根段

On semi-solid medium, P. brassicae invaded into cells of cut surface of root segments and made the cut surface swell.

在半固体培养基内，根肿菌侵入根段切口处的细胞内，并很快使切口处膨大起来。

It was proved that the root colonization dynamics and density of rhizobium population played an important role in competitive nodulation.

并且发现在此区段的主根瘤发光比例高达90％以上，显著大于此区根段的侧根瘤发光比例，从而说明种子表面的接种根瘤菌主要是沿着主根的伸长而向下扩散定殖。

To probe into either the attractiveness to or avoidance from phylloxera of grape rootstocks and cultivars with different tolerance, as well as into the volatile components from their roots, the method of invitro root segment culture was used to investigate the selectivity of Phylloxera viticola Fitch to the roots of grape rootstocks '5BB' and '140Ru' and cultivar 'Kyoho'.

为了探讨不同抗性水平砧木及品种对根瘤蚜吸引及驱避效应以及鉴定挥发性物质组分，采用离体根段培养法测定葡萄根瘤蚜Phylloxera viticola Fitch对砧木5BB，140 Ru及栽培品种巨峰的选择性，发现根瘤蚜对栽培品种巨峰的根段具有很强的选择性，至接种后3d，67.13%的根瘤蚜优先选择巨峰；而对5BB和140 Ru的选择性却很差，分别有15.29%和17.58%的根瘤蚜选择5BB及140 Ru。

Typical structures of dark septate fungal endophytes, and arbuscular mycorrhizas were found in the roots of nearly all the individuals examined.

天山雪莲的根段，用10％KOH解离，萃酚兰或酸性品红染色，标本片置光学显微镜下观察，可观察到Dark Septate Endophyte真菌的典型结构和VA菌根菌的典型结构共同存在。

The mode of germination of S. sinuosa was by extension of hyphae around the sporocarp.

菌丝在培养基质中生长良好，能够侵染根段形成大量的丛枝和根内泡囊。

In vax / VMS, a path away from the root of the tree

在DEC的操作系统vax/VMS中，从树结构的根段离去的路径。

In the process of root cutting, the root accumulated a lot of soluble sugar and soluble protein, which provided material and energy for the cell differentiation. As root differentiating, soluable protein was continuously used up. During 10 to 20 days, the content of soluble sugar and soluble protein in the basipetal top and end of rootkept comparatively stable, then declined as adventitious buds and roots growing. 40 days later, they kept invariable, because the newly formed bud can photosynthesize and the newly formed root can absorb nutrient from outside. The dynamic balances of endogenous hormone regulate adventitious buds and roots of the root. During callus growing and adventitious bud differentiating.

上部根段在细胞分化前期积累了大量的可溶性糖，为后期的分化提供能源物质，同时积累了大量的可溶性蛋白质，为愈伤组织的产生提供能源，而后随着分化，可溶性蛋白质不断被消耗。10～20d根段上部及下部的可溶性糖、可溶性蛋白质含量保持在相对稳定的水平变化不大，后期随着不定芽及不定根的生长下降较快。40d后，新形成的芽已经能够进行光合作用，新形成的根也可从外界吸收营养物质，可溶性糖、可溶性蛋白质含量基本保持不变。

The results showed choosing the diameter as 1.0~2.0cm thick root segment, the length is above 15cm, using 108 Sheng Gen Fen or Du Gen Su to declinate cuttage, the survival rate can reach to 70%,And they can become independent plant.

结果表明：选择直径为1.0~2.0cm粗的根段，长度为15cm以上，使用108生根粉或杜根素药剂处理后，进行斜向扦插，成活率能达到70%以上，并成为独立的植株。

In the present study a solution culture method was developed to test the effects of mycorrhiza formation on organic acids.

本试验改固体培养基为营养液培养基，采用静止的培养方法，在培养四个月时发现，萌发孢子的菌丝生长良好，菌丝已经侵染了根段，形成了根内菌丝，同时也观察到大量辅助细胞的存在；培养六个月后，形成了成熟的新孢子，说明营养液静止培养菌根共生联合体的方法是成功的。

I succeeded in establishing a mycorrhizal symbiosis between S. sinuosa and transformed Ri T-DNA carrot roots for the first time. The S. sinuosa sporocarps were found not to occur as single spores, but were observed to survive in groups of sporocarps in the environment.

利用双重培养方法首次成功培养了S.sinuosa的菌根共生联合体。S.sinuosa不是单个孢子，而是以孢子果的形式存在于自然界中。S.sinuosa孢子果的萌发是从孢子果的四周伸出芽管，在侵染根段的过程中，形成大量的营养孢子。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。