Apricot Bud Chilling and Heat Requirements in Two Different Climatic Areas: Murcia and the Tuscan Maremma

García, Elmer G.; Guerriero, R.; Monteleone, Palmiero

doi:10.17660/actahortic.1999.488.45

Cited by 12 publications

(14 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, highly variable results have been reported in other cultivars as 'Cafona', 'Canino', 'Harcot', 'Orangered', 'Palsteyn', 'Polonais', 'Precoz de Colomber', and 'Tonda di Costiglione', showing heterogeneity among the different approaches (Table 2). Likewise, high differences have been reported when the experiments were carried out in different locations [45,48,49] or years [48,50,51]. Even when the same cultivars ('Canino', 'Orangered' and 'Palsteyn') were evaluated using the same approach in two environments with different climatic conditions, the results obtained showed high differences, with higher values in Spain (806/1172/631 CU) than in South Africa (304/957/274 CU) [45] (Table 2).…”

Section: European and Japanese Apricot (P Armeniaca And P Mume)mentioning

confidence: 99%

“…Even when the same cultivars ('Canino', 'Orangered' and 'Palsteyn') were evaluated using the same approach in two environments with different climatic conditions, the results obtained showed high differences, with higher values in Spain (806/1172/631 CU) than in South Africa (304/957/274 CU) [45] (Table 2). Heat requirements ranged from 485 GDH in 'Goldrich' [49] to values above 6000 GDH in 'Canino' [48], 'Dorada', 'Palsteyn', and 'Rojo Pasión' [45]. Some cultivars showed high differences between seasons, as 'Cafona' (2499-5800 GDH), 'Canino' (2547-6729 GDH), and 'Precoz de Colomber' (2320-5304 GDH) [48].…”

Section: European and Japanese Apricot (P Armeniaca And P Mume)mentioning

confidence: 99%

“…Heat requirements ranged from 485 GDH in 'Goldrich' [49] to values above 6000 GDH in 'Canino' [48], 'Dorada', 'Palsteyn', and 'Rojo Pasión' [45]. Some cultivars showed high differences between seasons, as 'Cafona' (2499-5800 GDH), 'Canino' (2547-6729 GDH), and 'Precoz de Colomber' (2320-5304 GDH) [48].…”

Section: European and Japanese Apricot (P Armeniaca And P Mume)mentioning

confidence: 99%

See 2 more Smart Citations

Chilling and Heat Requirements of Temperate Stone Fruit Trees (Prunus sp.)

et al. 2020

View full text Add to dashboard Cite

Stone fruit trees of genus Prunus, like other temperate woody species, need to accumulate a cultivar-specific amount of chilling during endodormancy, and of heat during ecodormancy to flower properly in spring. Knowing the requirements of a cultivar can be critical in determining if it can be adapted to a particular area. Growers can use this information to anticipate the future performance of their orchards and the adaptation of new cultivars to their region. In this work, the available information on chilling-and heat-requirements of almond, apricot, plum, peach, and sweet cherry cultivars is reviewed. We pay special attention to the method used for the determination of breaking dormancy, the method used to quantify chilling and heat temperatures, and the place where experiments were conducted. The results reveal different gaps in the information available, both in the lack of information of cultivars with unknown requirements and in the methodologies used. The main emerging challenges are the standardization of the conditions of each methodology and the search for biological markers for dormancy. These will help to deal with the growing number of new cultivars and the reduction of winter cold in many areas due to global warming.Agronomy 2020, 10, 409 2 of 32 (2.4 million t in 0.4 million ha), almond (2.2 million t in 1.9 million ha) and sour cherry (1.2 million t in 0.2 million ha) [2].Stone fruit trees, like other temperate woody species, need to accumulate a cultivar-specific amount of chilling during winter to overcome dormancy and then experience warm temperatures to finally flower in spring [3][4][5]. These conditions the adaptation of species and cultivars to each region [6] and it is the main drawback for their extension to warmer latitudes [7]. Knowing the temperature requirements of a cultivar can be useful for growers to anticipate the future performance of their orchards and to design new orchards taking into account the predicted global warming [7][8][9]. In this work, the available information on chilling-and heat-requirements of cultivars of the most cultivated stone fruit crops (almond, apricot, peach, plum and cherry) is reviewed, paying special attention to the approach used for the determination of breaking dormancy, the method used to quantify chilling and heat temperatures, and the place where the experiments were conducted. There is extensive information available about chilling and heat requirements that has purposefully been omitted from this review. We have only included those studies that a) obtained results by using an experimental methodology (i.e., transferring shoots into a growth chamber sequentially during winter) or computational/statistical approaches that relate flowering dates to temperature data over a sufficiently long time series, and b) quantified chilling and heat temperatures using the common models (Chilling Hours model, Utah model or Dynamic model for chilling requirements, Growing Degree Hours for heat requirements). Dormancy: Definition and DescriptionStone fruit tr...

show abstract

Section: European and Japanese Apricot (P Armeniaca And P Mume)mentioning

confidence: 99%

Section: European and Japanese Apricot (P Armeniaca And P Mume)mentioning

confidence: 99%

Section: European and Japanese Apricot (P Armeniaca And P Mume)mentioning

confidence: 99%

See 1 more Smart Citation

Chilling and Heat Requirements of Temperate Stone Fruit Trees (Prunus sp.)

