水稲胚乳組織の発育生理学的研究 : 第1報 胚乳組織の細胞学的不均一性について
スポンサーリンク
概要
- 論文の詳細を見る
In order to clarify the heterogeneity of endosperm tissue, which is seemed to be mainly caused by 3n, the pattern of cell division and the behavior of endosperm nuclei accompanying with early development of rice endosperm tissue were investigated. Mitosis was generally observed in the endosperm, but particularly it was not succeeded by cytogenesis in free nuclear stage. The abnormal figures frequently observed in the processes of cell division indicated heteropycnosis of chromonema (plate 7), chromosome clump (plate 8-10), laggard chromosome (plate 11, 12), retard of phragmoplast formation (plate 14, 15), multinucleate cell (plate 21-25), multipolar division (plate 16-19), amitosis (plate 26), and karyogamy or migration of nucleus (plate 20). The frequency of abnormal division for total number of mitotic cells was about 10%. While the frequency of multinucleate cell for total number of observed cells was about 0.3%. The cell size and the variation in diameter increased with development of endosperm tissue. The increment in nuclear size and the variation in diameter showed the same tendency as the cells did. But the nuclei decreased their length in the minor axis and finally indicated ellipsoid shape. The variation in nuclear volume increased with the development of endosperm tissue. This variation markedly increased with 6 days of age after flowering. The frequency of multinucleate cell also increased with the development of endosperm tissue and this increment were remarkable after the inception of starch grains. From these results it was confirmed that the nature of the endosperm tissue in rice plants is heterogenous.
- 1972-12-28
論文 | ランダム
- 研究所報告 『分類語彙表』の特徴と位置付け
- 国立国語研究所編, 『分類語彙表 増補改訂版』, 2004年1月30日発行, 大日本図書刊, B5判, 706ページ, 4,700円+税
- 看護文書の意味解析用辞書の構築におけるICNPと「分類語彙表」の活用可能性
- 肝機能 (妊娠時の生理--その適応と異常) -- (臓器機能の適応)
- mini-Pills法 (経口避妊薬の効果と副作用(シンポジウム))