Sugar, Starch, and Proline in Peach Trees Exposed to Freezing Temperatures during DehardeningReport as inadecuate




Sugar, Starch, and Proline in Peach Trees Exposed to Freezing Temperatures during Dehardening - Download this document for free, or read online. Document in PDF available to download.

Freezingtemperatures cause different levels of freezing injury and change biochemicalcomponents of trees. In this study, the range of survival temperature andvariation in electrolyte leakage, and in concentrations of sugar, starch, andproline were determined in peach twigs Jinmi, Changhowonhwangdo, andKawanakajima Hakuto exposed to artificially controlled freezing temperature. Freezingtemperatures at which the plants were damaged by stress were found to be -21°C in Jan. and Feb. -18°C in Mar., and -6°C in Apr. Electrolyte leakage increased astemperature decreased from -15°C to -24°C at each assessment time. Sugar gradually decreased afterthe endodormancy period in the late part of winter, and sugar concentrationwas overall lower in freezing temperature treatments, while starch increased asa result of changing seasons from Jan. to Apr. The trend of prolineconcentration was related to the survival rate of peach trees during winter. Thisstudy suggests possible safe temperatures for survival and cultivation of peachtrees as well as identifying freezing temperature effects on internalcomponents of freeze-injured peach twigs.

KEYWORDS

Carbohydrate, Survival Rate, EC, Peach Cultivar

Cite this paper

Yun, S. , Bae, H. , Chung, K. , Yoon, I. , Nam, E. , Kwon, J. and Jun, J. 2014 Sugar, Starch, and Proline in Peach Trees Exposed to Freezing Temperatures during Dehardening. Agricultural Sciences, 5, 913-921. doi: 10.4236-as.2014.510099.





Author: Seok Kyu Yun, Haejin Bae, Kyung-Ho Chung, Ik Koo Yoon, Eun Young Nam, Jung Hyun Kwon, Ji Hae Jun

Source: http://www.scirp.org/



DOWNLOAD PDF




Related documents