主根

在根系中主根与侧根氮、磷、钾、钙、铁的变化一致，呈现出生长前期高，中期低，后期回升的趋势，其它元素变化不明显；

In root system , the change trend of N , P , K , Ca and Fe of principal root and branch root was the same .

PLDα1介导ABA调控的拟南芥主根伸长并参与根毛生长

PLD α 1 Modulated ABA-Mediated Main Root Elongation and Regulated Tip Growth of Root Hair in Arabidopsis

镧和低pH值对拟南芥种子萌发和主根生长的影响

Influences of Lanthanum and Low pH Value on the Seed Germination and Taproot Growth of Arabidopsis thaliana

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 .

增加pH值导致主根系生物量下降，高pH配合低磷水平能提高寄主根系生物量。

The biomass of host root system decreased when pH increased and the biomass increased at high pH low phosphorus .

PAT的抑制导致主根变短、侧根和不定根数目减少。

Inhibition of PAT resulted in the shortened primary roots , less and short-ened lateral and adventitious roots .

侧根多集中在根颈下0～5cm主根段。

Lateral roots on taproot were concentrated at 0-5 cm closed to collar .

运用生物测定方法测定了安全剂AD－67对绿磺隆的解毒效应，指示作物玉米的主根长、根鲜重、芽长和芽鲜重与AD－67浓度呈线性关系。

A bioassay was developed for determining the influence of the chlorsulfuron and safener AD-67 in corn seeds . Safener concentration was correlated with root length , root fresh weight , shoot length and shoot fresh weight .

枝、干、主根、侧根中的PPO活性均以5月和3月极显著地高于7月和10月。

The activity of PPO of branch , truck , main root , lateral root is higher in May and March than in July and October conspicuously .

另外通过比较6-BA对主根的抑制效应，可以发现2,4-D的这种抑制效应类似于6-BA作用。

Furthermore , comparing with 6-benzylaminopurine ( 6-BA ) on the inhibitory effect of the primary root , the effect of 2,4-D is similar to 6-BA .

实验结果表明，在Cd胁迫伤害下，玉米幼苗的生长受到抑制，主要表现为株高、主根长下降，叶面积锐减，叶、茎、根的鲜重、干重明显下降；

The results showed that corn seedling was harmed by Cd2 + and its height , main root became shorter , leaf area turned smaller than before , fresh and dry weight of leaf , stem and root decreased .

锌对主根PPO活性的提高也有较明显影响，对其他器官PPO活性有不同程度的抑制作用。10月份锌处理后干中PPO活性比对照下降35.5%；

Zinc made the PPO activity increase in main root and decrease in other organs , and zinc treatment decreased by 35.5 % compared with the control in trunk ( October ) .

PG微生物土壤磷活化剂拌种处理棉花种子，对棉苗的株高、主根长度和干物重有不同程度的促进作用；

Positive effects were observed on seedling height , main root length and dry matter weight on different degree for those cottonseeds had been dealed with PG germ soil p activator beforehand sowing .

切根后苗木的净光合速率（Pn）与对照间存在一定差异，这与主根切断比例有关，刺槐切断1／3处理与切断1／2处理间净光合速率（Pn）差异显著。

After the main root was cut , there is the certain difference of the photosynthetic rate ( Pn ) with the comparison . That is related to the proportion of the main root which are cut .

在浓度相对较低的条件下（＜50mM）硝酸根只影响侧根生长，而对主根没有明显影响；

When the concentration is low ( < 50 mM ), nitrate only influences LR development , and has no effect on primary root .

樟子松种子播种后，随着幼苗的出土，主根即以较快的速度下扎，2个月后幼苗根系已深入到10cm以下的土层，抵抗力相对增强。

After seed sowing of Pinus sylvestris var. mongolica , the root system is grown 10 cm deep to soil in two month . The drought resistance is improved .

花针期喷施适宜浓度的芸苔素内酯（BR），能显著提高花生植株内的硝酸还原酶活性及叶片蛋白质和可溶性糖的含量，使主根的根活力增强。

The treatments with suitable concentration of brassinolide sprayed on leaves of peanut at blossom could promote obviously the activity of nitrate reeducates and the content of protein and dissolvable sugar in leaves , and increase the activity of roots .

DPC处理提高了幼苗主根中部生长素、玉米素及其核苷含量，可能是诱导侧根发生的内在原因。

The levels of endogenous Auxin , Zeatin and Zeatin riboside in the middle segment of primary root were all increased obviously by DPC , which might be the key reason for lateral roots induction .

hpal突变体在根分生组织维持上表现出特异缺陷因而抑制主根生长。

The hpal mutant displayed a specific developmental defect in root meristem maintenance and was unable to sustain primary root growth .

