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Changes in germination, storage materials and antioxidant enzyme activities in pear (Pyrus betulaefolia Bge. and Pyrus calleryana Dcne.) stock seeds during cold stratification

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Studies were completed to determine germination percentage, the contents of soluble sugar, soluble protein and free amino acid, and the activities of POD and CAT in pear stock seeds during cold stratification at 4°C. Cold stratification completely broke dormancy of mature pear seeds. The optimal chilling times for Pyrus betulaefolia Bge. (P. betulaefolia Bge.) and Pyrus calleryana Dcne. (P. calleryana Dcne.) seeds were about 40 and 50 days, respectively. The soluble sugar and free amino acid contents and peroxidase (POD) and catalase (CAT) activities increased with increasing periods of cold stratification, while soluble protein content decreased at the same time. These changes were correlated positively (soluble sugar, amino acid, POD, CAT) and negatively (soluble protein) with the breaking of dormancy in pear stock seeds after cold stratification.
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Document Type: Research Article

Publication date: October 1, 2011

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  • Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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