我们的网站为什么显示成这样?

可能因为您的浏览器不支持样式,您可以更新您的浏览器到最新版本,以获取对此功能的支持,访问下面的网站,获取关于浏览器的信息:

|Table of Contents|

黑杨派无性系胚珠和胚囊发育的比较(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
1984年03期
Page:
44-50
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
A COMPARISON STUDY OF THE DEVELOPMENT OF THE OVULE AND EMBRYO SAC OF CLONES OF AIGEIROS POPLARS
Article ID:
1000-2006(1984)03-0044-07
Author(s):
Fan Ruwen
Department of Forestry
Keywords:
-
Classification number :
-
DOI:
10.3969/j.jssn.1000-2006.1984.03.008
Document Code:
A
Abstract:
The development of the ovule, megaspore and megagametophyte in Populus del-toides Bartr. cv. ’Lux’ (ex.I-69/55), Populus × euramericana (Dode) Guinier. cv. ’San Martino’ (ex. I-72/58) and Populus × euramericana (Dode) Guinier (ex. I-214) of Aigeiros poplars was observed. The ovule is anatropous, unitegmic and crassinu-cellate. Both integuments originate from the epidermis. The archesporium is considered to be unicellular. The primary sporogenous cell functions as the megaspore mother cell which forms a linear tetrad. The chalazal member of the megaspore tetrad is functional and develops into a polygonum-type embryo sac. During the later stages of development the megagametophyte projects through the nucellus into the micropyle. The archesporium is considered to be multicellular, but more than one archesporial cell may develop and thus two linear tetrads of megaspores may be found in few ovules of I-72. In some ovules of I-72, the second megaspore in the charazal region of the tetrad is functional.

References

-

Last Update: 1900-01-01