Differences of Morphological Characteristics between Japanese Tomato ‘CF Momotaro York’ and Dutch Tomato ‘Endeavour’ with Single-truss Tomato Plants Grown at High Density

Abstract

In this study, we investigated the differences between the Japanese cultivar‘CF Momotaro York’and the Dutch cultivar‘Endeavour’regarding their morphological characteristics and fruit yield under the low-node order pinching and high-density planting system. Fresh fruit yield was not significantly different between both cultivars. While the Japanese cultivar had lower total dry weight, had higher distribution rate to fruit. The Dutch cultivar had a lower extinction coefficient and higher integrated solar radiation at fruit truss. It also had a higher fruit temperature and respiration rate than the Japanese cultivar. These results indicated that the lack of difference in yield between both cultivars and lower distribution ratio to fruit in the Dutch cultivar might be due to higher consumption of photoassimilate, which led to higher respiration rate and fruit temperature caused by higher extinction coefficient.