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单词 meristem
释义

meristem /'merɪstem//'mɛrɪ,stɛm/

英汉-汉英词典
n. 分生组织;分裂组织
形容词: meristematic
词组 | 习惯用语
apical meristem [植]顶端分生组织
英语例句库
  1. In root meristem it is also called periblem.
    根部分生组织也称为皮层原。
  2. The differentiation of the cells derived from the primordial meristem forms protoderm,ground meristem and adsperse procam-bium strand.
    其衍生细胞分化为原表皮、基本分生组织和散生的原形成层束。
  3. The structure of the root apex of Pyrus betulaefolia Bunge consists of the stelar meristem,cortical cells and the root cap.
    杜梨根端的结构,可分成中柱分生组织,皮层细胞和根冠。
  4. The results showed that the prime symptoms of the TPD include laticifer necrosis and cambium-like meristem formation that occurs around the necrotic laticifer in the inner bark.
    结果表明该病的基本症状是在树皮内层发生乳管坏死和在坏死的乳管周围产生形成层状分生组织。
  5. Ground meristem The central region of the apical meristem from which the ground tissues of pith, cortex, medullary rays, and mesophyll differentiate. In root meristem it is also called periblem.
    位于顶端分生组织的中部,髓、皮层、髓射线以及叶肉这些基本组织均是由基本分生组织分化而成。根部分生组织也称为皮层原。

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原声例句
Crash Course 植物学篇

They also have lateral meristems that allow roots and stems to thicken as the plant grows.

它们也有侧面分生组织,使根和茎随着植物生长而变粗。

经济学人-科技

Instead of being a cone containing a meristem it will be a cone containing a motor, a light-emitting diode and a battery.

两者都是圆锥结构,不过前者里面有一个分生组织,而后者里面是电机,发光二极管和电池各一个。

Crash Course 植物学篇

As the plant grows, stem cell clusters called meristems generate new xylem cells, which form bigger pipes to suit the plant's needs.

随着植物的生长,被称为分生组织的干细胞簇产生新的木质部细胞,这些细胞形成更大的管道以适应植物的需要。

Crash Course 植物学篇

If the root needs to branch off, a new root with its own meristem busts out from the center of the old one, Alien-style.

如果根需要分支,一个带有自己分生组织的新根就会像外星来物一样从旧根的中心伸出来。

Crash Course 植物学篇

Clusters of stem cells, called apical meristems, at the tip of every stem and root continually produce the materials needed to build new body parts.

在每个茎和根的尖端,被称为根尖分生组织的干细胞群不断地产生构建新身体部位所需的材料。

Crash Course 植物学篇

At the point where each leaf meets the stem, there's a bud, which is a new meristem that has the potential to grow into a branch and start producing its own stem and leaves.

在每一片叶子与茎相遇的地方,就会有一个芽,这是一个新的分生组织,它有可能成长为一个分支,并开始产生自己的茎和叶。

中文百科

分生组织

Corte de meristemo apical de raíz de cebolla, con mitosis en diversos estados.
Producción de células comprometidas y diferenciadas por las células madre meristemáticas
Zonación histológica y por capas en el meristemo apical del tallo

分生组织指植物中具有分裂分化能力的细胞。这些细胞体积小,有着相对较大的细胞核,没有或者薄细胞壁。胞内被原生质充分填充。细胞排列紧密。

分生组织是植物中有特色的一个组织。植物在理论上有着潜在的永生能力,原因是其分生组织具有全潜能性。

分生组织按来源来分类,可划分为原分生组织(urmeristem),初生分生组织(primary meristem)和次生分生组织(secondary meristem)。按位置划分则有顶端分生组织(apical meristem),居间分生组织(intercalary meristem),侧生分生组织(lateral meristem)和拟分生组织(meristemoid)。.

英语百科

Meristem 分生组织

Tunica-Corpus model of the apical meristem (growing tip). The epidermal (L1) and subepidermal (L2) layers form the outer layers called the tunica.  The inner L3 layer is called the corpus. Cells in the L1 and L2 layers divide in a sideways fashion, which keeps these layers distinct, whereas the L3 layer divides in a more random fashion.
Organisation of an apical meristem (growing tip) 1 - Central zone 2 - Peripheral zone
3 - Medullary (i.e. central) meristem
4 - Medullary tissue
Shoot apical meristems of Crassula ovata (left). Fourteen days later, leaves have developed (right).
10x microscope image of root tip with meristem 1 - quiescent center  2 - calyptrogen (live rootcap cells) 
3 - rootcap 
4 - sloughed off dead rootcap cells
5 - procambium

A meristem is the tissue in most plants containing undifferentiated cells (meristematic cells), found in zones of the plant where growth can take place.

Meristematic cells give rise to various organs of the plant and keep the plant growing. The shoot apical meristem (SAM) gives rise to organs like the leaves and flowers, while the root apical meristem (RAM) provides the meristematic cells for the future root growth. SAM and RAM cells divide rapidly and are considered indeterminate, in that they do not possess any defined end status. In that sense, the meristematic cells are frequently compared to the stem cells in animals, which have an analogous behavior and function.

近义、反义、联想词
近义词
n.
plant tissue

联想词
apical顶上的, 顶点的;bud芽,萌芽;elongation延伸;germination萌芽,发生;basal基础的;vegetative植物生长的;flowering开花的;apoptosis细胞死;ovary子房;photosynthesis光合作用;seedlings幼苗;
英英词典
meristem n.
  1. undifferentiated tissue from which new cells are formed, as at the tip of a stem or root
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更新时间:2025/6/20 16:47:33