The genetic and growth period variation of yield, volatile oil and glandular trichomes of mint

• Main Authors: Chih-hao Chiu, 邱志浩
• Other Authors: 胡澤寬
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/50160066585112378821

碩士 === 國立中興大學 === 農藝學系所 === 98 === Twenty-three mint collections were collected in Taiwan to investigate the yields of shoot fresh weight, volatile oil and which’s components and to analyze the variation among collections and annual harvests. The yields of fresh weight and volatile oil between leaf and stem were also compared, and fresh weight ratio of leaf versus stem was estimated. Furthermore, the correlation of volatile oil components, tissue and agronomic traits were estimated. Finally, the yields of fresh weight and volatile oil during growth period were studied. According to ANOVA results, there is significant among collections in new and ratoon cropping and yields of fresh weight, volatile oil and which’s components, and remarked interaction between collections and cropping years is also significant. Generally, the yields of fresh weight, volatile oil and components in ratoon cropping were higher than new cropping. The fresh weight, volatile oil and fresh weight ratio of leaf versus stem among collections were significant. After observed the distribution and amount of leaf epidermal glandular trichomes, 12 collections have capitate and peltate glands at upper and lower epidermal, but the distribution is various. The amount of peltate glands at lower epidermal were more than upper whereas the upper and median leaf were more than lower. The fresh leaf weight positively correlates to leaf and plant volatile oil content, and the volatile oil content of leaf positively correlates to plant volatile oil, menthone, menthol and α-pinene. The fresh weight ratio of leaf versus stem positively correlates to plant volatile oil and menthol content. The amount of peltate glands in different leaf positions positively correlates to volatile oil and menthol content. The menthone content was positive correlation with amount of peltate glands in upper and median leaf, but there were no significant correlation between menthone content and amount of peltate glands in lower leaf. The results elucidate that the collections carried high leaf-stem fresh weight ratio and more leaf peltate glands have high plant volatile oil and menthol content. Compare the fresh weight and volatile oil in different growth period, the yields of collections 16 and 18 increased with days after transplanting （DAT）. Until DAT 146（full bloom stage）, fresh weight, volatile oil and menthol content were highest. Collection 10 was not at reproductive growth in this study and however the fresh weight, volatile oil and menthone content arrived maximum before senescence. Finally, we suggest that the optimal harvest time is between early to late bloom.