根冠

NaCl胁迫下，轻度的盐胁迫对根系生长的促进作用不如对茎叶的大，重度盐胁迫时，根系快速生长，使根冠比加大。

The effects of moderate NaCl stress which boosts the growth of roots system less than stems and leaves while under severe salt stress the roots system grow rapidly thus increase the root cap ratio .

根尖直径1～1.5mm，长轴方向有根冠、分生区、伸长区和成熟区4个分区，成熟区上有大量的根毛；

Can be divided into four zones which are root cap , meristematic zone , elongation zone and maturation zone where many tubelike root hairs extending from the exterior wall of the epidermis cell .

根和根冠被一鞘状结构，即胚根鞘所覆盖。

Both root and root cap are covered by a sheath-like structure called the coleorhiza .

施用P肥可以提高植株根冠比，增强植株抗性；

The fertilizer experiment result showed that P could increase root to shoot ratio , elaborate seedling resistance ;

结果表明，大气CO2浓度升高，促进了大豆根系生长，大豆根体积、主根长、根鲜重均呈增长趋势，根冠比增加。

The results showed that growth of root system was promoted under high CO_2 levels .

N肥可以促进苗木快速生长，但对于苗高的控制和增加根冠比不利。

N could accelerate the growth of seedlings , but harm to the control of height and the increase of root to shoot ratio .

此外，冠层WUE与根冠比率呈显著负相关。

In addition , Canopy WUE is inversely related to root / shoot ratio .

HMC毒素引起玉米根冠活细胞凋亡的荧光显微观察

Apoptosis in Detached Corn Root Cap Cells Treated by HMC-toxin Under Fluorescent Microscope

玉米根冠比随酸雨pH降低显著降低，轻度酸雨使苋菜低根冠降低的程度较重度酸雨的大。

Root / shoot ratio of maize decreased significantly with the decline of acid rain pH , while that of amaranth decreased more under mild acid rain than severe acid rain .

对有关试验数据进行相关分析的结果表明：在缺锌条件F，供试青菜品种植株地上部分的累积吸锌量与其根系活性吸收表面积、根长及根冠比均呈显著或极显著正相关。

Results from the correlation analysis of the related data showed that there was a significantly positive correlation between the shoot Zn content and their root parameters under Zn-deficient conditions .

随着水分亏缺程度的加剧，H2O2的分布区域从根冠向分生区和伸长区逐渐延伸，H2O2的含量也逐渐增多。

As the water deficit extend is aggravating , the accumulation of H2O2 increased and extented from root tip to meiosis zone .

结果表明：与抗旱性联系紧密的公共通用指标有SOD、可溶蛋白及根冠比。

From above , such as traits SOD 、 soluble protein and the ratio of root to stem are all closely related to drought resistance of those five tree species .

对红皮云杉与白扦研究表明，在CO2浓度倍增条件下，氮素营养供应充足，其他条件不受到限制时，植物的根冠比不受到大气CO2浓度升高的影响。

The study showed that under the double CO2 concentration , sufficient nitrogen , and no other condition stress , the ratio between root and crown can not be affected by elevated CO2 concentration .

m-2两个密度水平。结果表明，升高CO2浓度可促进红桦幼苗生物量的增加，但对根冠比没有显著影响。

The results showed that red birch biomass was stimulated by CO2 enrichment , while the root to shoot ratio was not affected .

结果表明，供Zn和添加CaCO3对小麦幼苗生长量和根冠比均无显著性影响，3种基因型小麦间亦无显著性差异；

The results showed that Zn supply or CaCO_3 addition had no significant effects on seedlings biomass and root / canopy ratio , and there was no significant difference among the three genotypes .

结果表明，无论缺磷与否，CO2浓度升高均能显著增加番茄地上部及根系的干物质积累量，提高根冠比。

The results showed that elevated CO2 significantly increased the dry matter accumulation of shoot and root , and root / shoot ratio of tomato seedlings no matter P was deficient or not .

