主根

Under soil water stress, the biomass of Atriplex canescens reduced, ratio betweenroot and stem increased, the main root becomes long, branches and lateral rootsreduced, and its growth is restrained.

土壤水分胁迫下四翅滨藜的生物量显著降低，根茎比增加，主根伸长，分枝数和侧根数明显减少，生长发育受到抑制。

METHODS: 27 maxillary second bicuspid teeth with two canals and one isthmus were divided randomly into 3 groups with 9 in each.

27颗根管结构为一个峡部连接2个主根管的离体上颌第二前磨牙，随机均分为3组，分别采用3种处理方式进行倒预备。

4 Had the most intensive herbicidal activity. The inhibiting rate of No. 4 was 95.8%, 93.76% and 86.36% against the taproot ,caulis and the bourgeon of retroflexus L. respectively.

经HPLC分离后得到8个馏份，其中馏份4的除草活性最强，对反枝苋的种子萌发抑制率为86.36%，主根生长抑制率为95.84%，主茎生长抑制率为93.76%。

With age adding, the area ratio of phloem and xylem decreases in Ch.smyrnioides . Differentiation of vascular cambium is active in 3～4 years root.

不同年龄的明党参主根随根龄的增加，韧皮部与木质部的比例减小，维管形成层在三至四年生根中活动最旺盛。

The results show that salt tolerance of four test materials are improved, and the germination rate, coleoptile length and main root length of four materials are inhibited but the degree of inhibition is significantly less than "Hua30".

结果表明，4个供试材料的耐盐性均较好，4个供试材料的发芽率、胚芽鞘长度、主根长度尽管受到显著的抑制，但抑制程度均明显小于花30。

Co-culture with Haloxylon ammodendron, the primary haustorium conglutinate with young roots of the host (0.1 mm), pass through the host's epidermis and cortex, then connect with the vascular bundle and transform into secondary haustorium, shaped by fundamental tissues of differentiation and development.

肉苁蓉与寄主梭梭共培养，其初生吸器主动与寄主幼根（0.1mm左右）黏连，穿过寄主根表皮和皮层后与维管束连通形成次生吸器，肉苁蓉植物体分化、发育的基本组织形成。

Hosta ventricosa in control group grew ordinarily. The diameter of can reach 2 cm. The plants were vertical and straight. The main roots have a lot of fibrous roots. They were white. The leaves were green. 80% of the plants flowered in July.

空白组的紫萼玉簪在整个实验期内生长正常，根状茎粗达2厘米，植株直生，主根密生多数细长须根，呈白色；叶片绿色，在7月时80％的植物开花。

In Cd 0.3mg/L treatment the lignification of the main roots was particularly serious.

在镉浓度0.3mg／L浓度中的凤眼莲，主根木质化程度尤为严重。

Its color became lighter. In Cd 0.3mg/L treatment the lignification of the main roots was particularly serious.

在镉浓度0.3mg／L浓度中的紫萼玉簪，主根甚至大的侧根木质化程度尤为严重。

The effect of neodymium on root tip cell was similar to that on mesophyll cell. The influence of neodymium on cell ultrastructure was more evident in root.

钕对油菜主根根尖细胞的作用与对顶叶叶尖细胞作用类似，但对根细胞超微结构影响更为明显。

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。