查询词典 pollen tube

The results showed that: different concentrations of sucrose and boric acid had significant impact on pollen germination, but different concentrations of calcium had no significant impact on pollen germination. It was most appropriate for tube elongation when sugar 150 gL^(-1) and boric acid 100 gL^(-1). Lack of sucrose would lead to the accumulation of callose in top of pollen tube and hold back its growth. The distribution of callose was regular in pollen tube when the medium lacked boric.

结果表明：蔗糖、硼酸浓度间对花粉萌发有显著影响，钙浓度间对花粉萌发的促进作用不明显；蔗糖150 gL^(-1)、硼酸100 mgL^(-1)时最适宜花粉管伸长；蔗糖的缺乏会导致胼胝质在花粉管顶端积累，使其生长停滞，缺硼时胼胝质在花粉管内分布正常。

The conversion boundary of self-incompatibility was researched by sowing by stage. Sunshine of day and temperature was studied critically by investigating leafage and researching traits indoors. The results showed that the daily minimum temperature was the principal factor of affinity conversion and the affinity conversion boundary was 16.5~18.1℃.HE97 was primarily regard as self-incompatible line in this research. The method was by inbreeding and sib HE97, Half the silk of HE97 and Zheng58. Inbreeding and cross have been done simultaneously. The extending condition of pollen tube was observed by dying the silk after pollinating 4 hours. The individuals with pollen tube were observed having seeds, while the individuals without pollen tube were observed having few seeds or no seeds. So this study regard HE97 as sporophytic self-incompatibility .The planting ration of female parent HE97 and male parent 87-1 was 4:1.The nature cross-pollination was studied by the theory of endosperm xenity, the study show that the setting percentage of HE97 was 625%, in which the seed in self was 70% and the seed in hybrid was 30%. This was consistent with the study of silk anatomy structure, then come to the same conclusion: compatible pollen germination and fertilization can stimulate the self-incompatible pollen germination and fertilization in the same corn cob.

通过分期播种，进行了光温敏自交不亲和材料HE97亲和性转换区间的研究，依据田间跟踪调查叶龄及室内考种研究了HE97亲和性转换区间的光温临界值，结果表明：1日最低温度是影响HE97自交不亲和性的主要原因，亲和性转换区间在16.5℃～18.1℃之间。2通过HE97自交和姊妹交以及将HE97与郑58作为双亲，各自的花丝一分为二，分别正反交，授粉后4个小时分别取其花丝进行固定、染色，观察花粉管的伸长情况，根据结实率与花粉管伸长的对应关系，结果发现观察到花粉管的对应植株收获到了种子，而没有观察到花粉管的对应植株结实率极低或没有结实，本研究把HE97初步划为孢子体自交不亲和类型。3以HE97为母本，87-1为父本，按4母：1父行比，通过花粉直感效应研究天然异交率，结果母本HE97结实良好(62%)，其中自交粒占70%，异交粒占30%，结合花丝切片观察表明，亲和花粉的萌发及受精会导致落在同一果穗柱头上不亲和花粉的萌发不再受抑制。

The results showed that the four treatments of cytochrome c supplemented with ATP all suppressed the pollen germination and pollen tube growth, and induced nuclear DNA degradation, different treatments with different ratios of double nuclei, single nucleus, and no nuclei. Treatment with heavy concentration of ATP also restrained pollen germination and pollen tube growth, but can not induced nuclear DNA degration.

结果表明，细胞色素c和ATP混合处理的四个组合都能抑制离体花粉萌发和花粉管生长，并且引起了花粉管核DNA的降解，不同处理中双核、单核及无核花粉管所占比率存在明显差异；高浓度ATP虽能抑制花粉萌发和花粉管生长，但不能引起花粉管核DNA的降解。

During the fertilization of angiosperms, the degenerated synergid induces a pollen tube to enter and break the pollen tube to release two sperm cells, which fuse with the egg and central cell.

