叶原基

Secondly, according to the stem and leaf anatomy, leaf epidermis, pollen morphology and floral development, it is found that there are no close relations between Acorus and Typhales, especially in the aspect of floral development. In the course of floral development of A. calamus, neither bracteloe primordium nor common primordium occurs in the whole course. Early development of the flower is strongly unidirectional. Three shield carpels develop into a pistil. In Sparganium fallax, each female flower has a bracteole. The bracteole primordium and the floral primordium originate from a complex structure. A single saccate carpel develops into a pistil. In staminate flowers, petal and stamen primordia initiate spirally.

菖蒲属与香蒲目的茎叶解剖特征、叶表皮特征、花粉特征及花器官发生特点等亦存在着明显区别，特别是花器官发生特点差异尤为显著，如菖蒲属花器官发生过程中，没有苞片原基，也不存在任何形式的复合原基，花被与雄蕊原基均以单向性方式发生，雌蕊由3心皮发育而成，具有"盾状心皮"的特点等，黑三棱属则有苞片原基发生，且苞片原基与雌花原基起源于共同的复合结构，雄花的花被原基和雄蕊原基均以螺旋状方式发生，雌蕊由单心皮发育而成，未发现有2或3个心皮原基或其痕迹的现象，体现出"囊状心皮"的特点。

This is the development of the primordium related to the degree that different species and there have been noticeable differences.

这与叶原基的发育程度有关，不同的品种也有明显区别。

Primordium, the establishment of leaf adaxial-abaxial polarity, and the expansion of leaf blade .

早期叶片发育包括三个主要过程：叶原基的起始，叶片腹背性的建立和叶片的延展。

The leaf primordium divides tangentially, then divides in various directions, and forms a young leaf.

叶原基首先进行切向分裂，然后进行各个方向的分裂形成幼叶。

KNOX I genes and ARP genes function antagonistically to each other in simple leaf development. Compound leaf development presents a very different case from simple leaf development.

在单叶发育中KNOX I基因和ARP基因之间的拮抗关系是通过表达模式互补实现的，ARP基因在叶原基表达并抑制KNOX I基因表达。

GA3 contents, POD activities and invertase activities started to increase significantly while IAA contents started to decrease significantly when plants entered the critical stage of flower-bud differentiation; GA3 contents, POD activities and invertase activities emerged high apex value while IAA contents emerged low apex value when plants entered stage of primar...

当植株进入花芽分化临界期时，叶片中GA3含量以及POD和转化酶活性均开始剧增，而IAA含量开始剧减；当植株进入第1侧花茎原基分化期和第2～3侧花茎原基分化期，叶片中GA3含量和POD、转化酶活性均出现一高峰值，而IAA含量出现一低峰值。可见，青花菜侧花茎每一级的花芽分化要求较高含量的GA3、较低含量的IAA和较高活性的POD、转化酶。

Secondly, according to the stem and leaf anatomy, leaf epidermis, pollen morphology and floral development, it is found that there are no close relations between Acorus and Typhales, especially in the aspect of floral development. In the course of floral development of A. calamus, neither bracteloe primordium nor common primordium occurs in the whole course. Early development of the flower is strongly unidirectional. Three shield carpels develop into a pistil. In Sparganium fallax, each female flower has a bracteole. The bracteole primordium and the floral primordium originate from a complex structure. A single saccate carpel develops into a pistil. In staminate flowers, petal and stamen primordia initiate spirally.

菖蒲属与香蒲目的茎叶解剖特征、叶表皮特征、花粉特征及花器官发生特点等亦存在着明显区别，特别是花器官发生特点差异尤为显著，如菖蒲属花器官发生过程中，没有苞片原基，也不存在任何形式的复合原基，花被与雄蕊原基均以单向性方式发生，雌蕊由3心皮发育而成，具有&盾状心皮&的特点等，黑三棱属则有苞片原基发生，且苞片原基与雌花原基起源于共同的复合结构，雄花的花被原基和雄蕊原基均以螺旋状方式发生，雌蕊由单心皮发育而成，未发现有2或3个心皮原基或其痕迹的现象，体现出&囊状心皮&的特点。

The results were as follows:1 The explants with two phyllomes(about 0.2-0.5mm in size )were found to be suitable for virus-free seedling culture , which were cultured on solid MS medium supplement with 6-BA,NAA and IAA ,The result indicated that the plantlet was over 30% after three months.

主要结果如下： 1。取带2个叶原基(长度约为0.2-0.5mm)的茎尖为外植体，在附加6-BA、IAA和NAA的MS培养基上进行3个月的培养，成苗率达30％以上。另外，在切取茎尖前对薯苗热疗(37℃)4周，在基本不影响成苗率的同时，可大幅度提高脱毒率。

Can improve the survival ratio of seeding. Culturing in hormone media can make meristem tip survive once time, and the result is better than two-time-cultivation.3、The meristem tip with two phyllomes(0.3-0.4mm in size)were found to suitable for virus-free seeding culture that were cut from aseptic seeding, which led to higher survival and virus-free ratio, up to 72.1%and 54.2%.

在培养基中添加椰汁、香蕉汁等有机添加物可以明显提高成苗率。3、采用二次剥离茎尖的方法，从无菌试管苗上切取带2个叶原基(大小0.3-0.4mm)茎尖分生组织培养，成苗率为72.1%，脱毒率为54.2%。

Besides playing an apparently key role in wall expansion, expansins have been implicated in an increasing number of processes including cell enlargement, seed germination, root hair formation, root growth, leaf primordium initiation,leaf growth, softening of fruits, fruit abscission and growth of the pollen tube of grasses through the stigma and the style.

目前认为扩张蛋白几乎参与了植物的整个发育过程：除具有增大细胞的功能外，扩张蛋白在细胞生长、种子萌发、根毛形成、根系生长、叶原基形成、叶子生长发育、果实成熟、器官脱离，以及花粉管生长方面起着重要的作用。

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。