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題 名 | 供源-積儲與大豆莢果輸導途徑構造之關係 |
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作 者 | 柯錦月; 廖松淵; 陳清義; | 書刊名 | 中華農學會報 |
卷 期 | 169 1995.03[民84.03] |
頁 次 | 頁33-43 |
分類號 | 434.213 |
關鍵詞 | 大豆; 供源-積儲; 莢果; 構造; Soybean; Source/sink; Pod; Anatomy; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究利用摘葉及不同方式摘莢處理,導致供試大豆(Glycine max [L.] Merr.) 莢果發育期及供源與積儲相對狀態均不同。在此狀態下,觀察莢果輸導途徑組織構造,發現個處理株在’莢果發育初期(莢果厚1.5mm),鄰近珠柄及假導管束兩側知薄壁組織,均富含內含物,且細胞壁加厚,除增加其apoplast體積外,可能上扮演類似傳送細胞之功能,負責短距離內物質大量運送。在稍後之莢果發育階段(莢果厚2.4mm),先、後摘莢株假導管束兩側薄壁組織仍富含內含物,且仍呈緊密排列狀,但對照株相同部位之薄壁組織所含內含物減少,細胞間系加大,而此變化趨勢在摘葉株更明顯。結果顯示,假導管束兩側薄壁組織構造特徵之變化,能反映出供源與積儲相對狀態之改變。 位於維管束層與內埤間之管狀通緝組織,在莢果發育初期(莢果厚1.5mm),各處理株之管狀通氣組織仍呈緊密排列狀,稍後發育階段(莢果厚2.4mm),先、後摘莢株之管狀通氣組織為長管狀、不規則排列,但細胞間廣泛接觸;對照株之管狀通氣組織並未呈長管狀,且細胞間隙較大,細胞排列較疏鬆,細胞間接觸面相對減少;摘葉株之管狀通氣組織雖呈長管狀,但細胞之形狀較規則,期apoplast空間相對少於先、後摘莢株。結果顯示,供源與積儲相對狀態改變時,管狀通氣組織形狀及排列方式亦隨之改變,以配合疏導同化物質之需求。 |
英文摘要 | Crop productivity links strongly with the source/sink alterations. In orde to elucidate the effect of source/sink manipulation on the structures of the transport routes of pods in soybeans, partial defoliation and variously partial depodding treatments were used in this study. Anatomy of transport routes of the early stage pods of 1.5mm in thickness showed that the parenchyma cells adjacent to the tracheid bar were rich in ergastic substances and with thick cell walls of both control and treated plants. The thickening in the cell walls of these parenchyma cells not only increases the volume of apoplast but may also play a significant role in short distance transport of assimilates. At later stage pods of 2.4mm in thickness, while the parenchyma cells adjacent to the tracheid bar of pods from the depodding-treated plants were similar to those of the early stage, the parenchyma cells in the pods of control plants were arranged loosely and contained less ergastic substances. This structural variation was even more obvious in the defoliated plants than the control plants. This result indicated the characteristics of the parenchyma cells adjacent to the tracheid bar could reflect the source/sink ratio. At early stage, the tubular aerenchyma cells between the vascular bundle layer and the endothelium were closely arranged in both control and treated plants. At later stage, the tubular aerenchyma cells of the depodding-treated plants were elongated and irregularly arranged resulting in an increase of the cellular interconnections. In the control plants, the tubular aerenchyma cells were shorter than those of the treated plants and loosely arranged resulting in a decrease of the cellular interconnections. In the defoliated plants, the tubular aerenchyma cells were also elongated but regularly arranged resulting in a less apoplast volume than in the depodding-treated plants. These results indicated that the structure and arrangement of the tubular aerenchyma cells were affected by the source/sink manipulation in response to the demands of assimilate transport. |
本系統中英文摘要資訊取自各篇刊載內容。