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|

杉木×柳杉胚胎发育的研究(PDF)

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

Issue:
1984年01期
Page:
124-130
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
A STUDY OF THE EMBRYOLOGICAL DEVELOPMENT OF CHINESE FIR×CRYPTOMERIA
Article ID:
1000-2006(1984)01-0124-07
Author(s):
Jiang Shu & Ye Jianguo
Department of Forestry
Keywords:
-
Classification number :
-
DOI:
10.3969/j.jssn.1000-2006.1984.01.012
Document Code:
A
Abstract:
The course of sexual reproduction of Chinese fir × Cryptomeria (Cunninghamia lanceolata × Cryptomeria fortunei) is systematically reported in this paper. The observations are summarized as follows.1 . Chinese fir is different from Cryptomeria in development time of the megaspore and the microspore. Cryptomeria flowers earlier than Chinese fir, thus their flowering seasons are different.2 . It has been found that the pollen grains of Chinese fir and Cryptomeria and those of their hybrid (Cunninghamia lanceolata×Cryptomeria fortunei) are different in shape, size and convex under the scanning electron microscope.3. Most of the pollen grans of the Cryptomeria are able to stay at the micropyle of Chinese fir and they can develop to normal in the nucellus of Chinese fir under controlled pollination.4. It takes the ovule of Chinese fir eight months from receiving the grains of Cryptomeria to forming hybrid seeds. In Nanjing Chinese fir is pollinated in the last ten days of March and the gametophytes develop from April to the middle of June. In the first or second ten days of June, it is fertilized. The proembryo begins to develop in the last ten days of June, and early differentiation of the late embryo is in the last ten days of July. The embryo matures in early September and the seeds are collected in November. Each phase of development is normal.5. The development stages and morphological characters of the hybridized embryo are very similar to those of Chinese fir in sexual reproduction. It possesses the general characters of the embryo development in Taxodiaceae. This shows that both of the species are close in consanguinity and that the outbreeding has been believed to be successful between Cunninghamia and Cryptomeria,

References

-

Last Update: 1900-01-01