苏铁

Jia-rui Chen of the Chinese Academy of Sciences studies living cycads in south China, one of the richest areas of cycad diversity in the world.

陈家瑞在中科院研究生活在华南苏铁，最丰富的地区的苏铁属植物的多样性在世界上。

This paper studies the anatomy of stem and leaf stalk of Cycas debaoensis.

对德保苏铁茎、叶柄的解剖构造进行观察，结果表明：(1)德保苏铁的茎由周皮、皮层、维管束、髓四部分构成。

The reflection of RAPD cluster to the genetic relationship of all the species showed that RAPD was suitable for analysis of interspecific genetic relationship in Cycas.

聚类分析结果基本反应了苏铁属各个种间的亲缘关系，证明了RAPD适用于苏铁属种间亲缘关系分析。

In this paper, the reaction system of RAPD in Cycas had been established and applied to discuss the relationships among C. hainanensis, C. taiwaniana, C.

通过优化苏铁属植物的RAPD反应体系，进而探讨苏铁属部分种类的亲缘关系。

On the basis of reviewing the resource status of Cycas guizhouensis in Guizhou province,the reproductive biology of this species including female/male ratio,pollination mechanism,characteristics and germination of seed,seed dispersal and natural regeneration ability were described.

在对贵州苏铁的分布及资源现状作出评述的前提下，从其植株的雌雄比及其传粉机制，种子的特征及其萌发与生长，种子的传播与其自然更新能力等方面，论述了贵州苏铁的生殖生物学特性。

Investigating the ecology environment and present situation of the endemic Cycas plants to Yunnan, especially the population structure and dynamics of C. Hongheensins and C. tanqingii. The results show that C. hongheensis is a critically endangered species because the number its individuals had decreased by 47% from 1992 to 2002 and no flowering and fruiting tree has found. While the population of C. tanqingii in Xiaoheijiang River is in a status of restoration because there are more young individuals and its age structure takes on the relatively stable shape of pyramid.

对云南苏铁属特有植物的生态环境、现状等进行了较为全面的调查，特别是对红河苏铁、潭清苏铁的种群结构和动态进行较为详细的调查，结果表明红河苏铁是一个极度濒危的种，2002年的个体数量比1992年减少了47%，连续3年的调查未发现具繁殖能力的个体；而潭清苏铁种群的年龄结构基本呈金字塔形，属较稳定的结构，且处于恢复期，繁殖更新基本正常。

13 Cycas species were conserved ex situ in Kunming Botanical garden, 8 of which were conserved ex situ in Kunming Botanical garden for the first time. All but C. hongheensis grow well up to date.

在昆明植物园建立了苏铁迁地保护区，迁地保护苏铁属植物13种，新增种类8种，到现在为止，除红河苏铁外，所有种类生长良好。

Cycas panzhihuaensis is a new kind of Cycas that was discovered in 1971, it was formally named in 1981 and it was labeled as the first batch endangered plants in 1984.It is a kind of relics species.

攀枝花苏铁是1971年发现的苏铁新种，1981年正式定名，1984年被列入我国第一批珍稀濒危植物名录，属于世界珍稀濒危植物残遗物种。

The tissues of leaf of Cycas taiwaniana,Bowenia serrulata and Dioon eduleand tissue of root of Macrozamia longispina of cycads,and leaves of Michelia alba and Amygdalus persicaof angiosperm were observed by scanning electron microscope.

对苏铁属的台湾苏铁、波温铁属的细齿波温铁、双子铁属的双子铁叶的羽片，大泽米铁属长刺大泽米铁的根，以及被子植物的白兰和桃的叶组织进行了电子扫描显微镜的观察研究，结果表明，2个科4个属苏铁植物的导管类型是丰富的，导管的结构组成方式、发育过程与被子植物是一致的；例如导管端壁倾斜度等结构特征显示，一些被子植物导管的结构比苏铁类植物的要原始。

The 28 species of Cycas debaoensis, Stangeria eriopus and Macrozamia moorei etc.in 3 families of Cycadopsida were carried out anatomical studies on vascular tissue, the roots ,stems and leaves of these materials were made histological section by paraffin method and freeze method ,light microscopy observation and the dissociated materials of every organ for light microscopy and scanning electron microscopy observation research.

本探究对苏铁纲3个科的德保苏铁、托叶铁、摩瑞大泽米等28个苏铁种类进行了维管组织的解剖学研究，其中对其根、茎、叶进行石蜡切片和冰冻切片观察研究；对各器官材料进行组织离析，光学显微镜和扫描电子显微镜观察研究。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。