顶端分生组织

At the reproductive stage, RA68 was expressed in the inflorescence meristem, the tip of rachis branch, spikelet primordia, macrospore sac and pollen grains.

原位杂交分析结果表明：在幼苗期RA68主要在幼芽胚芽鞘的内外层细胞和幼叶原基的表层细胞中表达；转入生殖生长期后，在花序分生组织、枝梗原基顶端、花器官原基、大孢子囊和花粉粒中表达。

Quiescent center A group of cells in the center of the apical meristem in which mitotic divisions are rate or absent.

静止中心：在根的顶端分生组织中心区域的一些细胞，它们几乎不进行有丝分裂。

The results showed this gene is overexpressed in genetic tumor and meristem tissues, suggesting that this gene is closely related to cell division and tumor formation in plant.

Northern杂交结果表明，此周期蛋白基因在遗传瘤及顶端分生组织中高表达，说明这个基因与遗传瘤的形成及细胞分裂联系密切。

The most critical events appeared to be the establishment of apical-basal patterns of symmetry,formation of apical meristems,and differentiation and axial change of procambium during the development of cotton somatic embryos.

棉花体细胞胚发育过程中最关键的事件似乎是极性的建立、顶端分生组织的形成以及前形成层的分化和生长轴变化。

There is primary thickening meristem at the lower part of rhizome tip under protoderm.

根状茎顶端的原分生组织由鳞片包被，顶端下方的原表皮内存在初生增厚分生组织。

Cauliflower curd is composed structurally of a number of the shortened branchy shoots on which there are tremendous amount of naked apical meristems.

这些器官是在个体发育中，由于茎顶端分生组织发育方向的改变而分化出的不同变态器官。

When pea ( Pisum sativum L.,Alaska strain) was grown in short\|day conditions,the apical bud senescence started with the transformation of the bud from vegetative to reproductive growth.DNA fragmentation was detected during the senescence using the terminal deoxynucleotidyl transferase\|mediated dUTP nick end in situ labeling method.The cell ultrastructural changes were similar to apoptosis in animal cells:the apical meristemetic cells underwent the programmed cell death.This wa...

显微、超微结构研究表明，短日照条件下豌豆顶芽的衰老过程是从营养生长锥向花芽的转化，而用DNA原位末端标记、Caspase 8WesternBlot和 14 0bpDNA片断积累的试验结果证明，转化为花芽的整个生长锥细胞发生了编程性死亡，而且其最顶端部分细胞首先发生PCD ，而顶端周围的分生组织细胞逐渐分化出花芽的各部分，但顶芽最后并没有发育成为完整的花，所有细胞就都发生PCD ，从而顶芽衰老

The apical shoot and apical root primordia of the embryo.

该名词也用于指随后进一步发育的顶端分生组织。

The apical meristems in the lower plants consist of one cell only, as in the ferns, but become more complex and eonsist of groups of cells in the higher plants.

在低等植物中顶端分生组织由一个细胞构成，例如蕨类植物。在高等植物中由复杂的多数组细胞构成。

It also contains additional supporting tissue in the form of fibers and sclereids and some living parenchyma.

原生木质部和后生木质部组成初生木质部，是由顶端分生组织的原形成层发育而来。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。