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題名 | Influence of Calcium Availability on Deposition of Calcium Carbonate and Calcium Oxalate Crystals in the Idioblasts of Morus Australis Poir. Leaves=鈣對小葉桑葉部異型細胞內碳酸鈣與草酸鈣堆積的影響 |
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作者 | 吳啟智; 陳香君; 顏才博; 黃玲瓏; | 書刊名 | Botanical Studies |
卷期 | 47:2 民95.04 |
頁次 | 頁119-127 |
分類號 | 373.1 |
關鍵詞 | 碳酸鈣; 鈣養分; 草酸鈣; 小葉桑; Calcium carbonate; Calcium nutrition; Calcium oxalate; Morus australis; |
語文 | 英文(English) |
中文摘要 | 小葉桑(Morus australis)葉部之鐘乳體僅形成於位於表皮之石胞中,而草酸鈣晶體則大都位於葉脈鞘細胞之結晶異型細胞中。本研究為探討鈣對小葉桑部異型細胞內此兩種鈣堆積可能的影響,而以不同濃度之鈣營養液供植株生長。結果顯示石胞與碳酸鈣的大小隨著鈣離子濃度的增加而增大,但石胞的密度並未隨著鈣離子濃度不同而有所差異。此外,草酸鈣結晶分布之平均密度於較高濃度之鈣營養液中(3750μmol Ca/l)最高,而在較低濃度之鈣營養液中(94μmol Ca/l)則未觀察到草酸鈣結晶。於植株移植試驗中,由高鈣營養液移植至低鈣營養液24天後,在移植前已達成熟階段的葉片內,其石胞的大小並沒有明顯變化,而其內之鐘乳體之體積稍變小,至草酸鈣晶體的密度顯著的減少而體積亦明顯變小;而由低鈣營養液移植至高鈣營養液的試驗,其石胞的大小亦沒有反應鈣濃度的變化,然而其內之鐘乳體之體積與草酸鈣晶體的密度與體積均明顯變大。 |
英文摘要 | In the leaves of Morus australis, calcium carbonate formed only in lithocysts of epidermal tissue while calcium oxalate crystals were found mostly in crystal idioblasts of bundle sheath. In order to identify a possible influence of calcium nutrition on the formations of these two kinds of calcium depositions, plants were grown with varying calcium supply. The results showed that the sizes of both lithocysts and calcium carbonate increased as the calcium concentration increased, but the distribution density of lithocysts was not affected. In addition, the average distribution density of calcium oxalate crystals was higher in the leaves grown in high calcium solution (3750μmol Ca/l), and no calcium oxalate crystal was found in the leaves grown in low calcium solution (94μmol Ca/l). Twenty-four days after plants were transferred from high to low calcium solutions, the size of lithocysts in the previously formed leaves remained the same, and that of calcium carbonate decreased slightly, but the density and size of calcium oxalate crystals decreased significantly. After transfer from low to high calcium, the size of existing lithocysts did not respond to the change of calcium concentration while the size of calcium carbonate and both the distribution density and size of calcium oxalate crystals changed. |
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