根细胞

Finally, cell wall degraded and aggregated together, which results in gas spaces formation in a radial direction.3. Aerenchyma formation appeared to be a form of nonapoptotic programmed cell death in the middle of root cortex.

3稻根内通气组织形成的实质很可能是位于内皮层和外皮层之间的皮层细胞发生非凋亡的程序化细胞死亡形成的。

Under 100mmol/L NaCl stress,ailanthuscompartmentalized Na+ in vacuole,while under 200mmol/L treatment,the Na+ content incytoplasm was higher than vacuole.the ailanthus cells took up large amount of Cl- and didnot concentrate Cl- in vacuole.

在根和叶细胞中Na+通过液泡膜的转移和细胞K+含量稳定性的维持能力的不同是银杏和臭椿耐盐性差异的重要原因。

The micronucleus and abnormal division in Allium sativum root tips induced by polluted river water were investigated.

研究污染的河水对大蒜根尖细胞微核的诱导及细胞分裂的效应。

The Cork was consisted of five or six layer long cells. The secondary phloem occupied 46% of the diameter of root, and the parenchymas cell was abundant of the inclusions. The secondary xylem consisted of vessel, xylary radial ,and a little of xylary parenchyma cells. Some segment of hypha, swelled hypha, pelotons and conidiophore were colonied in cork and secondary phloem.

周皮由木栓层，木栓形成层和栓内层组成，其中木栓层由5～6 列长形细胞组成；维管组织中次生韧皮部所占根径的比例达46%，其薄壁细胞中内含物较丰富，次生木质部中分布有导管和木射线及少量木薄壁组织；在格木木栓层和次生韧皮部中分布有菌丝片段、膨大的菌丝和菌丝团及分生孢子。

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。

Immunocytochemical studies showed that the transduced muORs were expressed in all types of DRG neurons.

免疫细胞化学研究表明转导的 muORs在背根神经节神经元的各种类型的细胞中都能表达。

The intercellular spaces of parenchyma cells close to exodermis and endodermis were smaller, but that in the cortex were larger.

土培根中靠近外皮层和内皮层的薄壁细胞的胞间隙小，皮层薄壁细胞的胞间隙较大。

The results indicated that the treatment of irradiation restrained the growth and differentiation of protocorm, especially to roots.The LD50 is 67.23Gy, because the protocorm is a integrate embryoids and higher tolerance was found. Ploidy analysis showed that most of aberrant seedlings go with the change of DNA and they were not euploid. When the plants trearted by irradiation, some of aberrant seedlings appeared stem forfication, and leaves appeared chlorophyll-deficient or green-white.,probably due to some genes' expression or closing.

结果表明：辐照处理对种胚原球茎的生长和分化有抑制作用，尤其是对根的抑制更为明显；由于种胚原球茎的完整性好，耐受性强，其辐照半致死剂量(LD50)为67.23Gy；流式细胞分析表明，大多数外部形态发生改变的植株其细胞内DNA的倍性发生了改变，出现相当多的非整倍体；此外，辐照产生的变异苗出现茎分叉、叶片缺绿或白绿相间等现象，可能是由于某些基因的表达与关闭引起的。

ROL barriers on the edge of the exodermis plays great role in root morphogenesis, material transport and stress adaption. The lowland rice (Yangdao 6) and upland rice(Zhonghan 3) were tested by comparing the morphologic differences of ROL barrier under water stress of different consistency PEG solutions.

6通过PEG模拟水分胁迫比较水稻(扬稻6号)和旱稻(中旱3号)根内外皮层边缘厚壁细胞的形态差异，从而揭示这一层次细胞加厚的规律。

The acquisition of friable calli and the establishment of the cell suspension cultures of tobacco NC89 leaf were studied.

研究表明细胞分裂素与生长素浓度的比值高时，有利于芽的分化，相反细胞分裂素与生长素浓度的比值低时，有利于根的分化。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。