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頁籤選單縮合
題名 | Components of Vascular Tissue in the Corm of Isoetes Taiwanensis=構成臺灣水韮球莖維管組織之細胞 |
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作者 | 江蔡淑華; 陳淑宇; 陳淑宇; Chiang Tsai, Su-Hwa; Chen, Shu-Yu; Chen, Shu-Yu; |
期刊 | 國立臺灣大學理學院植物學系研究報告 |
出版日期 | 19860600 |
卷期 | 31 1986.06[民75.06] |
頁次 | 頁1-14 |
分類號 | 378.113 |
語文 | eng |
關鍵詞 | 水韮; 球莖; 維管組織; 細胞; 臺灣; Isoetes; |
中文摘要 | 台灣水?球莖內之維管組織、由管胞、篩胞和薄壁細胞三種細胞所組成。由於形成層產生的維管組織排列特殊,韌皮區和木質區交互而排。形成層最初產生者為韌皮區細胞。韌皮區內只具有篩胞,而木質區內則多為薄壁細胞,只有少數管胞滲雜其間。篩域均勻地分布於篩胞之徑線切面和橫切面之細胞壁上,篩胞內常可看到一道(偶有二道)管狀細弦(命名為篩弦)由兩切線縱切面壁貫串細胞腔。 |
英文摘要 | Three cell types, tracheid, sieve cell and parenchyma are recognized in the vascular tissue of the corm of Isoetes Taiwanensis DeVol. The cambium gives rise to several layers of phloem cells, alternating with several layers of xylem cells. The earliest cambial derivatives are phloem cells. Phloem is composed of sieve cells only with sieve areas uniformly distributed on both radial and transverse walls, whereas xylem consists of mainly the parenchyma and small amount of tracheids scattering among parenchyma. One, occasionally two tubular bridges (termed sieve trabeculae) lying radially across the cell lumen of sieve cell are recognized. |
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