研究表明，Ⅰ-69杨×小叶杨和Ⅰ-69杨×欧洲黑杨F1无性系在最早生根时间、主根数、主根总长度和侧根数等方面均存在极显著差异。

The results indicated that there are highly significant differences in the earliest date of rooting , number of main roots , sum of the lengths of main roots and number of lateral roots in 1-69 poplar × Simon poplar F1 clones and 1-69 poplar × Nigra poplar F1 clones .

结果表明，植物生长调节剂可促进大豆幼苗茎叶生长和主根伸长，增加侧根数，加大根冠比，提高叶绿素含量、脯氨酸含量和过氧化物酶（POD）活性，从而增强了植株的抗旱能力。

The results indicated that the plant growth regulator could increase plant height , main root length , lateral root number , root / shoot ratio , chlorophyll content , proline content and the activity of peroxydase ( POD ), and improve the ability of drought-resistance of soybean seedlings .

新根蘖芽为0a芽，其它龄级与分株的龄级相一致，即1a分株主根芽为1a芽，2a分株主根芽为2a芽。

New buds from a root sucker were 0 a buds , other age classes of buds were consistent with that of ramets , i.e. buds produced from taproots of 1 a ramets were 1 a buds , and so on .

火炬松育苗试验结果表明：火炬松大田育苗最佳的处理组合为苗木密度100~150株/m2、芽苗截根处理以保留芽苗主根长的50%、接种厚环乳牛肝菌Sg；

The seedling experimentation of Pinus taeda was studied . The best combination of seedling was that the seedling density 100 ~ 150 trees / m ~ 2 , retaining half of the main root length of a seedling , and artificial inoculation of Suillus grevillei .

结果表明，苗龄45d的重茬茄苗在株高、叶面积、主根长、总根长方面明显低于正茬，且茄苗地上部和地下部鲜重下降。

The 45-day-old seedlings height , leaf area , main root length and total root length of the eggplants under continuous mono-cropping decreased significantly than of no-replanting eggplants , which resulted in fresh weight reduction eggplants shoot and root .

结果表明，该地区紫花苜蓿的根系主要分布于0～30cm土层，因受到潜水水位及盐分的影响，主根被伤害从而诱导侧根发育是苜蓿适应该地区的主要特征之一。

The results are as follow : Root of alfalfa are mainly distributed in 0 ~ 30cm layer below the surface of soil because of the high paretic water and soil salt - It will induced production of secondary roots after its taproot was severed .

此外，对微管骨架的活体观测显示，GFP-MBD（Col-0）与GFP-MBD/cml24-4主根伸长区外表皮细胞的皮层微管排布趋向存在差异，并且这种差异同样具有琼脂表面接触依赖性，不出现于液体培养环境中。

In addition , in vivo microtubule visualization revealed agar surface-dependent difference in cortical microtubule orientation of epidermal cells in primary root elongation zone between GFP-MBD ( Col-0 ) and GFP-MBD / cml24-4 .

外源CTK通过抑制根分生组织细胞分裂和减小主根成熟区皮层细胞的大小缩短主根的长度；而CTK处理后略微缩小的根分生组织区域也对主根的延伸起到一定的抑制作用。

The exogenous CTK shortens the root length by reducing the cell divisions in root meristem and by decreasing the cortex cell size in root maturation region . A slight decrease in root meristem size after CTK treatment also has inhibitory effect on root elongation . 3 .

在棉花根区20～50cm形成盐分淡化区域，地下水位在临界深度以下，棉花主根区盐碱化程度明显降低，有利于棉花生长。

In the cotton root area 20 ~ 50 cm formation the salt downplay the district , underground water level in the boundary depth below , main root of cotton area salt alkali the degree obviously lower , benefit to the cotton growth .

栽培甘草主根在1.0m土壤深度甘草酸含量较高且有继续增加的趋势，故直接播种方式种植甘草不利于根系采收，造成资源浪费，需要探索更有效的甘草栽培技术。

GA content in taproots of cultivated liquorices at 1.0 m soil depth was higher a trend to increase , so such planting model could reduce root harvest which displayed . To solve such problems , further exploration is needed for effective cultivation techniques for liquorice .

胡萝卜是其植株的主根。

A carrot is the taproot of a carrot plant .