HMC毒素对雄花不育及正常细胞质玉米根冠活细胞的影响

The Specificity of Bipolaris maydis Race C Toxin on Root Cap Cell Tests with Male Sterile and Normal Cytoplasm of Zea Nays

这些性状的变化密切关系到抗旱指数（DI），除千粒重、根冠比的变化率与DI的相关性未达到显著水平以外，其余性状的变化率与DI达到了显著或极显著相关。

These characteristics were closely related to the drought index ( DI ), the change ratio of above characteristics were significant closely related to the DI expect for 1 000 grain weight .

大豆品种的株高、根茎叶生物量、总叶面积和总叶片数在UV-B作用下减少（或降低），根冠比发生改变。

Increment of UV B decreased soybean height , dry weight of root , shoot and leaves , total leaves number and total leaf area in all cultivars .

pH值对试管苗平均根系数量、根粗、根长和根冠比影响显著，生根数与平均根长随pH值升高而减小，平均根粗与根冠比随pH值的增大而增大；

PH value had significant effects on root number , root diameter , root length and root-shoot ratio of test-tube plantlets cultured with different media , pH value increased , root number and average root length decreased , root diameter and root-shoot ratio increased .

本研究还利用荧光标记和激光共聚焦显微镜相结合的方法，研究了HMC毒素对同核异质体玉米根冠细胞微丝骨架分布的影响。

The research was engaged in the effect of HMC toxin on microfilaments of N and C cytoplasmic male-sterile maize by fluorescence technique and confocal scanning microscopy .

除高强度UV-B辐射使玉米根冠比降低外，其余UV-B辐射单独处理时对两种植物根冠比均无显著影响。

The UV-B irradiation had no significant effect on the root / shoot ratio of these two plants except for root / shoot ratio of maize reduced by high level UV-B irradiation .

根冠比以7月为最低，分层营养物质在30cm以下积累。

The value of root-shoot ratio was the lowest in July , and the nutriment accumulated under the soil depth of 30 cm .

与对照相比，NaCl胁迫下草莓根冠比减小，而钙盐胁迫下草莓的根冠比增大，且各盐处理内均随盐浓度增加而增大。

The strawberry reduced its root-shoot ratio under NaCl stress and increased its root-shoot ratio under calcium salt stresses compared with it under the control , and these effects became intensified as the concentrations of the salts increased .

黄腐酸对作物根冠通讯影响的研究以根源信号ABA（脱落酸）参与作物气孔行为调控为代表的根冠通讯学说得到了大量证据的支持和论述。

Recently , lots of studies have supported the theory that the root sourced abscisic acid ( ABA ) played a central role in the root-to-shoot long distance signaling process and is an effective stomatal closing agent .

旱稻品种巴西陆稻根冠比（R/S）在干旱胁迫后显著上升，上升幅度达28.8%，而不同常规稻品种根冠比（R／S）在干旱胁迫后的变化均不明显。

After drought stress , the root to shoot ratio ( R / S ) of Brazilian upland rice varieties increased significantly , the rising extent was 28.8 % , but the root to shoot ratio ( R / S ) of normal rice varieties changed few .

以不同pH值的溶液模拟酸雨对6种南方城市常用的绿化植物进行处理，来研究酸雨对植物叶面积、单叶质量、根冠比等形态学效应的影响。

The morphological effects of acid rain on the leaf area , the weight per leaf , and the root / crown of plants were studied by using different pH solutions to simulate acid rain and treating 6 species of common green plants in the southern cities .

4烯效唑处理提高了玉米苗期的抗旱性，在干旱条件下植株根冠比增加，叶片SOD活性提高，质膜相对透性和MDA含量相对减少，同时减缓了光合速率和叶绿素含量的下降过程。

S-3307 treatments increased root-top ratio and the superoxide dismutase activity , prevented electrolyte leakage and the enhancing of MDA content , reduced the injuries caused by the soil drought in chlorophyll , and inhibited the reducing of photosynthetic rate during water stress .

结果表明，RDI对作物根冠生长及其关系的影响因不同作物、不同水分调亏阶段和不同水分调亏度而有所不同。

The results indicated that there were differences in effects of RDI on crop morphological development due to different crops , growing stages and degree of water deficit .

VAM对根尖的侵染率差异以分生区最显著，并可诱导形成根原基；VAM可侵染根冠。

The most high infest rate of VAM to root tip is the meiosis zone , VAM can induce root primordium here , VAM also can infect the root cap .