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題 名 | Sporogenesis and Gametophyte Development in the Chinese Chestnut (Castanea mollissima Blume.)=板栗大小孢子的發生和雌雄配子體的發育 |
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作 者 | 鄒鋒; 郭素娟; 謝鵬; 呂文君; 熊歡; 李廣會; | 書刊名 | 臺灣林業科學 |
卷 期 | 28:4 2013.12[民102.12] |
頁 次 | 頁171-184 |
分類號 | 373.261 |
關鍵詞 | 板栗; 大孢子發生; 小孢子發生; 雄配子體; 雌配子體; Castanea mollissima; Megasporogenesis; Microsporogenesis; Male gametophyte; Female gametophyte; |
語 文 | 英文(English) |
中文摘要 | 中國板栗是廣泛分布的果樹,其具有生態和經濟價值。為了探討其發育過程中是否存在生殖障礙,利用石蠟切片和掃描電鏡技術對板栗「燕山早豐」的大小孢子發生及雌雄配子體發育過程進行觀察。結果:花藥壁的發育屬於基本型,其由表皮、藥室內壁、中層和絨氈層組成。絨氈層類型為腺質絨氈層。小孢子母細胞減數分裂過程中的胞質分裂方式為同時型,四分體的排列為四面體型,成熟花粉為2-細胞型,胚囊發育屬蓼型。每子房含有16~18個胚珠,胚珠倒生,雙珠被,厚珠心。受精之前,兩個極核融合形成一個次生核。成熟胚囊由7細胞組成。在子房中觀察到不正常的胚囊或敗育的胚珠。敗育的胚珠可能是導致「燕山早豐」結實率低的原因。 |
英文摘要 | Chinese chestnut (Castanea mollissima Blume.) is a widely distributed fruit tree and well known for its ecological and economic value. In order to evaluate obstacles to sexual reproduction in C. mollissima, microsporogenesis, megasporogenesis, and development of the male and female gametophytes of the C. mollissima 'Yanshanzaofeng' cultivar were examined by a paraffin section technique and scanning electron microscopy. Results showed that the anther wall was of the basic type and consisted of an epidermis, endothecium, middle layers, and tapetum. The tapetum was of the glandular type. Cytokinesis during meiosis of the microspore mother cell was of the simultaneous type, tetrads were tetrahedral, pollen grains were the 2-cell type, and development of the embryo sac was of the Polygonum type. In total, 16~18 ovules were found in the ovary axis, and the ovules were anatropous, bitegmic, and crassinucellate. Before fertilization, the 2 polar nuclei fused into a secondary nucleus. The mature embryo sac was made up of 7 cells. Abnormal embryo sacs or abortive ovules were observed in the ovary. The abortive ovules are likely the cause of the low seed set in C. mollissima 'Yanshanzaofeng'. |
本系統中英文摘要資訊取自各篇刊載內容。