Bud dormancy in apple trees after thermal fluctuations

Anzanello, Rafael; Fialho, F. B.; Santos, Henrique Pessoa dos; Bergamaschi, Homero; Marodin, Gilmar Arduíno Bettio

doi:10.1590/s0100-204x2014000600007

Cited by 23 publications

(22 citation statements)

References 22 publications

(24 reference statements)

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“…In the second case (i.e. the period of significant positive correlation for heat accumulation before the warming period, in the middle of the chilling period), controlled environment studies show that when heat is received too early, before critical chilling completion, it may not advance or even delay flowering (Anzanello et al, 2014). In the present study, the low heat accumulation during this period (i.e.…”

Section: Impacts Of Chilling and Heat Accumulation Conditions On Flowmentioning

confidence: 52%

“…Although the effects of temperature on the fulfilment of chilling and heat requirements have been addressed by a large number of studies (e.g. Anzanello et al, 2014;Campoy et al, 2013;Carew et al, 2001;Mahmood et al, 2000), at the mechanistic level, the process responsible for chill accumulation is not fully understood (Campoy et al, 2011a).…”

Section: Introductionmentioning

confidence: 99%

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Delayed chilling appears to counteract flowering advances of apricot in southern UK

Martínez‐Lüscher

Hadley

Ordidge

et al. 2017

Agricultural and Forest Meteorology

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Temperatures are rising across the globe, and the UK is no exception. Spring phenology of perennial fruit crops is to a large extent determined by temperature during effective chilling (endo-dormancy) and heat accumulation (eco-dormancy) periods. We used the apricot flowering records of the UK National Fruit Collections (NFC) to determine the influence of temperature trends over recent decades (1960 to 2014) on apricot (Prunus armeniaca L.) flowering time. Using Partial Least Squares (PLS) regression, we determined the respective periods for calculating chill and heat accumulation. Results suggested intervals between September 27 th and February 26 th and between December 31 st and April 12 th as the effective chilling and warming periods, respectively. Flowering time was correlated with temperature during both periods, with warming during chilling corresponding to flowering delays by 4.82 d°C-1 , while warming during heat accumulation was associated with bloom advances by 9.85 d°C-1. Heat accumulation started after accumulating 62.7 ± 5.6 Chill Portions, and flowering occurred after a further 3744 ± 1538 Growing Degree Hours (above a base temperature of 4°C, with optimal growth at 26°C). When examining the time series, the increase in temperature during the chilling period did not appear to decrease overall chill accumulation during the chilling period but to delay the onset of chill accumulation and the completion of the average chill accumulation necessary to start heat accumulation. The resulting delay in heat responsiveness appeared to weaken the phenology-advancing effect of spring warming. These processes may explain why apricot flowering time remained relatively unchanged despite significant temperature increases. A consequence of this may be a reduction of frost risk for early flowering crops such as apricot in the UK.

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Section: Impacts Of Chilling and Heat Accumulation Conditions On Flowmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Delayed chilling appears to counteract flowering advances of apricot in southern UK

Martínez‐Lüscher

Hadley

Ordidge

et al. 2017

Agricultural and Forest Meteorology

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“…Não apenas a quantidade, mas também a qualidade e a regularidade do frio influenciam o processo de superação da dormência (ANZANELLO et al 2014). Assim, ainda que os anos de 2013 e 2014 tenham apresentado unidades de frio semelhantes (940 e 884 UF, respectivamente), a variação da temperatura observada entre as duas safras, especialmente durante o inverno (Tabela 1) pode ter sido a causa mais provável das diferenças no período de florescimento, bem como na eficiência da quebra de dormência com produtos químicos, que ocorreu de um ano para outro.…”

Section: Resultsunclassified

“…Em condições de insuficiência em frio hibernal, a macieira apresenta anormalidades em relação à brotação, tendo repercussão durante o ciclo vegetativo e acarretando em redução tanto na produtividade quanto na qualidade dos frutos produzidos (HAWERROTH et al 2010a, ANZANELLO et al 2014. No Brasil, a maior parte da cultura da macieira está localizada em áreas onde a exigência em frio das principais cultivares não é plenamente satisfeita (RUFATO et al 2010, PETRI et al 2011.…”

Section: Introductionunclassified

Quebra da dormência de macieiras ‘Daiane’ pelo uso do tidiazurom

Martin

Petri

Fenili

et al. 2017

Rev. Ciên. Agrovet.

