摘要
用酶解法解离受精后５ ｄ 和２０ ｄ 的红莲（ Ｎｅｌｕｍｂｏ ｓｐ．） 子叶细胞，应用冷却型科学级电荷偶联装置（ＣＣＤ） 摄像式显微荧光影像系统对单个５ ｄ 细胞和２０ ｄ 细胞的ＤＮＡ、ＲＮＡ和总蛋白相对含量进行了相关测量。实验结果表明：２０ ｄ 细胞ＤＮＡ成为多倍化，为４Ｃ～８Ｃ水平。视窗分析表明：同一４ＣＤＮＡ 视窗中，２０ ｄ 细胞比５ ｄ 细胞的ＲＮＡ和总蛋白含量增加１１ 倍以上。２０ ｄ 细胞的两个ＤＮＡ视窗（４Ｃ和８Ｃ） 中，随着ＤＮＡ倍性的增高，ＲＮＡ 和总蛋白含量也以大致上相应的倍数增高。这些数据表明：红莲子叶贮存蛋白的大量积累既与ＤＮＡ 倍性有关。
Enzyme dissociated cotyledon cells were obtained from red lotus (Nelumbo sp.) on the 5th day and 20th day after fertilization respectively. DNA, RNA and total protein content of individual 5 d and 20 d cell were measured correlatively by microfluorescent imaging system with a cooled scientific_grade Charge coupled deviced (CCD) camera. The results showed that DNA content of the 20 day cell has become polyploidized from 4C to 8C approximately. The window analysis indicated that relative content of RNA and total protein of the 20 day cell was more than 11 times that of the 5 day cell in the same 4C DNA window respectively. The multiple in_creased of RNA and total protein content was about the same as that of DNA in 2 DNA windows (4C and 8C) of the 20 day cell. These data showed that the enormous accumulation of storage proteins in the cotyledon cells of red lotus depends on both DNA ploidy and selective expression of the subunit genes of the storage proteins during the developmental process.
基金
国家自然科学基金
国家自然科学基金重点资助
关键词
红莲
子叶细胞
电荷联装置
显微荧光影像
Cotyledon cell of the lotus, Cooled scientific_grade charge coupled device, Microfluorescent imaging system, Window analysis