在受精过程中，助细胞吸引花粉管向雌配子体生长，并接受花粉管长入细胞程序死亡助细胞中。接下来的花粉管停止生长和花粉管顶端破裂释放出2个精细胞的过程可能也依赖于助细胞。

It takes about 0.5 h for a pollen tube from germination to arrive at the micropyle. About 0.5 h after pollination, the pollen tube releases two sperms into one synergid. At 0.5-2.5 h after pollination, the egg cell fuses with one sperm to form a zygote. About 10.0 h after pollination, the division of the zygote begins. The duration of the zygote lasts about 2.5-10.0 h. However, one sperm nucleus fuses with two polar nuclei at 1.0-3.0 h after pollination, and 5.0 h after pollination the primary endosperm nucleus begins to divide.

水稻受精过程经历的时间表如下：授粉后，花粉在柱头萌发；花粉萌发至花粉管进入珠孔大约需要0.5小时；授粉后0.5小时左右，花粉管进入一个助细胞，释放精子；授粉后0.5-2.5小时，精卵融合形成合子；授粉后约10.0小时，合子第1次分裂，合子期为授粉后2.5-10.0小时；授粉后1.0-3.0小时，精核与两极核融合；授粉后约5.0小时，初生胚乳核分裂。

The pollen tube enters the female gametophyte from micropylar end and the free nuclei near pollen tube have the average chance to acting as the functional egg.

花粉管从雌配子体的珠孔端进入，珠孔端的游离核行使卵细胞功能的机会是均等的。

The degradation of pollen tube RNA in vitro by stylar S-RNase at different temperatures was performed to detect the extent of degradation using the agarose gel electrophoresis. The germination and tube growth of self-pollen and the RNA of self-pollen tube were inhibited and degraded significantly greater than cross-pollen respectively at 10℃ and 25℃, but no significant difference when the temperature rose to 35℃.

10℃、25℃时，花柱S-RNase抑制自花花粉萌发和花粉管生长的程度极显著大于抑制异花花粉的程度；花柱S-RNase降解自花花粉管RNA的程度也明显大于降解异花花粉管RNA的程度；温度升高到35℃时，自花和异花间花粉萌发和花粉管生长被花柱S-RNase抑制的程度不存在显著性差异；花柱S-RNase降解自花和异花花粉管RNA的程度也相似。

Effects of arabinogalactan proteins in pollen germination and pollen tube growth of Torenia fourieri and Nicotiana tabacum were studied with the in vitro pollen tube growth system.

采用花粉离体培养技术研究了阿拉伯半乳糖蛋白(arabinogalactan proteins， AGPs)在烟草和蓝猪耳花粉萌发及花粉管生长中的作用。

With the aid of aniline blue staining, pollen tube growth in pistil tissue was observed in Arabidopsis thaliana, and the growth speed of pollen tubes in style and ovary were calculated, the results showed that the pollen tube grew faster as time goes on.

以模式植物拟南芥为供试材料，利用脱色苯胺蓝染色的方法观察了拟南芥花粉管在雌蕊组织中的生长情况，获得了花粉管从萌发到进入花柱和子房不同时期的生长速率，结果表明，花粉管在不同时期的生长速率呈现出逐步加快的趋势。

The pollen living ability declined with time prolonging and the best condition for pollination was 22~28℃and fresh pollen appearing .By means of benzidine- hydrogen peroxide reaction and aniline blue fluorescence method, showed that the stigma receptivity could teach to 12 days since flowering. Compared with self pollination, the pollen was easily adhered into sigma and the pollen tube was easily entered into style in cross pollination experiment.

通过联苯胺—过氧化氢反应法和苯胺蓝荧光法观察了柱头的可授性、花粉在柱头的黏附、萌发及花粉管的生长情况，结果表明：非洲菊柱头发育初期就具有可授性，可授期达12d ；杂交和自交相比，杂交的花粉比较容易黏附、花粉管进入柱头比较容易，二者存在花粉黏附数量和花粉管进入数量的差异。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。