| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Tomato contains a range of polyphenol, which are regarded as potentially useful compounds with respect to health benefits. However, little is known about cultural practices to produce tomatoes with enhanced levels of polyphenol. Therefore, the aim of this study was to elucidate the effect of cultural practices such as the application of stress (drought, salt stresses) organic fertilizer on polyphenol content. In our studies, polyphenol contents were increased by the application of stress and organic fertilizer, and their effects depend on cultivars and growing seasons. In addition, the stress-enhanced polyphenol content was resulted from the reduction of fruit water, but not net accumulation by up-regulation of biosynthesis. Furthermore, we suggest that salt-induced changes in polyphenol biosynthesis enzymes may not correlate the changes in the polyphenol content. Therefore, our studies conclude that polyphenol contents in tomato fruits enhanced by cultural practices.
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