Chilling requirements and dormancy evolution in grapevine buds.
Fluctuations in winter chilling availability impact bud dormancy and budburst. The objective of this work was to determine chilling requirements to induce and overcome endodormancy (dormancy controlled by chilling) of buds in different grape cultivars. "Chardonnay", "Merlot" and "Cabernet Sauvignon" shoots were collected in Veranópolis-RS vineyards in 2010, and submitted to a constant 3 °C temperature or daily cycles of 3/15 °C for 12/12h or 18/6h, until reaching 1120 chilling hours (CH, sum of hours with temperature ≤ 7.2 °C). Periodically, part of the samples in each treatment was transferred to 25 °C for budburst evaluation (green tip). Chilling requirements to induce and overcome endodormancy vary among cultivars, reaching a total of 136 CH for "Chardonnay", 298 CH for "Merlot" and 392 CH for "Cabernet Sauvignon". Of these, approximately 39, 53 and 91 CH are required for induction of endodormancy in the three cultivars, respectively. The thermal regimes tested (constant or alternating) do not influence the response pattern of each cultivar to cold, with 15 °C being inert in the CH accumulation process. In addition, time required to start budburst reduces with the increase in CH, at a rate of one day per 62 CH, without significant impacts on budburst uniformity. Index terms: Chilling hours; endodormancy; budburst; Vitis vinifera .
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Format: | Artigo de periódico biblioteca |
Language: | English eng |
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2018-10-26
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Subjects: | Chilling hours, Endodormancy, Budburst, Horas de frio, Endodormência, Vitis Vinifera, Brotacao, |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1098301 http://dx.doi.org/10.1590/1413-70542018424014618 |
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dig-alice-doc-10983012018-10-27T01:16:41Z Chilling requirements and dormancy evolution in grapevine buds. ANZANELLO, R. FIALHO, F. B. SANTOS, H. P. dos Rafael Anzanello, secretaria da Agricultura, Pecuária e Irrigação, Departamento de Diagnóstico e Pesquisa Agropecuária, Veranópolis, RS, Brasil; FLAVIO BELLO FIALHO, CNPUV; HENRIQUE PESSOA DOS SANTOS, CNPUV. Chilling hours Endodormancy Budburst Horas de frio Endodormência Vitis Vinifera Brotacao Fluctuations in winter chilling availability impact bud dormancy and budburst. The objective of this work was to determine chilling requirements to induce and overcome endodormancy (dormancy controlled by chilling) of buds in different grape cultivars. "Chardonnay", "Merlot" and "Cabernet Sauvignon" shoots were collected in Veranópolis-RS vineyards in 2010, and submitted to a constant 3 °C temperature or daily cycles of 3/15 °C for 12/12h or 18/6h, until reaching 1120 chilling hours (CH, sum of hours with temperature ≤ 7.2 °C). Periodically, part of the samples in each treatment was transferred to 25 °C for budburst evaluation (green tip). Chilling requirements to induce and overcome endodormancy vary among cultivars, reaching a total of 136 CH for "Chardonnay", 298 CH for "Merlot" and 392 CH for "Cabernet Sauvignon". Of these, approximately 39, 53 and 91 CH are required for induction of endodormancy in the three cultivars, respectively. The thermal regimes tested (constant or alternating) do not influence the response pattern of each cultivar to cold, with 15 °C being inert in the CH accumulation process. In addition, time required to start budburst reduces with the increase in CH, at a rate of one day per 62 CH, without significant impacts on budburst uniformity. Index terms: Chilling hours; endodormancy; budburst; Vitis vinifera . 2018-10-27T01:16:36Z 2018-10-27T01:16:36Z 2018-10-26 2018 2019-04-27T11:11:11Z Artigo de periódico Ciência e Agrotecnologia, v. 42, n. 4, p. 364-371, Jul./Aug. 2018. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1098301 http://dx.doi.org/10.1590/1413-70542018424014618 en eng openAccess |
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Chilling hours Endodormancy Budburst Horas de frio Endodormência Vitis Vinifera Brotacao Chilling hours Endodormancy Budburst Horas de frio Endodormência Vitis Vinifera Brotacao |
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Chilling hours Endodormancy Budburst Horas de frio Endodormência Vitis Vinifera Brotacao Chilling hours Endodormancy Budburst Horas de frio Endodormência Vitis Vinifera Brotacao ANZANELLO, R. FIALHO, F. B. SANTOS, H. P. dos Chilling requirements and dormancy evolution in grapevine buds. |
description |
Fluctuations in winter chilling availability impact bud dormancy and budburst. The objective of this work was to determine chilling requirements to induce and overcome endodormancy (dormancy controlled by chilling) of buds in different grape cultivars. "Chardonnay", "Merlot" and "Cabernet Sauvignon" shoots were collected in Veranópolis-RS vineyards in 2010, and submitted to a constant 3 °C temperature or daily cycles of 3/15 °C for 12/12h or 18/6h, until reaching 1120 chilling hours (CH, sum of hours with temperature ≤ 7.2 °C). Periodically, part of the samples in each treatment was transferred to 25 °C for budburst evaluation (green tip). Chilling requirements to induce and overcome endodormancy vary among cultivars, reaching a total of 136 CH for "Chardonnay", 298 CH for "Merlot" and 392 CH for "Cabernet Sauvignon". Of these, approximately 39, 53 and 91 CH are required for induction of endodormancy in the three cultivars, respectively. The thermal regimes tested (constant or alternating) do not influence the response pattern of each cultivar to cold, with 15 °C being inert in the CH accumulation process. In addition, time required to start budburst reduces with the increase in CH, at a rate of one day per 62 CH, without significant impacts on budburst uniformity. Index terms: Chilling hours; endodormancy; budburst; Vitis vinifera . |
author2 |
Rafael Anzanello, secretaria da Agricultura, Pecuária e Irrigação, Departamento de Diagnóstico e Pesquisa Agropecuária, Veranópolis, RS, Brasil; FLAVIO BELLO FIALHO, CNPUV; HENRIQUE PESSOA DOS SANTOS, CNPUV. |
author_facet |
Rafael Anzanello, secretaria da Agricultura, Pecuária e Irrigação, Departamento de Diagnóstico e Pesquisa Agropecuária, Veranópolis, RS, Brasil; FLAVIO BELLO FIALHO, CNPUV; HENRIQUE PESSOA DOS SANTOS, CNPUV. ANZANELLO, R. FIALHO, F. B. SANTOS, H. P. dos |
format |
Artigo de periódico |
topic_facet |
Chilling hours Endodormancy Budburst Horas de frio Endodormência Vitis Vinifera Brotacao |
author |
ANZANELLO, R. FIALHO, F. B. SANTOS, H. P. dos |
author_sort |
ANZANELLO, R. |
title |
Chilling requirements and dormancy evolution in grapevine buds. |
title_short |
Chilling requirements and dormancy evolution in grapevine buds. |
title_full |
Chilling requirements and dormancy evolution in grapevine buds. |
title_fullStr |
Chilling requirements and dormancy evolution in grapevine buds. |
title_full_unstemmed |
Chilling requirements and dormancy evolution in grapevine buds. |
title_sort |
chilling requirements and dormancy evolution in grapevine buds. |
publishDate |
2018-10-26 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1098301 http://dx.doi.org/10.1590/1413-70542018424014618 |
work_keys_str_mv |
AT anzanellor chillingrequirementsanddormancyevolutioningrapevinebuds AT fialhofb chillingrequirementsanddormancyevolutioningrapevinebuds AT santoshpdos chillingrequirementsanddormancyevolutioningrapevinebuds |
_version_ |
1756025196623429632 |