Frost induced changes in enzyme activities and carbohydrate content in the spurs of some pear cultivars during the dormancy

A tétel rövid nézete
dc.contributor.authorHonty, K.
dc.contributor.authorSárdi, É.
dc.contributor.authorStefanovits-Bányai, É.
dc.contributor.authorTóth, M.
dc.date.accessioned2021-06-28T10:00:31Z
dc.date.available2021-06-28T10:00:31Z
dc.date.issued2008-02-19
dc.description.abstractFrost tolerance of pear cultivars was checked after artificial cold treatment in 2003-2005. Limbs collected during the endodormancy were exposed in a climatic chamber for 24 hours to —25; —28 °C, while those collected in the ecodormancy were kept at —15 and —18 °C. Frost damages of buds were registered according to a visually defined scale, then peroxidase (POD), polyphenol oxidase (PPO) enzyme activities and carbohydrate contents were checked in buds and spur-part below the buds. POD activity of untreated control in tissue below buds was higher than in the buds, which were increasing continuously during the endodormancy and decreased at the end of the ecodormancy. During endodormancy, cold treatment of —25 and —28 °C effected different changes of enzyme activity in buds of the cultivars. In the ecodormancy, enzyme activities increased after a cold treatment of —15 °C, whereas the activities decreased significantly after —18 °C. `Kaiser' — susceptible to frost — with its higher values of both enzyme activities marked out from other cultivars, which is correlated with its stress response. Changes in carbohydrate components — especially in glucose — of buds monitored well the different stress responses of tolerant and resistant pear cultivars induced by frost stress.en
dc.formatapplication/pdf
dc.identifier.citationInternational Journal of Horticultural Science, Vol. 14 No. 1-2. (2008) , 41-44.
dc.identifier.doihttps://doi.org/10.31421/IJHS/14/1-2./780
dc.identifier.eissn2676-931X
dc.identifier.issn1585-0404
dc.identifier.issue1-2.
dc.identifier.jatitleInt. j. hortic. sci.
dc.identifier.jtitleInternational Journal of Horticultural Science
dc.identifier.urihttps://hdl.handle.net/2437/314489en
dc.identifier.volume14
dc.languageen
dc.relationhttps://ojs.lib.unideb.hu/IJHS/article/view/780
dc.rights.accessOpen Access
dc.rights.ownerInternational Journal of Horticultural Science
dc.subjectpear cultivarsen
dc.subjectperoxidaseen
dc.subjectpolyphenol oxidaseen
dc.subjectcarbohydratesen
dc.subjectendodormancyen
dc.subjectecodormancyen
dc.subjectfrost-stressen
dc.titleFrost induced changes in enzyme activities and carbohydrate content in the spurs of some pear cultivars during the dormancyen
dc.typefolyóiratcikkhu
dc.typearticleen
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