The effects of jasmonate-mediated resistance of Cabbage on Pieris rapae crucivora
| Autor: | Hui-Hung Liang, 梁輝弘 |
|---|---|
| Rok vydání: | 2006 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 94 Plants would bio-synthesis defense-related signals when infested by herbivores. Through the signal transduction, plants could produce defense chemicals to decrease damage form insect herbivores. Jasmonate is one of the important defense-related signals. In past studies, researchers found that exogenous jasmonate can simulate insect-wounding in plants. The objective of this study is to confirm the performance of defence-related chemicals from cabbage treated with jasmonate on different duration or in different concentrations, and to affect growth performance of its herbivore, Pieris rapae crucivora. The results show that plant defense chemicals change after cabbage treated with jasmonate on different duration. The sinigrin content of 21-day treated plants is highest. Growth performance of Pieris rapae crucivora in 4th instar larvae duration is shortest in 11-day treatment, but the mortality is highest in this treatment. We measured plant defense enzymes in different days after cabbage treated with jasmonate in different concentrations and found polyphenol oxidase activity is lowest when treated with 1.5 mM jasmonate on first day, and is highest after treated with 0 mM on first day. The nitrogen content is highest in treatment with 4.5 mM and the sinigrin content is highest in 4.5 mM treatment. In conclusion, our results revealed that cabbage treated with jasmonate in different duration and in different concentrations will have change the defense- related chemical contents of plant, and these changes may indirectly affect the growth performance of Pieris rapae crucivora. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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