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Apricot cultivars are characterized by a large range of CR: most need 800-1,200 chilling units (CU), and a few cultivars show extreme values of 500 or above 1,400. They can be classified into three main groups: low, medium and high CR (Bailey et al 1982;Garcia et al 1999;Guerriero et al 2002;Ruiz et al 2007). The climatic conditions of the Mediterranean costal areas are not always favourable for an adequate amount of CU.…”

Section: Introductionmentioning

confidence: 99%

The relationship between xylem differentiation and dormancy evolution in apricot flower buds (Prunus armeniaca L.): the influence of environmental conditions in two Mediterranean areas

Andreini

Viti

Bartolini

et al. 2011

Trees

View full text Add to dashboard Cite

Environmental and climatic conditions affect the flower bud growth, flowering and yield performance of fruit species. Temperature and water availability appear to be important factors for temperate fruit trees in mild climates. The aim of this research was to study the involvement of temperature regime on biological processes, such as xylem differentiation and dormancy evolution, in apricot flower buds (Prunus armeniaca L.). Over 3 consecutive years, biological and anatomical investigations were carried out in Tuscany (Italy) and Murcia (Spain) on two cultivars characterized by a different chilling requirement (CR): Currot, a traditional Spanish cultivar with a very low CR, and Stark Early Orange (SEO), a North American cultivar with a very high CR. Currot had a regular bearing, and was characterized by a synchronism between endodormancy release and xylem differentiation. On the other hand, SEO showed an irregular flower bud growth leading to flowering and fruit-set failure, even with a high level of chilling accumulation. No relationship was found in SEO between xylem development and flower bud growth reactivation. The de-synchronism between these processes could determine the poor adaptability to different environmental areas of SEO cultivar, and its very high CR is not the main hypothesised cause of the altered flower bud development.

show abstract

“…Several studies have investigated the CR and HR of different apricot cultivars (Bailey et al, 1973;Garcia et al, 1997;Ruiz et al, 2007;Valentini et al, 2002;Viti et al, 2010). Ten apricot cultivars spanning the range of flowering time in the species showed a range of CR between 34.3 and 69.1 CP (Ruiz et al, 2007).…”

Section: Chilling and Heat Requirements Of Apricotsmentioning

confidence: 99%

Statistical identification of chilling and heat requirements for apricot flower buds in Beijing, China

Guo

Dai

et al. 2015

Scientia Horticulturae

View full text Add to dashboard Cite

a b s t r a c tInstead of the commonly used approach of conducting controlled experiments to estimate chilling and heat requirements (CR and HR) of fruit trees, the statistical method of Partial Least Squares (PLS) regression was applied to identify the CR and HR of apricot (Prunus armeniaca L.) in Beijing, China by correlating first flowering dates of apricot with daily chilling and heat accumulation during 1963-2010. Three common chilling models (the 0-7.2• C, Utah and Dynamic Models) and one forcing model (the Growing Degree Hour Model) were used to convert daily temperature data into daily chill and heat accumulation rates. The results indicated that PLS regression analysis is a useful approach to estimate the CR and HR of fruit trees wherever phenology and climate observations have been conducted for long periods. Use of all chilling models indicated similar chilling periods for apricot in Beijing (mid-September to early March), while the identified forcing period started in early January and extended to the first flowering date for each year. The Dynamic Model appeared to be the most accurate model with smallest year-to-year variation in chill accumulated during the chilling period (coefficient of variation of only 7.5%). Using the Dynamic Model for chill, and the Growing Degree Hour Model for heat quantification, the CR of apricot in Beijing was determined at 75 ± 6 Chill Portions (CP) and the HR at 3055 ± 938 Growing Degree Hours (GDH).

show abstract

Apricot Bud Chilling and Heat Requirements in Two Different Climatic Areas: Murcia and the Tuscan Maremma

Cited by 12 publications

References 0 publications

Chilling and Heat Requirements of Temperate Stone Fruit Trees (Prunus sp.)

Chilling and Heat Requirements of Temperate Stone Fruit Trees (Prunus sp.)

The relationship between xylem differentiation and dormancy evolution in apricot flower buds (Prunus armeniaca L.): the influence of environmental conditions in two Mediterranean areas

Statistical identification of chilling and heat requirements for apricot flower buds in Beijing, China

Contact Info

Product

Resources

About