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

A tétel rövid nézete
dc.creatorHonty, K.
dc.creatorSárdi, É.
dc.creatorStefanovits-Bányai, É.
dc.creatorTóth, M.
dc.date2008-02-19
dc.date.accessioned2021-06-28T10:00:31Z
dc.date.available2021-06-28T10:00:31Z
dc.descriptionFrost 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.
dc.formatapplication/pdf
dc.identifierhttps://ojs.lib.unideb.hu/IJHS/article/view/780
dc.identifier10.31421/IJHS/14/1-2./780
dc.identifier.urihttp://hdl.handle.net/2437/314489
dc.languageeng
dc.publisherUniversity of Debrecen
dc.relationhttps://ojs.lib.unideb.hu/IJHS/article/view/780/778
dc.rightsCopyright (c) 2018 International Journal of Horticultural Science
dc.sourceInternational Journal of Horticultural Science; Vol. 14 No. 1-2. (2008); 41-44.
dc.source2676-931X
dc.source1585-0404
dc.source10.31421/IJHS/14/1-2.
dc.subjectpear cultivars
dc.subjectperoxidase
dc.subjectpolyphenol oxidase
dc.subjectcarbohydrates
dc.subjectendodormancy
dc.subjectecodormancy
dc.subjectfrost-stress
dc.titleFrost induced changes in enzyme activities and carbohydrate content in the spurs of some pear cultivars during the dormancy
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
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International Journal of Horticultural Science