Mild temperatures on bud breaking dormancy in peaches

Chavarria, Geraldo; Herter, Flávio Gilberto; Raseira, M. do C. B.; Rodrigues, João Domingos; Reisser, C.; Silva, João Baptista da

doi:10.1590/s0103-84782009000700010

Cited by 22 publications

(16 citation statements)

References 15 publications

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“…Putti et al (2003b), using single node cutting biological test, also observed that the effectiveness of temperature to overcome dormancy varies among apple cultivars, where cultivars with lower chilling requirement have effective temperatures higher than cultivars with higher chilling requirement. The same response was obtained by Chavarria et al (2009), using the grafted twigs methodology in peach trees, where the temperatures of 15ºC during winter promoted satisfactory percentage of budbreak and flowering in low chill cultivars, such as 'Turmalina' cultivar.…”

Section: Resultssupporting

confidence: 65%

“…According to Petri and Leite (2004), trees in mild winter climates have terminal growth stimulated, which inhibits the budbreak in axillary buds. Chavarria et al (2009), Wagner Junior et al (2006 did not reported problems related to budbreak limited in axillary buds with the method using grafted twigs in peach, obtaining budbreak percentage over 50% in the highest chilling exposure tested. The low percentage of budbreak in both apple cultivars in the method using grafted twigs may be associated to the high apical dominance characteristic of apples trees.…”

Section: Resultsmentioning

confidence: 98%

“…Despite the wide use of this method, it presents limited time for evaluation due to low maintenance and longevity of tissues, may mask the potential of budbreak in vegetative and flower buds. The methodology using grafted twigs in autumn, tested by Wagner Junior et al (2006,2009) and Chavarria et al (2009) in peach trees, may be interesting in apple trees because the lower tissue dehydration than detached twigs, allowing extend the period for plant material assessment.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of winter temperatures on apple budbreak using grafted twigs

et al. 2013

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-Temperature is the main climate factor related to induction, maintenance and dormancy release in apple (Malus domestica Borkh.). The inadequate chilling exposure in apples causes budbreak problems, resulting in decrease in yield potential. Thus, the knowledge of physiological principles and environmental factors determining the dormancy phenomenon, especially winter temperature effects, it is necessary for the efficient selection of cultivars in a productive region. In addition, it is indispensable to adapt the orchard management aiming to decrease the problems caused by lack chilling during winter. The objective of this study was to evaluate the influence of different thermal conditions during the dormancy period on budbreak of apple cultivars. One-year-old twigs of 'Castel Gala' and 'Royal Gala' cultivars, grafted on M7 rootstock, were submitted to temperatures of 5, 10 and 15ºC for different exposure periods (168; 336; 672; 1,008 and 1,344 hours). After treatments execution, the plants were kept in a greenhouse at 25ºC. Budbreak was quantified when accumulated 3,444; 6,888; 10,332; 13,776; 17,220 and 20,664 GDHºC after temperature treatments. The cultivars responded differently to temperature effect during the winter period. The temperature of 15°C during winter shows a greater effectiveness on 'Castel Gala' apple budbreak while in the 'Royal Gala' apples the temperatures of 5 and 10ºC show better performance. 'Castel Gala' cultivar (low chilling requirement) may supply its physiological necessities, may be capable to budburst, even when subjected to higher temperatures in relation to 'Royal Gala' apples (high chilling requirement). Index terms: Malus domestica, dormancy, chilling requirement, grafted twigs, apical dominance. AVALIAÇÃO DE TEMPERATURAS HIBERNAIS NA BROTAÇÃO DE GEMAS DE MACIEIRA UTILIZANDO RAMOS ENXERTADOSRESUMO -A temperatura é o principal fator ambiental relacionado à indução, manutenção e superação da dormência da macieira (Malus domestica Borkh.). O inadequado suprimento em frio para esta espécie determina a ocorrência de problemas relacionados à brotação, repercutindo na diminuição do potencial produtivo. Dessa forma, o conhecimento dos princípios fisiológicos e dos fatores ambientais determinantes no fenômeno da dormência, sobretudo o efeito das temperaturas hibernais, faz-se necessário para a eficiente seleção de cultivares em determinada região produtora, assim como para eficiente elaboração e adequação de práticas culturais para minimização de problemas causados pelo insuficiente acúmulo de frio hibernal. O objetivo deste trabalho foi avaliar a influência de diferentes condições térmicas durante o período de dormência na brotação de gemas de cultivares de macieira. Ramos de um ano das cultivares Castel Gala e Royal Gala, enxertadas no porta-enxertos M7, foram submetidas às temperaturas de 5; 10 e 15ºC, durante diferentes períodos de exposição (168; 336; 672; 1.008 e 1.344 horas). Após a efetivação dos tratamentos, as plantas foram mantidas em casa de vegetação a 25ºC. A brot...

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Section: Resultssupporting

confidence: 65%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Evaluation of winter temperatures on apple budbreak using grafted twigs

et al. 2013

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“…In this figure Hawerroth et al (2013) found that this temperature is the most efficient in an early variety of apple trees under controlled temperature conditions (5, 10 and 15 o C). Under subtropical climate conditions, some peach cultivars break their dormancy very easily, and this may be due to superficial dormancy or lack of endodormancy (CHAVARRIA et al, 2009;HRUY et al, 2013;SCARIOTTO et al, 2013). Observing the behavior of group 2 varieties, an opposite result in relation to many models used worldwide was observed, which consider a sequential influence of temperatures on dormancy.…”

Section: Introductionmentioning

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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“…Para que se inicie novo ciclo vegetativo na primavera em condições naturais, é necessário que as plantas sejam expostas a um período em que as temperaturas sejam inferiores a 7,2 °C durante o inverno e este período é variável em função da espécie (Putti et al, 2003). No entanto, Chavarria et al (2009) demonstraram que temperaturas abaixo de 12 ºC são efetivas na superação da endodormência em cultivares de pessegueiro de baixa necessidade de frio.…”

Section: Introductionunclassified