Bud dormancy in apple trees after thermal fluctuations
The objective of this work was to evaluate the effect of heat waves on the evolution of bud dormancy, in apple trees with contrasting chilling requirements. Twigs of 'Castel Gala' and 'Royal Gala' were collected in orchards in Papanduva, state of Santa Catarina, Brazil, and were...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Embrapa Informação Tecnológica
2014-06-01
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| Series: | Pesquisa Agropecuária Brasileira |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000600457&lng=en&tlng=en |
| _version_ | 1818132289116176384 |
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| author | Rafael Anzanello Flávio Bello Fialho Henrique Pessoa dos Santos Homero Bergamaschi Gilmar Arduino Bettio Marodin |
| author_facet | Rafael Anzanello Flávio Bello Fialho Henrique Pessoa dos Santos Homero Bergamaschi Gilmar Arduino Bettio Marodin |
| author_sort | Rafael Anzanello |
| collection | DOAJ |
| description | The objective of this work was to evaluate the effect of heat waves on the evolution of bud dormancy, in apple trees with contrasting chilling requirements. Twigs of 'Castel Gala' and 'Royal Gala' were collected in orchards in Papanduva, state of Santa Catarina, Brazil, and were exposed to constant (3°C) or alternating (3 and 15°C for 12/12 hours) temperature, combined with zero, one or two days a week at 25°C. Two additional treatments were evaluated: constant temperature (3°C), with a heat wave of seven days at 25°C, in the beginning or in the middle of the experimental period. Periodically, part of the twigs was transferred to 25°C for daily budburst evaluation of apical and lateral buds. Endodormancy (dormancy induced by cold) was overcome with less than 330 chilling hours (CH) of constant cold in 'Castel Gala' and less than 618 CH in 'Royal Gala'. A daily 15°C-temperature cycle did not affect the endodormancy process. Heat waves during endodormancy resulted in an increased CH to achieve bud requirements. The negative effect of high temperature depended on the lasting of this condition. Chilling was partly cancelled during dormancy when the heat wave lasted 36 continuous hours or more. Therefore, budburst prediction models need adjustments, mainly for regions with mild and irregular winters, such as those of Southern Brazil. |
| first_indexed | 2024-12-11T08:34:27Z |
| format | Article |
| id | doaj.art-0a96fce1f9104a79ac44d1feca640e46 |
| institution | Directory Open Access Journal |
| issn | 1678-3921 |
| language | English |
| last_indexed | 2024-12-11T08:34:27Z |
| publishDate | 2014-06-01 |
| publisher | Embrapa Informação Tecnológica |
| record_format | Article |
| series | Pesquisa Agropecuária Brasileira |
| spelling | doaj.art-0a96fce1f9104a79ac44d1feca640e462022-12-22T01:14:22ZengEmbrapa Informação TecnológicaPesquisa Agropecuária Brasileira1678-39212014-06-0149645746410.1590/S0100-204X2014000600007S0100-204X2014000600457Bud dormancy in apple trees after thermal fluctuationsRafael AnzanelloFlávio Bello FialhoHenrique Pessoa dos SantosHomero BergamaschiGilmar Arduino Bettio MarodinThe objective of this work was to evaluate the effect of heat waves on the evolution of bud dormancy, in apple trees with contrasting chilling requirements. Twigs of 'Castel Gala' and 'Royal Gala' were collected in orchards in Papanduva, state of Santa Catarina, Brazil, and were exposed to constant (3°C) or alternating (3 and 15°C for 12/12 hours) temperature, combined with zero, one or two days a week at 25°C. Two additional treatments were evaluated: constant temperature (3°C), with a heat wave of seven days at 25°C, in the beginning or in the middle of the experimental period. Periodically, part of the twigs was transferred to 25°C for daily budburst evaluation of apical and lateral buds. Endodormancy (dormancy induced by cold) was overcome with less than 330 chilling hours (CH) of constant cold in 'Castel Gala' and less than 618 CH in 'Royal Gala'. A daily 15°C-temperature cycle did not affect the endodormancy process. Heat waves during endodormancy resulted in an increased CH to achieve bud requirements. The negative effect of high temperature depended on the lasting of this condition. Chilling was partly cancelled during dormancy when the heat wave lasted 36 continuous hours or more. Therefore, budburst prediction models need adjustments, mainly for regions with mild and irregular winters, such as those of Southern Brazil.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000600457&lng=en&tlng=enMalus domesticabrotaçãohoras de friomudanças climáticasmodelos de dormênciaendodormência |
| spellingShingle | Rafael Anzanello Flávio Bello Fialho Henrique Pessoa dos Santos Homero Bergamaschi Gilmar Arduino Bettio Marodin Bud dormancy in apple trees after thermal fluctuations Pesquisa Agropecuária Brasileira Malus domestica brotação horas de frio mudanças climáticas modelos de dormência endodormência |
| title | Bud dormancy in apple trees after thermal fluctuations |
| title_full | Bud dormancy in apple trees after thermal fluctuations |
| title_fullStr | Bud dormancy in apple trees after thermal fluctuations |
| title_full_unstemmed | Bud dormancy in apple trees after thermal fluctuations |
| title_short | Bud dormancy in apple trees after thermal fluctuations |
| title_sort | bud dormancy in apple trees after thermal fluctuations |
| topic | Malus domestica brotação horas de frio mudanças climáticas modelos de dormência endodormência |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000600457&lng=en&tlng=en |
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