation dynamic was driven mainly by environmental factors whereas from January through budburst a significant genotype effect was identified in both frost tolerance and avoidance processes.

show abstract

“…There have been attempts to base phenological modeling on physiological aspects (Hänninen 1994) rather than empirical temperature sums (Hunter and Lechowicz 1992;Worrall 1993;Diekmann 1996;Hannerz 1999) or observed relationships between chilling and temperature sums (Cannel and Smith 1983;Murray et al 1989;Hunter and Lechowicz 1992). Hänninen (1994) concentrates on the distinct phases of ontogenetic development of tree buds that have been identified by many authors (Samish 1954;Smith and Kefford 1964;Vegis 1964) and their relation to external factors, mainly temperature and photoperiod.…”

Section: Phenological Modelsmentioning

confidence: 99%

“…All these models, however, have so far been applied either to data sets of limited size for single species (Cannell and Smith 1983;Hannerz 1999), small data sets from a geographically limited region (Kramer 1994(Kramer , 1995Murray et al 1989) or to clones (Diekmann 1996;Menzel 1997). When the phenology of a wider geographical region, including several species and provenances, is to be modeled to simulate the sensitivity of regional carbon budgets to climate change or validate satellite observations, the limitations of these models with their parameterizations need to be tested.…”

Section: Introductionmentioning

confidence: 99%

Physiology-based phenology models for forest tree species in Germany

Schaber

Badeck

2003

International Journal of Biometeorology

178

140

View full text Add to dashboard Cite

Models of phenology are needed for the projection of effects of a changing climate on, for example, forest production, species competition, vegetation-atmosphere feedback and public health. A new phenology model for deciduous tree bud burst is developed and parameters are determined for a wide geographical range (Germany) and several forest tree species. The new model is based on considerations of simple interactions between inhibitory and promotory agents that are assumed to control the developmental status of a plant. Several alternative model structures were formulated emphasizing different hypothetical physiological processes. The new models fitted the observations better than classical models. The bias of the classical models, i.e. overestimation of early observations and underestimation of late observations, could be reduced but not completely removed. Differences in the best-fitting model equations for each species indicated that, for the late spring phases (bud burst of Fagus sylvatica and Quercus robur), the photoperiod played a more dominant role than for early spring phases (bud burst of Betula pendula and Aesculus hippocastanum). Chilling only plays a subordinate role for spring bud burst compared to temperatures preceding this event in our data. The presented modeling approach allowed for a species-specific weighting of the dominant processes. The model results are in accordance with experimental findings that indicate an important role of day length in late spring BB. Potentials for model improvement are discussed.

show abstract

Evaluation of temperature models for predicting bud burst in Norway spruce

Cited by 24 publications

References 0 publications

Bud burst in Norway spruce (Picea abies): preliminary evidence for age-specific rest patterns

Bud burst in Norway spruce (Picea abies): preliminary evidence for age-specific rest patterns

Are budburst dates, dormancy and cold acclimation in walnut trees (Juglans regia L.) under mainly genotypic or environmental control?

Physiology-based phenology models for forest tree species in Germany

Contact Info

Product

Resources

About