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題 名 | The Fluctuation of Carbohydrates and Nitrogen Compounds in Flooded Wax-apple Trees=蓮霧在淹水逆境下葉片及根部碳水化合物及含氮化合物含量之變化 |
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作 者 | 許玉妹; 曾夢蛟; 林金和; | 書刊名 | Botanical Bulletin of Academia Sinica |
卷 期 | 40:3 1999.07[民88.07] |
頁 次 | 頁193-198 |
分類號 | 435.39 |
關鍵詞 | 碳/氧比; 游離胺基酸; 麩醯胺合成酵素; 硝酸鹽還原酵素; 氮; 可溶性蛋白; 可溶性糖; 澱粉; 蓮霧; Carbon/nitrogen ratio; Free amino acid; Glutamine synthetase; Nitrate reductase; Nitrogen; Soluble protein; Soluble sugar; Starch; Syzygium samarangense; |
語 文 | 英文(English) |
中文摘要 | 本試驗以盆栽蓮霧 (Syzygium samarangense Merr. et perry) 為材料,探討淹水對葉片及根部的碳素 與氮素代謝之影響。試驗結果顯示,葉片澱粉含量在淹水14天後顯著升高 ,全氮含量則在淹水處理後35天明顯降低;故在淹水14天後 , 淹水處理組之葉片碳 / 氮比顯著高於對照組。而根部還原糖含量 與澱粉含量 , 在處理間則無顯著差異 , 但可溶性糖在淹水 14 夫後顯著上升。由以上結果推測 , 蓮霧葉 片澱粉的累積 , 及根部可溶性糖含量的上升 , 是由於淹水逆境下根部生長及代謝能力降低 , 對碳水化 合物需求減少所致。葉片合氮化合物的變化方面 , 可溶性蛋白質含量經淹水 7 天顯著下降 , 但淹水 14 、 28 及 42 天處理者與對照組間則無顯著差異。淹水 14 天後 , 葉片游離胺基酸含量則均顯著高於對 照組。而葉片委主瞌胺合成酵素活性經淹水 7 天顯著下降 , 但淹水 14 、 28 及 42 天處理者顯著高於對 照組。根部方面 , 可溶性蛋白質、游離胺基酸及氯態氮含量 , 經淹水處理後均顯著下降 , 顯示淹水會 抑制蓮霧根部氮素之代謝 |
英文摘要 | The present study associates the response to flooding of potted wax-apple trees, Syzygium samarangense Merr. et Perry, with changes in carbon and nitrogen metabolism. In wax-apple leaves, the starch content conspicuously increased after 14 days of flooding, and the total nitrogen content decreased after 35 days of flooding. In roots, concentrations of total soluble sugars significantly increased after 14 days of flooding. The accumulation of starch in flooded wax-apple leaves and increased soluble sugar content in roots apparently were the result of the reduction of growth and metabolic activities in roots after flooding, which reduced the sink demand of carbohydrates. Soluble protein concentration significantly decreased after 7 days of flooding, but remained similar among 14-, 28- and 42-day flooding treatments. Free amino acid content of flooded plants was significantly higher than that of the control at all sampling dates. The activity of glutamine synthetase in leaves significantly decreased after 7 days of flooding, but was higher than the control's at 14, 28 and 42 days of flooding. In wax-apple roots, content of soluble protein, free amino acids, ammonia and the activity of nitrate reductase and glutamine synthetase all decreased significantly after flooding. Apparently, nitrogen metabolism was restricted in the roots during flooded conditions. |
本系統中英文摘要資訊取自各篇刊載內容。