查询词典 pollen tube

In a compatible pollination, pollen germinates to extrude a tube that penetrates the stigma and grows extracellularly through the stylar tissues to ovules.

当花粉通过自交不亲合的筛选后，萌发的花粉管会穿透柱头并沿著花柱朝胚珠生长。

Stamens 2(-4), inserted on corolla tube or hypogynous; anthers dehiscing longitudinally; pollen 3-colpate or 3-colporate.

雄蕊2(-4)，着生于花冠筒或；花药纵向开裂；花粉3沟或者3孔沟。

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。

In addition, Ca〓 ionophore A〓 impeded pollen germination and tube growth.

此外，Ca〓载离子体A〓亦抑制花粉萌发和花粉管生长，但与Verapamil和Co〓的效应不同，花粉管生长过程对A〓比花粉萌发敏感得多，表明花粉管中Ca〓极性分布对花粉管生长的重要性。

Flower buds cylindric-lanceolate, apex caudate-lanceolate; corona inserted at middle of corolla tube, lobes ovate or linear, apex obtuse; pollen in a single mass in each anther locule

花芽圆筒状披针形，披针形先端尾状；副花冠花冠筒，裂片卵形或线形的着生的在中部，先端钝；在每花药子房室里的花粉在一单的群众 2 Cryptolepis 白叶藤属

Floral tube 12-35 mm; sepals 5-25 mm; petals 5-25(-35) mm; stigma surrounded by anthers at anthesis; pollen ca. 50% fertile; flowers primarily self-pollinating

花被管12-35毫米；萼片5-25毫米；花瓣5-25(-35)毫米；花药在花期包围的柱头；约的花粉50%的可育；主要的花自花传粉 5

Pollen germination and tube growth were even stimulated by exogenous cAMP at very low concentration as 10 nmol/L.

这部分工作不仅表明cAMP很有可能作为花粉管萌发及生长调控的信使之一，而且为cAMP在植物组织中普遍存在提供了另一佐证。

In this paper, the requirement analysis, design and implementation of the system are introduced in detail.

此论文详细介绍了系统的需求分析，系统设计和具体实现。

In the context of economic globalization is increasingly deepening, China's economy can not be spared.

在经济全球化日益加深的背景下，中国经济不可能做到独善其身。