protonema

Study on the Spore Germination and Protonema Development of Pleurocarpous Mosses

侧蒴藓类植物孢子萌发与原丝体发育研究

This paper covers spore germination and protonema development of4 species of mosses from Mt.

研究了山东崂山产4种藓类植物的孢子萌发和原丝体发育特征。

The modified Knop medium was used for medium of culturing protonema ;

梨蒴珠藓原丝体的培养用改良过的Knop培养基；

Protonema development of some Chinese mosses

中国藓类植物原丝体的发育

Spore Germination and Protonema Development of Bryophytes in Hani Peatland in Response to Environmental Change

哈泥泥炭地藓类植物孢子萌发及原丝体发育对环境变化的响应

Describing the characters and developmental features of spore germination and protonema development of moss applied in this research by microscopy .

采用显微观察的方法具体描述了藓类植物孢子萌发与原丝体发育的特征及发育特点。

At a certain time , the protonema cells separated into several individual cells , each develops into a new branch of protonema .

原丝体发育到一定阶段，断裂为单个细胞，单个细胞再萌芽出新原丝体。

Moreover , the much moss of protonemata were gained in medium Knop added 2,4-D or IAA .

添加2，4-D或IAA的培养基上能长出较多的原丝体。

The techniques about carpospore collection , cultivation of protonema , regulation of illumination , measure of induced mature were reported in the paper .

报导了坛紫菜果孢子采苗、丝状体培育、光照调节、促熟措施、壳孢子采苗等方面的技术和经验。

In solid culture , media types , sugars , light , phytohormones , culture density on protonema growth and gametophore induction were investigated .

在固体培养基上，培养基类型，糖类，光照，激素及培养密度对配子枝的诱导均没有显著的影响。

In plant kingdom , having a protonema stage after spore germination is a specific character of moss and a marked difference compared with other plant group .

原丝体发育阶段是藓类植物所独有的特征，也是该类群区别于其它类群的一个显著特点。

The spores are germinated into protonema at about 15 ℃ .

孢子释放以蒴齿的吸湿运动而进行，孢子在15℃左右条件下可萌发成原丝体。

In addition , the asexual diaspores often coexist with rhizoids or protonemata .

此外，无性繁殖体的产生常常与假根、原丝体有共存关系。

Because of the special biological structure of bryology , it was very difficult to transfer foreign gene into the protonema or gametophyte by Agrobacterium-mediated transformation .

由于藓类植物特殊的生物学结构用农杆菌侵染其原丝体或者茎叶体很难实现转化，以原生质体作受体是藓类植物转化的常用途径。

The production of massive protonema immediately follows and then caulonema , chloronema and secondary rhizoides .

孢子萌发后直接产生块状原丝体；块状原丝体上产生轴丝体、绿丝体和次生假根。

Protonema the green , filamentous growth that arises from spore germination in liverworts and mosses and eventually gives rise to a mature gametophyte .

由叶苔或苔藓的孢子萌芽发展而成的绿色丝状生长物，最终发展成配子体。

Pipelike thallus was formed by vertical-division of the middle protonema cells , and top-cell kept horizontal-division .

丝状体顶端以下细胞通过纵分裂形成管状叶状体，顶端细胞始终保持横分裂；

In the life cycle of bryophyte , the protonema stage is the first stage of the spores germinating into gametophytes and the stage is essential for the gametes .

苔藓植物孢子萌发后的原丝体阶段是苔藓植物生活史的第一个阶段，也是发育为配子体必经的阶段。

Every spore divided into 2-cell structure after the first division , and this structure had obvious polarity . The base-cell developed into rhizoid , and the top-cell formed protonema by horizontal-division continually .

孢子首先分裂为2细胞结构，2细胞具有明显的极性，基细胞发育成为假根，顶端细胞不断进行横分裂形成丝状体；

Experiment on two patterns of cultivation including broadcast plantling and offshoots were conducted , the results showed that ① the innovations and protonema are repeated regenerating on the old stems and the gametophores formed on protonema ;

采用撒茎法和分株法2种栽培法培养藓类植物，实验结果表明：①新生枝和原丝体在老茎上反复产生，由原丝体产生配子托；