https://scholars.lib.ntu.edu.tw/handle/123456789/140977
標題: | Formation of Calcium Carbonate Deposition in the Cotyledons during he Germination of Justicia procumbens L. (Acanthaceae) Seeds 爵床(爵床科)種子發芽過程子葉內碳酸鈣沉積物的形成 |
作者: | 黃玲瓏 林妙玲 顏才博 Huang, Ling-Long Lin, Miao-Ling Yen, Tsair-Bor |
關鍵字: | Calcium carbonate deposition;Lithocyst;Cystolith;Cotyledon;Seed germination;EDX;Justicia procumbens | 公開日期: | 2004 | 出版社: | 臺北市:國立台灣大學生態學與演化生物學研究所 | 卷: | 49 | 期: | 4 | 起(迄)頁: | 250-262 | 來源出版物: | Taiwania | 摘要: | During seed germination of Justicia procumbens, the formation of lithocysts, trichomes and diacytic stomata in the epidermis of cotyledons was following a specific distribution pattern. During the first 1-3 days, many young stomata and trichome initial cells were formed sporadically in the adaxial and abaxial epidermis, but no lithocyst was found. Three to five days after seed sawing, two cotyledons were exposed to light and then opened. In the meantime, some lithocysts were recognized on both adaxial and abaxial epidermises. The lithocysts on the adaxial epidermis occurred in the radially arranged cells located between the central area and the margin. However on the abaxial epidermis, they were found only in the marginal cell layer and their axes were along the margin of cotyledons. The total number of lithocysts in a cotyledon at this stage was 32.2 ± 4.3 and the cystolith inside the lithocyst was spindle in shape and 48.2 ± 21.1 µm in length. Three weeks after seed sowing, the cotyledons were mature and the total number of lithocysts in a cotyledon was 112.2 ± 10.1 and the cystolith in the lithocyst was enlarged to be 119.8 ± 27.8 µm in length. The cystolith was extracellularly formed in the cell wall of lithocyst. Its surface was with many protuberances and surrounded by a cystolith sheath connecting to cytoplasmic strands. The core of cystolith was surrounded by concentrically stratified fibrils and the calcium carbonate was concentrically accumulated. The waved stratified fibrils were also deposited in the protuberances. The EDX spectra showed that the main mineral elemental compositions of cystoliths were Ca and P. Ca was deposited more in the central part of cystolith than in the marginal area. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/2006121215550982 | 其他識別: | 246246/2006121215550982 | DOI: | 10.6165/tai.2004.49(4).250 |
顯示於: | 生態學與演化生物學研究所 |
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