查询词典 root cap

The results showed that compared with soil culture, the root cap was not obvious with less amyloplast and polysaccharose substance under water culture. The root epidermis under water culture was thinner than that of soil culture, with little root hair or not, in which cortex parenchyma tissue developed with big cell, solution proliferative aerenchyma in intercellular space, and thin cell wall. However, the root cap under soil culture was big, with strong PAS reaction and no aerenchyma tissue.

结果表明：水培后根冠不明显，淀粉体较少，多糖类物质较少而土培根根冠体积较大，淀粉体较多，多糖类物质多，土培根PAS反应强烈；水培根表皮厚度比土培根小，水培根根毛少或退化消失；水培根皮层薄壁组织发达，细胞大型，壁薄，细胞间隙中含有溶生性通气组织，土培根皮层未见通气组织。

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

根和根冠被一鞘状结构，即胚根鞘所覆盖。

New cells are cut off on the lower side to form new stem tissue at the stem apex, and on both sides in the root apex to form root tissue and a protective root cap.

顶端分生组织产生的新细胞沿根或茎的长轴方向排列，沿其长轴方向增加细胞的数目。

Hairy roots were induced from tobacco leaves with Agrobacterium rhizogenes LBA1334 harboring agropin type PRil855 and binary vector PIG121HM carrying a kanamycin resistant gene nptll and GUS gene and the good hairy root clones were selected. The root with many root hairs and branches grew vigorously toward all the direction on MS medium without plant hormone and on kanamyain containing medium (km:30mg/L). The structure of the hairy root tip is different from that of ordinary root. Witch was not typical root cap maybe the main cause of losing the geotropism of hairy root. Plantlet regenerated from hairy root when cultured on Ms medium without plant hormone. The nicotine content of the hairy root was little higher than that in the natural roots.

本研究通过发根农杆菌工程菌LBA1334(含有野生型pRi1855质粒和pIG121HM双元载体质粒，编码NPTⅡ基因和GUS基因)转化烟草沙姆逊，获得了具有卡那霉素抗性烟草发状根，并筛选出良好的单克隆株系，该发状根具有典型的发状根特性(多根毛、多分支、在无激素培养基上快速生长)，通过根尖压片分析，烟草发状根不具备典型的根冠；发状根中烟碱含量1.61％稍高于与天然栽培品种母体根的含量(1.5％左右)，发状根向培养液中释放烟碱，释放量最多时占总烟碱量的81.1％；在无激素的培养基上获得了再生植株。

This artical summarized the research progress on hydrotropism of plant root system internationally from three aspects such as,how to induce hydrotropism by roots, root cap is the site of apperceiving humidity gradient,and the research on hydrotropism at the molecular level.

主要从根部如何诱导向水性、根冠是感知度梯度部位及在分子水平对向水性研究3个方面，总结了国际上植物根系向水性研究的进展。

Although both of FDRMADS7 and FDRMADS8 wereexpressed in the root, they have different expression pattern.The transcripts of FDRMADS7 weredetected throughout the root,especially the expression in the root meristem was the highest.However,the expression of FDRMADS8 was mainly localized in elongation and mature rigion.No apparent expression signal was detected in the root cap, root meristem and pericycle cells.

虽然FDRMADS7和FDRMADS8都在根中表达，但它们在根中的表达模式也不相同：FDRMADS7在根中到处表达，尤以生长点处表达量最高；而FDRMADS8在伸长区和根毛区的皮层中有大量表达，在根冠，根尖分生区和根毛区的中柱鞘细胞中却无明显表达，暗示它们在根中行使的功能也不相同。

Excied root apex explants of seedlings from Mormodes Jumbo Odin × Catasetum expensum were induced to from PLBs in MS medium supplemented with BA (0.5 mg/l ). Histological observations confirmed that root cap were disorganized at early stage and followed by vascular strand of existing roots protruding into PLBs formation.

以不同时期的根类原球体为材料经石蜡切片后发现，早期会先在根尖端形成球状突出，随著根类原球体膨大，根培植体的维管束延伸到球体之中并支撑著尖端形成芽原基，而后根类原球体顶芽长出维管束成为植株。

Root border cell s, previously referred as sloughed root cap cell, is a special cell population, which separates in large number from the periphery of the root cap and accumulates in the root tip.

以四季豆为研究材料，研究了四季豆根边缘细胞数目和存活率的变化及不同浓度铝对四季豆根边缘细胞的影响。

Root border cells, previously referred to as sloughed root cap cells, is a special cell population which separates in large numbers from the periphery of the root cap and accumulates in the root tip.

潘建伟 ，朱睦元，彭华正，王利琳植物根边缘细胞是从根冠表皮游离出来并聚集在根尖周围的一群特殊细胞，以前曾称为根冠脱落细胞。

Observations from the paraffin dissection showed that, the anatomical structures of treated upland rice root tip cells changed obviously, such as the arrangement confusion of cells from apical root meristem, quiescent center and root cap, increased middle lamella, the increased width and reduced elongation of cortex parenchyma cells, and the large numbers of slough off epidermis cells.

石蜡切片的结果表明，和对照相比，化感物质处理后的旱稻幼苗根尖的解剖结构发生了明显的变化，主要表现在顶端分生组织、静止中心和根冠的细胞排列混乱，细胞间隙加大，皮层薄壁组织细胞变得短而粗，以及表皮层细胞大量脱落等。

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。