查询词典 pollen

These pollen maps show significant vegetation changes during the past 10 000 years in the current forest regions of Northeast China, with the early Holocene characterized by the widely distributed Birch, the mid-Holocene by the development of temperate deciduous forest mainly consisting of Quercus and Ulmus, and the late Holocene by the marked increase in Pinus abun dance and the development of temperate mixed conifer and deciduous forest.

花粉图展示了东北地区植被演化的主要特征。桦树在全新世初期遍布从三江平原到辽东半岛南端的东北东部地区，在森林中占据绝对优势地位；榆属和栎属等阔叶乔木在早中全新世的大部分时间内是东部森林中的主要种类；在大约5kaBP以后，松属在东北现在的森林地区开始增加，云、冷杉属也表现出较明显扩大，中北部地区的森林覆盖度可能比原来增大了。

Pollen morphology of Umbelliferae in China and its evolution.

标题 中国伞形科花粉形态及其早期演化。

Pollen morphology of Umbelliferae in China and its evolution.

Title 中国伞形科花粉形态及其早期演化。

The genus Uncaria is fairly stenopalynous, because of a lack of variation of pollen characteristics at species level.

钩藤属植物的花粉形态特征是茜草科中较为原始的类型。

Pollen morphology of nine Chinese species of Uncaria Schreb.

利用光学显微镜和扫描电镜对中国钩藤属Uncaria Schreb。

Pollen Morphology of Nine Chinese Species of Uncaria Schreb.

匡延凤，廖景平。中国钩藤属9种植物的花粉形态。

In parts of 5-FC-treated transgenic lines, the pollen staining rate by I2-KI was much lower than that of untransformed control.

碘-碘化钾花粉活力检测显示，部分5-FC处理转基因植株的花粉活力与对照相比显著降低。

The effects of temperatures and treatments with Na_2B_4O_7,MnSO_4,CoCl_3,sugar and GA_3 on germination and tube growth of pollen in Vaccinium ashei were studied.

以5个兔眼越橘品种的花粉为试材，研究了温度、硼砂、硫酸锰、氯化钴、蔗糖和GA3等化学和物理因素对花粉萌发及花粉管生长的影响。

The situation of abnormal development of male cells is as follows:microspore mother cell can't enter into meiosis because of intense vacuolation,shrink and disintegration of its cytoplasm;although vacuolated microspore mother cell can enter into meiosis,it can't form normal dyad and degenerate in the middle process;dyad and tetrad become vacuolated and can't develop normally;cytoplasm of microspore shrinks around the nucleus at the stage of central nucleus microspore,the shape of microspore is twisted into crescent or irregular shape,at last its cytoplasm and nucleus are disintegrated and crescent vacant microspore presents;nutritive substances can't be accumulated at the stage of vacuolated microspore,cytoplasm is disintegrated,and microspore turns into a big vacant pollen.

雄性细胞异常发育有几种情况：小孢子母细胞强烈液泡化，细胞质收缩解体，不能进入减数分裂；小孢子母细胞液泡化，虽能进入减数分裂，但不能形成正常二分体而中途退化；二分体、四分体细胞液泡化，不能进行正常发育；单核小孢子中央期，细胞质收缩包围核，小孢子形状扭曲呈月牙形或不规则形，最终细胞质和核解体而呈月牙形的空壳小孢子；单核液泡期的小孢子不能积聚营养物质，细胞质解体而成为大的空壳花粉粒。

According to the results of sporo-pollen analysis of Diaojiaohaizi and Bojianghaizi sections, vegetational evolution series in time and space since 11kaB.

根据调角海子剖面及泊江海子剖面孢粉分析的结果，建立了北方农牧交错带11Ka B.P。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。