查询词典 microspore

Since microspore mother cells showabortion during the first meiotic divison,it is suggested thatthe early male abortion is frequently associated with variousdegrees of impairment to the fertility to the female〓amate.

研究的27个杂种第一代中，有11个组合的产量超过对照或与对照持平，占总组合数的40.74%。在强优势组合中，不育细胞质带来的负效应不足以使F1产量的显著降低，而且通过杂优补偿作用可比对照有所提高。

Above results suggest that the nuclear genes controlling amyloplast development may express in the uninuclear microspore and continue to be active in the VC, while the genes controlling plastid dedifferentiation may be promoted in the GC after the first mitotic division.

以上结果表明可能控制造粉质体的核基因在单核小孢子中表达并继续在营养细胞中起作用，而控制质体脱分化的基因在第一次有丝分裂后才在生殖细胞中被启动。

Were observed under scanning electron microscope. Also the microspore developmental sequence of different whorls of stamens in the same androecium was examined under the light microscope.

Payer［1］首次报道了在一些类群中，雄蕊群的发育并非都是向心或向顶的发育顺序，而是离心发育的。

The results showed that: Base on the observation results of paraffin slice up, the progress of male and female flower development can be divided into five stages, including: fist, flower primordium, namely asexuality stage; second, hermaphroditic stage; third, single flower at early stage; fourth, widen of stamen primordial and enlarge of pistil primordial; fifth, microspore stage of male flower and grown up of female flower.

试验结果表明：据石蜡切片的观察结果，把苦瓜雌、雄花的发育进程分为5个时期：第一个时期为花原基期即无性期，第二个时期为两性期，第三个时期为单性花初成期，第四个时期雄花为雄蕊原基膨大期、雌花为子房膨大期，第五个时期雄花为花粉粒形成期、雌花为完全成熟。

It was found that callose appears in microsporangium at the microspore mother cell formation stage.

结果发现，胼胝质最早于小孢子母细胞形成期出现于花粉囊中。

The abnormality of tetrad callose wall degradation and tapetum development was associated with the abortion of microspore.

导致小孢子败育的原因与四分体胼胝质壁不适时解体和绒毡层细胞发育异常、延迟解体有关。

Staining with the improved carbol fuchsin-aniline blue fluorescence method is a convenient and efficient way to observe the behavior of the callose wall of microspore mother cells during meiosis.

利用改良苯酚品红－苯胺蓝压片法，观察小孢子母细胞减数分裂过程中胼胝质的动态变化。

The cytokinesis of microspore mother cell during meiosis is of simultaneaous type.

小孢子在四分体中的排列方式属四面体型。

Thress homologous chromosomes of trisomics associated as a trivalent or a bivalent and a univalent or three univalent during diakinesis and metaphase 1 ;Laggard chromosome and univalent separated in advance at anaphase I ,leading to distribution of 10-1-10,9-12,11-11,10-2-10,10-12,10-10,9-1-11 besides 10-ll;And there was distribution of 11-11-10-10, 10-10-10-12, 10-10-10-11, 10-11-11-11, 11-11-10-9, 10-10-10-10, 9-12-10-10, 9-9-11-11, 11-10-10-9, 12-10-9-11, 11-9-9-13, 10-10-10-9 at anaphase II ;n l microspore frequency were different of four trisomics.

三体在终变期和中期Ⅰ，3个同源染色体联会成三价体，或2个联会成二价体和1个单价体，或3个都为单价体；后期Ⅰ出现落后染色体或单价体提前分离，导致除10-11式分离外，还有10-1-10，9-12，11-11，10-2-10，10-12，10-10，9-1-11等不均衡分离方式；后期Ⅱ有11-11-10-10，10-10-10-12，10-10-10-11，10-11-11-11，11-11-10-9，10-10-10-10，9-12-10-10，9-9-11-11，11-10-10-9，12-10-9-11，11-9-9-13，10-10-10-9等分离方式；4个三体中的n 1小孢子频率不同。

Subsequently, the tapetum cell began to disorganize, and it kept the strongest Ca^2＋ fluorescence intensity from microspore to pollen maturity until the tapetum was disappeared completely.

在花药壁组织内Ca^2＋分布也呈现规律性的变化：造孢组织时期，花药壁组织Ca^2＋荧光强度在不同壁层组织中分布均匀；小孢子母细胞时期，药壁中层细胞Ca^2＋荧光最强，绒毡层细胞次之；单核小孢子时期，绒毡层细胞呈解体状态，Ca^2＋荧光最强，并保持到二核花粉时期直至绒毡层完全消失，但此时花药纤维层发育形成，表现出较强的Ca^2＋荧光。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。