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研究生:劉依昌
研究生(外文):Lu, Ei Chung
論文名稱:乾、濕逆境對甘藷葉片蛋白質、過氧化�@及一些塊根性狀影響之研究
論文名稱(外文):Effects of drought and flooding stresses on leaf protein peroxidase and some storage roots characters of sweet potatoes (~U2;Ipomoea~U1; ~U2;batatas~u1; (L.) Lam.)
指導教授:羅筱鳳
指導教授(外文):Lo, Haiso Feng
學位類別:碩士
校院名稱:文化大學
系所名稱:生物科技研究所
學門:生命科學學門
學類:生物科技學類
論文種類:學術論文
論文出版年:1994
畢業學年度:83
語文別:中文
論文頁數:86
中文關鍵詞:甘藷乾濕逆境葉片蛋白質過氧化塊根
外文關鍵詞:Sweet potatoDroughtFloodingProteinPeroxidaseStorage root
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過氧化一般認為其牽涉不少的生理反應,包括木質素的生合成, IAA生
合成、有機過氧化物之去毒作用,且與根和枝節的分生、葉的形成、老化
及節間的伸長有密切關連。本試驗利用七甘藷品種在生長中後期進行乾濕
逆境處理,調查葉片過氧化之活性和同功異構帶型,及其與一些塊根
性間之相關。過氧化譜分析發現在陽向條帶有15條以上,七個品種間
的差異集中在a13、a14及a15這一區域,。陰向條帶雖大多集成一長條,
但仍可分出c1、c2及c3,品種間變異則以濃淡為主。進行乾濕處理時,在
a7 -a12條帶變的很淡,有若干品種幾近於無,而a14變的較濃,a13及a15
較淡,陰向條帶則普遍有擴散模糊的現象。利用 SAS統計系統分析發現乾
旱處理使葉片蛋白質含量下降,過氧化活性增加,淹水處理也有相似的
效應,但不若乾旱處理明顯,而在中期乾濕處理、生長後期回復正常供水
時,則發現它們有恢復正常生長的趨勢,但中期乾旱處理的恢復能力較中
期淹水為差。農藝性狀調查發現在地上部、纖維根及塊根鮮重上,後期乾
旱處理表現最差;塊根乾物量受乾濕處理、糖含量受淹水處理、澱粉含量
受乾旱處理之影響而降低;而葉片過氧化各區譜帶型亦分別與地上部
、纖維根及塊根鮮重、塊根乾物量、蛋白質及澱粉含量有顯著相關,或可
作為甘藷育種時早期選拔之指標,縮短育種所需之時間。

Peroxidase is believed to play an important role in lignin
synthesis, IAA oxidation, detoxification of H2O2 and is also
known to have close relationship with shoot and root
initiation, leaf formation, senescence ,internode elongation,
and pathoqenetic infection etc. In this experiment, five
treatments including control, middle or late stage flooding,
and middle or late stage drought were performed on 7 sweet
potato cultivars. The effects of flooding and drought stresses
on leaf peroxidase zymograms and activity and the relationship
of zymogram agronomic traits were investigated. Peroxidase
zymogram variations were noted among 7 varieties. At least 15
anodal bands and 3 cathodal bands were observed. Varietal
differences were most pronounced at the A4 zone (A13-A15
bands). Variation in band intensity was also observed at
cationic bands. Drought and flooding treatments affected on
band intensity especially in A12-A7 bands. SAS analysis
indicated treatments and genetic background had significant
effects on peroxidase activity and protein content. In general,
drought tended to decrease protein contents while increase
peroxidase activity. Flooding had similar effects but was not
as distinct as drought. When flooding at the middle stage of
growth period, plants had the ability to recover growth.
However, drought treatment performed much worse than flooding.
Investigations on agronomic characters revealed drought
treatment at the late stage of growth period had the worst
effects on fresh weight of tops, fibrous roots and storage
roots. Of the storage root, dry matter content was lowered by
both treatments, sugar content by flooding and stard by
drought. Leaf peroxidase zymogram also has significant
relationship with fresh weights of tops, fibrous roots, and
storage roots, dry matter, protein and starch contents of
storage root. Leaf peroxidase zymogram has the potential to be
an early selection indicator of sweet potato breeding.

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