碩士 / 國立臺灣大學 / 園藝暨景觀學系 / 106 / Houttuynia cordata Thunb. is rich in nutrient and functional constituents, and it’s valuable for industrial application. In order to improve the quality and yield of pig thigh, the antioxidant activity in different tissues and leaf position were studied and followed by the effect of light quality, nitrogen concentration and exogenous salicylic acid and methyl jasmonate application on growth and endogenous compounds of pig thigh.
First of all, in the part of different tissues and leaf position, the samples were divided to five parts, upper leaves, middle leaves, lower leaves, stem and root. Results showed that the DPPH scavenging activity and the total phenolic compounds were highest for lower leaves and lowest for root. Chlorogenic acid was highest in leaves. To sum up, lower leaves contained more functional constituents and less for root.
Secondly, in the part of light quality, results showed that there was no significant difference for the plant growth and biomass for all treatments. Blue light increased total phenolic compounds and chlorogenic acid for 30% compared to other treatments. Blue light is suggested to be the light source for indoor cultivation and supplement light for greenhouse to improve functional constituents.
Thirdly, in the part of nitrogen concentration, results showed that there was no effect on plant growth without nitrogen fertilization. The antioxidant indices were higher due to the stress of nutrient deficiency. There was no significant difference for growth and antioxidant indices for treatments of different nitrogen concentration applications because the period of treatment maybe was too short. The antioxidants were highest for 10 and 15 mM treatments which were similar with normal fertilization formula. Furthermore, the antioxidants were decreased for higher nitrogen concentration applications. To sum up, the nitrogen concentration fertilization without adjustment for other elements in formula (6 mM phosphate, 4 mM potassium, trace element added) is suggested to be 10 to 15 mM to improve functional constituents.
The last part of this study is about the effects of exogenous salicylic acid and methyl jasmonate application on growth and endogenous compounds. In the salicylic acid experiment(0、0.25、0.5、1 and 2 mM), there was no significant difference for plant fresh weight, dry weight, SPAD, NDVI, and Fv/Fm value. The development of leaves was retarded for 1 mM and higher concentration. The total phenolic compounds were most for 0.5 mM treatment. There was no significant difference between foliar application and drench. In methyl jasmonate experiment(0、0.25、0.5、1 and 2 mM), there was no significant difference for application concentration and method in plant growth indece. The total phenolic compounds were most for 2.0 mM treatment with drench. The results suggest that the optimum exogenous application of salicylic acid is 0.5 mM for drench and methyl jasmonate 2.0 mM for drench.
The functional constituents were affected by the different tissues and leaf position.
Moreover, the growth and the functional constituents of pig thigh were also affected by light quality, nitrogen concentration and exogenous salicylic acid and methyl jasmonate application. This study established the optimum cultivation conditions for pig thigh cultivation and elevated the overall benefit of medical industry.
| Identifer | oai:union.ndltd.org:TW/106NTU05378017 |
| Date | January 2018 |
| Creators | Wei-Hsin Lai, 賴暐昕 |
| Contributors | 張育森 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 98 |
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