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| 2. |  | AZENHA, A.C.; MACEDO, C.L.L.; FERREIRA, C.P.; RUSSI, L.E.de; DINNOUTI, L.A.; CIOMEI, L.O.; RIBEIRO, M.; MARICONDI, P.F.; ARAUJO, R.M.de. Manual de armazenamento de produtos fitossanitarios. Sao Paulo: ANDEF, 1997. 24p. il.| Biblioteca(s): Epagri-Sede. |
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Registro Completo
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
13/04/2011 |
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Data da última atualização: |
13/04/2011 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
-- - -- |
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Autoria: |
LEITE, G. B.; BONHOMME, M.; PUTTI, G. L.; PETTEL, G.; PETRI, J. L.; RAGEAU, R. |
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Afiliação: |
Epagri |
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Título: |
Physiological and Biochemical Evolution of Peach Leaf Buds During Dormancy Course Under Two Contrasted Temperature Patterns. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
International Journal of Horticultural Science, Budapest, v. 12, n. 4, p. 15-19, 2006. |
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Idioma: |
Português |
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Notas: |
ISSN, 1585-0404 |
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Conteúdo: |
Budbreak anomalies in temperate fruit trees grown under mild conditions have often been described. However, only few authors approached the physiological evolution of leaf buds all along the dormancy period according to the temperature pattern. The aim of this study
was to characterize the evolution of peach leaf bud dormancy through some physiological and biochemical parameters under temperate winter conditions and under total cold deprivation after the endodormancy onset. Two treatments were applied in peach trees cv. Redhaven: (i) Regular Chilling Amounts ? RCA and (ii) Total Chilling Deprivation ? TCD. Buds were sampled periodically from different parts of the stem (terminal, medium and basal ones). We recorded the evolution of: carbohydrate concentrations (glucose, fructose, sucrose, sorbitol and starch), respiration rate, water contents and energy metabolism (ATP and ADP ratio). The dynamics of these parameters were compared and
correlated with dormancy evolution (?one node cuttings? test) and budbreak patterns in planta. The endodormancy intensity of terminal buds was significantly lower than those of median and basal buds in early October. Under RCA treatment, this gradient faded and the bud endodormancy release was completed at the same time in all positions along the stem. Thereafter, the ?cuttings? test indicated that terminal buds grew slightly faster than median and basal buds, and, consistently, budbreak in planta started with the terminals buds, followed by the medians and then by the basal ones. The carbohydrate contents showed a transitory change only when the buds began to grow after the
endodormancy was released under RCA. Respiration, water content and ATP/ADP changed dynamics only under RCA and only after the end of the endodormancy (their respective changes were very parallel). The dynamics of none of the tested parameters could be related with the endodormancy dynamics, but respiration, water content and ATP/ADP could be consistent markers of the actual bud growth before bud break
(in this respect, ATP/ADP could not show differences between the terminal and axillary buds while respiration and water content could). MenosBudbreak anomalies in temperate fruit trees grown under mild conditions have often been described. However, only few authors approached the physiological evolution of leaf buds all along the dormancy period according to the temperature pattern. The aim of this study
was to characterize the evolution of peach leaf bud dormancy through some physiological and biochemical parameters under temperate winter conditions and under total cold deprivation after the endodormancy onset. Two treatments were applied in peach trees cv. Redhaven: (i) Regular Chilling Amounts ? RCA and (ii) Total Chilling Deprivation ? TCD. Buds were sampled periodically from different parts of the stem (terminal, medium and basal ones). We recorded the evolution of: carbohydrate concentrations (glucose, fructose, sucrose, sorbitol and starch), respiration rate, water contents and energy metabolism (ATP and ADP ratio). The dynamics of these parameters were compared and
correlated with dormancy evolution (?one node cuttings? test) and budbreak patterns in planta. The endodormancy intensity of terminal buds was significantly lower than those of median and basal buds in early October. Under RCA treatment, this gradient faded and the bud endodormancy release was completed at the same time in all positions along the stem. Thereafter, the ?cuttings? test indicated that terminal buds grew slightly faster than median and basal buds, and, consistently, budbreak in planta started with the terminals buds, followed by th... Mostrar Tudo |
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Palavras-Chave: |
Budbreak anomalies; Carbohydrate concentration; Endodormancy; Respiration intensity; Water contents. |
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Categoria do assunto: |
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Marc: |
LEADER 02956naa a2200253 a 4500
001 1057926
005 2011-04-13
008 2006 bl uuuu u00u1 u #d
100 1 $aLEITE, G. B.
245 $aPhysiological and Biochemical Evolution of Peach Leaf Buds During Dormancy Course Under Two Contrasted Temperature Patterns.
260 $c2006
500 $aISSN, 1585-0404
520 $aBudbreak anomalies in temperate fruit trees grown under mild conditions have often been described. However, only few authors approached the physiological evolution of leaf buds all along the dormancy period according to the temperature pattern. The aim of this study was to characterize the evolution of peach leaf bud dormancy through some physiological and biochemical parameters under temperate winter conditions and under total cold deprivation after the endodormancy onset. Two treatments were applied in peach trees cv. Redhaven: (i) Regular Chilling Amounts ? RCA and (ii) Total Chilling Deprivation ? TCD. Buds were sampled periodically from different parts of the stem (terminal, medium and basal ones). We recorded the evolution of: carbohydrate concentrations (glucose, fructose, sucrose, sorbitol and starch), respiration rate, water contents and energy metabolism (ATP and ADP ratio). The dynamics of these parameters were compared and correlated with dormancy evolution (?one node cuttings? test) and budbreak patterns in planta. The endodormancy intensity of terminal buds was significantly lower than those of median and basal buds in early October. Under RCA treatment, this gradient faded and the bud endodormancy release was completed at the same time in all positions along the stem. Thereafter, the ?cuttings? test indicated that terminal buds grew slightly faster than median and basal buds, and, consistently, budbreak in planta started with the terminals buds, followed by the medians and then by the basal ones. The carbohydrate contents showed a transitory change only when the buds began to grow after the endodormancy was released under RCA. Respiration, water content and ATP/ADP changed dynamics only under RCA and only after the end of the endodormancy (their respective changes were very parallel). The dynamics of none of the tested parameters could be related with the endodormancy dynamics, but respiration, water content and ATP/ADP could be consistent markers of the actual bud growth before bud break (in this respect, ATP/ADP could not show differences between the terminal and axillary buds while respiration and water content could).
653 $aBudbreak anomalies
653 $aCarbohydrate concentration
653 $aEndodormancy
653 $aRespiration intensity
653 $aWater contents
700 1 $aBONHOMME, M.
700 1 $aPUTTI, G. L.
700 1 $aPETTEL, G.
700 1 $aPETRI, J. L.
700 1 $aRAGEAU, R.
773 $tInternational Journal of Horticultural Science, Budapest$gv. 12, n. 4, p. 15-19, 2006.
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