Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/20916
DC FieldValueLanguage
dc.contributor.advisor廖松淵zh_TW
dc.contributor.advisorLiaw Song-Iuanen_US
dc.contributor.author劉秋麗zh_TW
dc.contributor.authorLiou, Chiou-Lihen_US
dc.date1996zh_TW
dc.date.accessioned2014-06-06T07:14:51Z-
dc.date.available2014-06-06T07:14:51Z-
dc.identifier.urihttp://hdl.handle.net/11455/20916-
dc.description.abstract以四種溫度25,20,15,10度處理番木瓜(Carica papaya L.Tainung No.50植株,結果發現 10 度處理之植株生長明顯減緩,葉片之光合成速率 及呼吸速率均受低溫抑制,上述抑制情形, 以10度處理之番木瓜較為嚴重. 低溫逆境時,葉片中可溶糖及脯胺酸含量明顯增加,二者已知可當作滲透保 護劑.利用高效液相層析法(HPLC)分析主要可溶糖含量,發現果糖,葡萄糖, 蔗糖及麥芽糖等四種糖含量皆增加,其中以蔗糖含量最多,且增加量亦最 多,另外,分析游離胺基酸發現除了脯胺酸外,幾種主要胺基酸天門冬胺酸, 麩胺酸,絲胺酸含量隨處理溫度下降而減少,尤以10度處理時,會隨處理天 數增加而減少. 在低溫逆境下,番木瓜葉片之抗氧化酵素 SOD( superoxide dismutase),APX(ascorbateperoxidase)及GR(glutathione reductase)活性並無增加,在15度處理幾乎無DHAR(dehydro-ascorbate reductase)活性,但MDHAR(monodehydroascorbate reductase)活性增加, 在10度處理時有較高之MDHAR 及 DHAR 活性,顯示番木瓜在低溫逆境時,不 僅光合成作用受抑制,同時也誘導氧化逆境發生.zh_TW
dc.description.abstractThe 45-d-old papaya(Carica papaya L. tainung No.5) plants were grown ingrowth chambers at constant temperature of 25,20,15 and 10 degree for 5 days.When exposed to 15 and 10 degree,plant growth was arrested. Further analysis of photosynthesis and dark respiration rate of papaya leaves indicated thatboth process were inhibited under low temperature of 15 degree and 10 degreewith higher degree of inhibition at 10 degree treatment. Total soluble sugar and proline contents of papaya leaves under 10 degreewere increased. Both sugar and proline have been shown to serve as compatible solutes which have been known involved in the mechanism of stress tolerance.Analysis of constituents of total soluble sugars with HPLC indicated thatcontents of fructose, glucose, sucrose and maltose were all increased under 15degree and 10 degree treatment. Among them, sucrose content was the highest.Nevertheless, analysis of consituents of amino acids, except proline the contentof major amino acids including aspartate, glutamate and serine were decreasedunder 10 degree. The activities of superoxide dismutase, ascorbate peroxidase and glutathionereductase did not increase in response to low temperature. A higher monodehydro-ascorbate reductase activity was observed under 15 degree. An active dehydroas-corebate reductase was not found under 15 degree treatment but could be easy quatified in leaved of 10 degree treatment. The results suggested that expossureof papaya, a tropical origin plant, to low nonfreezing temperature might causeoxidative stress to the plants.en_US
dc.language.isoen_USzh_TW
dc.publisher植物學系zh_TW
dc.subject光合成速率zh_TW
dc.subjectphotosynthetic rateen_US
dc.subject呼吸速率zh_TW
dc.subject抗氧化酵素zh_TW
dc.subject番木瓜zh_TW
dc.subject低溫逆境zh_TW
dc.subjectpapayaen_US
dc.subjectsuperoxide dismutaseen_US
dc.subjectglutathione reductaseen_US
dc.subjectmonodehydroascorbate reductaseen_US
dc.subjectdehydroascorbate reductaseen_US
dc.title低溫處理對番木瓜葉片之生理影響zh_TW
dc.titleEffects of Low Temperature on the Physiological Metabolism of Papaya (Carica papaya L.)Leavesen_US
dc.typeThesis and Dissertationzh_TW
item.openairetypeThesis and Dissertation-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.grantfulltextnone-
item.fulltextno fulltext-
item.cerifentitytypePublications-
item.languageiso639-1en_US-
Appears in Collections:生命科學系所
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