主根

Both of the elongation rates and the length of apical unbranched zone of main root axis are decrease by P deficiency.

缺磷导致主根轴的伸长速率下降，未分枝长度与对照相比缩短了1 cm。

Ecological characteristics:Seedlings of the tree grow vigorously in the spring with maximum height incensement in early May and a simulated growth of sigmoid shape during the growing season.

生态学特性，彰武松是属于春季生长类型的树种，其苗高累计生长呈S型曲线，全年最大生长量出现在5月上中旬；地径开始生长比高生长晚10d左右，全年出现两次生长，其中以春季生长为主；主根的生长和地径的生长交错进行，和苗高生长基本同步。

During the early growth stage of seedlings, basal stem diameter and paripinnate number were decreased with the increasing of shade, taproot length, root : shoot ratio, total dry weight and leaf area per seedling were maximal under 37.3% NS, specific leaf area was increased with the increasing of shade, but the relative growth rate was declined. Seedlings grew fastest under 0.6% NS, suggesting that nutrients stored in seeds played an important role at the early growth stage. The treatment of 37.3% NS was best for established seedlings in seedling height, basal stem diameter, paripinnate number, rachis length, the maximum sub-leaflet number of individual paripinnate, leaf area per seedling, relative growth rate and net assimilation rate. Light intensity was positively correlated to total dry weight, and negatively to specific leaf area. The maximum of SLA was observed under 15.5% NS.

生长早期的幼苗基径和复叶数随遮荫程度的增加而降低；主根长、根冠比、总干重和单株叶面积均以37.3% NS处理最大；比叶面积随遮荫程度的增加而增大，而相对生长率则降低；幼苗株高在0.6% NS下增长最快，表明种子中贮藏的营养物质对幼苗的早期生长可能具有重要作用。37.3% NS处理对定居后绒毛番龙眼幼苗的生长最有利，幼苗的株高、基径、复叶数、叶轴长、复叶最多小叶数、单株叶面积、相对生长率和净同化率均在37.3% NS处理下获得最大增长；幼苗总干重随光照强度的减弱而降低；比叶面积在15.5% NS处理时最大。

The treatment of 37.3% NS was best for established seedlings in seedling height, basal stem diameter, paripinnate number, rachis length, the maximum sub-leaflet number of individual paripinnate, leaf area per seedling, relative growth rate and net assimilation rate.

生长早期的幼苗基径和复叶数随遮荫程度的增加而降低；主根长、根冠比、总干重和单株叶面积均以37.3％NS处理最大；比叶面积随遮荫程度的增加而增大，而相对生长率则降低；幼苗株高在0.6％NS下增长最快，表明种子中贮藏的营养物质对幼苗的早期生长可能具有重要作用。37.3％NS处理对定居后绒毛番龙眼幼苗的生长最有利，幼苗的株高、基径、复叶数、叶轴长、复叶最多小叶数、单株叶面积、相对生长率和净同化率均在37.3％NS处理下获得最大增长；幼苗总干重随光照强度的减弱而降低；比叶面积在15.5％NS处理时最大。

Curious plant of arid regions of southwestern Africa having a yard-high and yard-wide turniplike trunk with a deep taproot and two large persistent woody straplike leaves growing from the base; living relic of a flora long disappeared; some may be 700-5000 years old.

非洲西南干旱地区的巨大神奇植物，芜菁状树干、深邃的主根和木质带状硬树叶；已长期绝迹的物种的活化石；有些品种的寿命已经有七百至五千年。注意，注意力集中

Curious plant of arid regions of southwestern Africa having a yard-high and yard-wide turniplike trunk with a deep taproot and two large persistent woody straplike leaves growing from the base; living relic of a flora long disappeared; some may be 700-5000 years old.

非洲西南干旱地区的巨大神奇植物，芜菁状树干、深邃的主根和木质带状硬树叶；已长期绝迹的物种的''。'活化石'。''；有些品种的寿命已经有七百至五千年。

Root and tropistic responses by mediating the expression of PINs.

输、内源生长素分布的调控，它通过调节PIN 基因的表达而影响植物下胚轴伸长、主根生长

This paper reviewed microsclerotia or spores in soil are stimulated to germinate by host root exudates, hyphae colonizes on the surface of root, pathogens penetrate epidermis and develop in cortex, expand on stem and leaf, and symptom development, shows that host plant develops various barriers to restrain this fungus invasion.

本文系统探讨了土壤中微菌核或孢子受寄主根系分泌物的刺激，开始萌发、产生的菌丝在寄主根表面定殖、穿过表皮、在皮层中发生及在寄主体内扩展和症状形成等黄萎病菌侵染棉花的过程，阐述了寄主植物形成多级防御反应阻击病原菌的入侵。

The main roots lignified. Fibrous roots became less.

根系主根木质化，须根变少，颜色变暗。

And 0.3mg/L treatments the plants were significantly inhibited. The plants grew slowly and were short. Gourd-shaped balloons became smaller or even disappeared. The leaves had big or small yellow-patch and had thinned. Only a handful of plants Flowered. The main roots lignified. Fibrous roots became less. Its color became lighter.

在镉浓度0.1和0.3mg／L溶液中的凤眼莲的生长明显受到抑制，植株生长缓慢，矮小；葫芦状的气囊变小甚至消失；叶片有不同程度的黄斑，厚度变薄；只有个别植株开花；根系主根木质化，须根变少，颜色变浅。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。