Physiological and biochemical evolution of peach leaf buds during dormancy course under two contrasted temperature patterns

A tétel rövid nézete
dc.contributor.authorLeite, G. B.
dc.contributor.authorBonhomme, M.
dc.contributor.authorPutti, G. L.
dc.contributor.authorPetel, G.
dc.contributor.authorPetri, J. L.
dc.contributor.authorRageau, R.
dc.date.accessioned2021-06-28T09:59:55Z
dc.date.available2021-06-28T09:59:55Z
dc.date.issued2006-09-26
dc.description.abstractBudbreak 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 plank:. 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).en
dc.formatapplication/pdf
dc.identifier.citationInternational Journal of Horticultural Science, Vol. 12 No. 4 (2006) , 15-19.
dc.identifier.doihttps://doi.org/10.31421/IJHS/12/4/672
dc.identifier.eissn2676-931X
dc.identifier.issn1585-0404
dc.identifier.issue4
dc.identifier.jatitleInt. j. hortic. sci.
dc.identifier.jtitleInternational Journal of Horticultural Science
dc.identifier.urihttps://hdl.handle.net/2437/314409en
dc.identifier.volume12
dc.languageen
dc.relationhttps://ojs.lib.unideb.hu/IJHS/article/view/672
dc.rights.accessOpen Access
dc.rights.ownerInternational Journal of Horticultural Science
dc.subjectendodormancyen
dc.subjectcarbohydrate concentrationen
dc.subjectrespiration intensityen
dc.subjectwater contentsen
dc.subjectbudbreak anomaliesen
dc.titlePhysiological and biochemical evolution of peach leaf buds during dormancy course under two contrasted temperature patternsen
dc.typefolyóiratcikkhu
dc.typearticleen
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