Title Page
Contents
ABSTRACT 10
Ⅰ. Introduction 12
Ⅱ. Materials and Methods 16
2.1. Plant materials and cultivation management 16
2.2. Plant growth analysis 19
2.3. Plant yield analysis 19
2.4. Fruit quality analysis 19
2.5. Antioxidant analysis 20
2.5.1. Extraction of antioxidant 20
2.5.2. Total antocyanin compound 23
2.5.3. Total flavonoid compound 23
2.5.4. Total polyphenol compound 23
2.5.5. DPPH radical scavenging activity 26
2.5.6. ABTS radical scavenging activity 27
2.6. Chromacity analysis 29
2.7. Statistical analysis 30
Ⅲ. Results and Discussion 31
3.1. Growing conditions 31
3.2. Plant growth characteristics 33
3.3. Plant yield characteristics 35
3.4. Fruit quality characteristics 38
3.5. Antioxidant characteristics 42
3.5.1. Total antocyanin compound 42
3.5.2. Total flavonoid compound 45
3.5.3. Total polyphenol compound 47
3.5.4. DPPH radical scavenging activity 49
3.5.5. ABTS radical scavenging activity 51
3.6. Chromacity characteristics 53
3.7. Correlation analysis 59
3.8. Multivariate analyis 65
Ⅳ. Conclusion 67
References 70
Appendix 78
Abstract (in Korean) 79
Table 1. Fruit picture, parentage and year of breeding of 6 domestic ever-bearing strawberry cultivars. 17
Table 2. Flowering and fruit size characteristics of 6 domestic ever-bearing strawberry cultivars. 18
Table 3. Flowchart for antioxidant analysis of strawberry according to cultivars and harvest time during summer season in highland. 22
Table 4. Calibration curves of TAC (cyanidin-3-O-glucoside equivalent), TFC (naringenin equivalent) and TPC (gallic acid equivalent). 25
Table 5. Calibration curves of DPPH radical scavenging ability (vitamin C equivalent), ABTS radical scavenging ability (vitamin C equivalent). 28
Table 6. Plant growth characteristics according to cultivars and harvest time at strawberry during summer season in highland (n=15). 34
Table 7. Plant yield characteristics according to cultivars and harvest time at strawberry during summer season in highland. 37
Table 8. Fruit quality characteristics according to cultivars and harvest time at strawberry during summer season in highland (n=9). 41
Table 9. Hexadecimal values (HEX), RGB values, and reference colors according to cultivars and maturation (Semi-riped and Full-riped) at strawberry during summer season in highland. 57
Table 10. Chromacity parameters according to cultivars and maturation (Semi-riped and Full-riped) at strawberry during summer season in highland. 58
Fig 1. Average and lowest temperature in the rain shelter house during summer season in highland and average and lowest temperature in Seoul. 32
Fig 2. Fruit quality characteristics according to cultivars at strawberry during summer season in highland (n=9). 40
Fig 3. Changes in fruit appearance according to cultivars and maturation (Semi-riped, Full-riped) at strawberry during summer season in highland. 43
Fig 4. Total antocyanin compound (C3GE, mg·g⁻¹, dw) according to cultivars and harvest time at strawberry during summer season in... 44
Fig 5. Total flavonoid compound (NE, mg·g⁻¹, dw) according to cultivars and harvest time at strawberry during summer season in highland.... 46
Fig 6. Total polyphenol compound (GAE, mg·g⁻¹, dw) according to cultivars and harvest time at strawberry during summer season in... 48
Fig 7. DPPH radical scavenging activity (VCE, mg·g⁻¹, dw) according to cultivars and harvest time at strawberry during summer season in... 50
Fig 8. ABTS radical scavenging activity (VCE, mg·g⁻¹, dw) according to cultivars and harvest time at strawberry during summer season in... 52
Fig 9. Changes in fruit cutting appearance according to cultivars and maturation (Semi-riped and Full-riped) at strawberry during summer season in highland. 55
Fig 10. Fruit powder color according to cultivars and maturation (Semi-riped and Full-riped) at strawberry during summer season in highland. 56
Fig 11. Correlation analysis of environment, growth, yield, fruit quality, and antioxidant activity at strawberry during summer season in highland. 61
Fig 12. Correlation between growth, yield, fruit quality, and antioxidant activity in the July harvest at strawberry during summer season in highland. 62
Fig 13. Correlation between growth, yield, fruit quality, and antioxidant activity in the August harvest at strawberry during summer season in highland. 63
Fig 14. Correlation between growth, yield, fruit quality, and antioxidant activity in the September harvest at strawberry during summer season in highland. 64
Fig 15. Multivariate analysis (Nonmetric multidimensional scaling) of environment, growth, yield, fruit quality, and antioxidant activity at strawberry during summer season in highland.... 66