The temperature dependence of dormancy breaking in plants: Mathematical analysis of a two-step model involving a cooperative transition

Fishman, Svetlana; Erez, A.; Couvillon, G. A.

doi:10.1016/s0022-5193(87)80221-7

Cited by 353 publications

(242 citation statements)

References 9 publications

Supporting

Mentioning

236

Contrasting

Unclassified

Order By: Relevance

“…A close relationship between winter temperature and RU accumulation has also been found in southeastern United States (Byrne & Bacon 1992), whereas Pitacco (1990) showed that RU, dynamic chill units (Fishman et al 1987), and hours below 7°C all accumulated in a similar fashion during winter in northern Italy. However, Sunley et al (2006) Mean monthly temperature (°C) units can change under very cool conditions.…”

Section: Chill Unitsmentioning

confidence: 55%

Modelling flower production of kiwifruit (Actinidia deliciosa) from winter chilling

Snelgar¹,

Hall

McPherson

2008

New Zealand Journal of Crop and Horticultural Science

View full text Add to dashboard Cite

In warm areas of New Zealand the productivity of kiwifruit vines (Actinidia deliciosa) can be limited by the low number of flowers produced following a warm winter. Our objective was to formulate a model that quantifies how temperatures, use of hydrogen cyanamide (HC), and orchard location affect flower production of kiwifruit vines. Flowering of kiwifruit vines, and winter temperatures, were monitored in a range of climates in New Zealand for 6 years. Mean winter temperatures for the period May-July ranged from 7.6 to 14.1°C. Over this range the average number of king flowers per winter bud decreased from 2.4 to 0.2 as the temperature increased. Although spraying vines with HC increased the number of king flowers, flower production on treated vines still decreased as the winter temperature increased, in a similar manner to control vines. The number of flowers per winter bud could be modelled using factors for usage of HC, long-term mean annual temperature, and mean winter temperature (r 2 = 0.87). On vines that had not been sprayed with HC, the number of king flowers per winter bud increased by 0.45 for every 1°C decrease in mean winter temperature.

show abstract

Section: Chill Unitsmentioning

confidence: 55%

Modelling flower production of kiwifruit (Actinidia deliciosa) from winter chilling

Snelgar¹,

Hall

McPherson

2008

New Zealand Journal of Crop and Horticultural Science

View full text Add to dashboard Cite

show abstract

“…23 Chill unit models provide information on how cultivars fare under the current and future climate conditions, inform producers of the stage of phenological development during the growing season and prediction of maturity dates which improve market delivery of fruits. Three important monitoring systems for chill units have been commonly applied: the Utah (Richardson) model 24 measuring RCU, the Infruitec model (daily positive Utah model) measuring Infruitec chill units and the dynamic chill model 25,26 measuring dynamic chill portion (DCP). Studies on winter chill and chilling requirements often implicitly assume that all models can be used interchangeably because the choice of model is not important.…”

Section: Impact Of Climate Change On Chill Unit Accumulationmentioning

confidence: 99%

“…This model has been established to give a more precise estimate of winter chilling in regions with mild winters, as well as in areas suffering from very cold winters. 32 The dynamic model 25,26 was introduced in the 1980s as a new concept for the negation process 32 . This model is based on the premise that winter chill accumulates as a result of a two-step process.…”

Section: Impact Of Climate Change On Chill Unit Accumulationmentioning

confidence: 99%

simulation study on the effect of climate change on crop water use and chill unit accumulation

Ogundeji¹,

Jordaan²

2017

S. Afr. J. Sci.

View full text Add to dashboard Cite

Climate change and its impact on already scarce water resources are of global importance, but even more so for water scarce countries. Apart from the effect of climate change on water supply, the chill unit requirement of deciduous fruit crops is also expected to be affected. Although research on crop water use has been undertaken, researchers have not taken the future climate into consideration. They also have focused on increasing temperatures but failed to relate temperature to chill unit accumulation, especially in South Africa. With a view of helping farmers to adapt to climate change, in this study we provide information that will assist farmers in their decision-making process for adaptation and in the selection of appropriate cultivars of deciduous fruits. Crop water use and chill unit requirements are modelled for the present and future climate. Results show that, irrespective of the irrigation system employed, climate change has led to increases in crop water use. Water use with the drip irrigation system was lower than with sprinkler irrigation as a result of efficiency differences in the irrigation technologies. It was also confirmed that the accumulated chill units will decrease in the future as a consequence of climate change. In order to remain in production, farmers need to adapt to climate change stress by putting in place water resources and crop management plans. Thus, producers must be furnished with a variety of adaptation or management strategies to overcome the impact of climate change.

show abstract

“…Chill accumulation was calculated using the Dynamic model (Fishman et al 1987), which has modeled the timing of spring phenological events as well as, or better than, other horticultural models in Mediterranean climates (Luedeling et al 2009a;Alburquerque et al 2008). Accumulation of chill according to the Dynamic model is a two-step process.…”

Section: Chill Accumulationmentioning

confidence: 99%

Nut crop yield records show that budbreak-based chilling requirements may not reflect yield decline chill thresholds

et al. 2014

View full text Add to dashboard Cite

TitleNut crop yield records show that budbreak-based chilling requirements may not reflect yield decline chill thresholds Abstract Warming winters due to climate change may critically affect temperate tree species. Insufficiently cold winters are thought to result in fewer viable flower buds and the subsequent development of fewer fruits or nuts, decreasing the yield of an orchard or fecundity of a species. The best existing approximation for a threshold of sufficient cold accumulation, the "chilling requirement" of a species or variety, has been quantified by manipulating or modeling the conditions that result in dormant bud breaking. However, the physiological processes that affect budbreak are not the same as those that determine yield. This study sought to test whether budbreak-based chilling thresholds can reasonably approximate the thresholds that affect yield, particularly regarding the potential impacts of climate change on temperate tree crop yields. County-wide yield records for almond (Prunus dulcis), pistachio (Pistacia vera), and walnut (Juglans regia) in the Central Valley of California were compared with 50 years of weather records. Bayesian nonparametric function estimation was used to model yield potentials at varying amounts of chill accumulation. In almonds, average yields occurred when chill accumulation was close to the budbreak-based chilling requirement. However, in the other two crops, pistachios and walnuts, the best previous estimate of the budbreak-based chilling requirements was 19-32 % higher than the chilling accumulations associated with average or above average yields. This research indicates that physiological processes beyond requirements for budbreak should be considered when estimating chill accumulation thresholds of yield decline and potential impacts of climate change.

show abstract

The temperature dependence of dormancy breaking in plants: Mathematical analysis of a two-step model involving a cooperative transition

Cited by 353 publications

References 9 publications

Modelling flower production of kiwifruit (Actinidia deliciosa) from winter chilling

Modelling flower production of kiwifruit (Actinidia deliciosa) from winter chilling

simulation study on the effect of climate change on crop water use and chill unit accumulation

Nut crop yield records show that budbreak-based chilling requirements may not reflect yield decline chill thresholds

Contact Info

Product

Resources

About