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“…Later, in ecodormancy, in a sequential model, plants need a heat accumulation to reach the anthesis. The most common phenological models have been developed for temperate climate conditions, where autumn and winter climates are more regular and should be adjusted to Southern Brazil conditions (ANZANELLO et al, 2014).…”

Section: Influência De Diferentes Níveis Térmicos Sobre a Data Da Plementioning

confidence: 99%

Influence of Different Temperature Levels on the Date of Full Bloom of Peach Varieties in Subtropical Climate

et al. 2016

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-The dormancy dynamics of temperate fruit tree species is complex and highly variable according to genotype and environment. Due to this variability, many phenological models of cold units have not been suitable for subtropical climatic conditions in southern Brazil. The aim of this study was to evaluate the influence of air temperature on the peach dormancy in Urussanga-SC. For this purpose, the correlations between the date of full bloom of sixteen peach varieties and the total hours in which the temperatures remain in certain thermal levels were evaluated. Two groups of varieties with highly differentiated responses to temperature in various times were identified. In the first group, consisting of ten varieties, the beginning of significant influence (p<0.05) of temperatures on the date of full bloom occurred as earlier, in February. In this group, temperatures between 16 and 22 °C accumulated from March to June were those that most contributed to the flowering advance. In the second group, the beginning of the significant influence of temperatures occurred later in April. In this group, the accumulated high temperatures from early April to late May anticipated the full bloom, but from May 25, temperatures below 10 °C were responsible for this advance. This behavior differs from traditional phenological models that consider a sequential cold and heat requirement in the resting phase. The results obtained indicate the possibility of an alternating or parallel influence of different temperature levels on dormancy. Index terms: Prunus persica, dormancy, temperature, statistical method. The phenological data used came from a collection composed of peach tree selections resulting from genetic improvement located in Urussanga, state of Santa Catarina, Brazil (28º 31 'S, and 49º 19' W, 49 m asl). Sixteen selections considered to be adapted to the climate of the region were evaluated. This collection was formed by five plants in sequence of each variety, and for the average phenological records, three central plants were used. The selections, grafted on Okinawa rootstock, were cultivated with spacing of 6 m between rows and 5 m between plants in a Typic Hapludalf of granitic origin. The climate of the region is subtropical humid, with hot summer and no defined dry season (Cfa, according to the Köppen classification). The average annual temperature is 19.4°C, with maximum average temperature of 25.9 ° C and minimum of 14.2°C. The total annual rainfall is 1624.0 mm, and is normally well distributed throughout the year. The hours of cold below 7.2 ° C occur from May to September with an average annual total of 234 hours. INFLUÊNCIA DE DIFERENTES NÍVEIS TÉRMICOS SOBREThe average daily air temperature data (T a ) were collected at the conventional meteorological station of Urussanga-SC, where T a = (T max + T min + T 9 + 2T 2 ) /5, where T max is the maximum daily temperature, T min is the daily minimum temperature, and T 9 and T 2 are temperatures from 9:00 a.m. to 9:00 p.m. respectively. For the calculation of ...

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Bud dormancy in apple trees after thermal fluctuations

Cited by 23 publications

References 22 publications

Delayed chilling appears to counteract flowering advances of apricot in southern UK

Delayed chilling appears to counteract flowering advances of apricot in southern UK

Quebra da dormência de macieiras ‘Daiane’ pelo uso do tidiazurom

Influence of Different Temperature Levels on the Date of Full Bloom of Peach Varieties in Subtropical Climate

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