synergid

简明释义

英[ˈsɪnədʒɪd]美[ˈsɪnərdʒɪd]

n. [植] 助细胞

英英释义

单词用法

同义词

反义词

例句

1.The persistent synergid may still have a synthetic function as its cell wall becomes thick and lipids occur.

因宿存助细胞壁变厚，细胞质内出现脂滴，宿存助细胞可能仍有合成功能。

2.Synergid cells Two haploid cells located near the egg cell at the micropylar end of the embryo sac in flowering plants.

存在于开花植物胚囊内，是位于珠孔端的卵细胞两侧的两个单倍体细胞。

3.There is no starch in the nucellus, integuments and the antipodal cells, the persistent synergid contains a large amount of starch.

珠心、珠被、反足细胞都不含淀粉。宿存助细胞具丰富的淀粉。

4.There is no starch in the nucellus, integuments and the antipodal cells, the persistent synergid contains a large amount of starch.

珠心、珠被、反足细胞都不含淀粉。宿存助细胞具丰富的淀粉。

5.The pollen tube entered into the embryo sac via one synergid.

花粉管经由一个助细胞进入胚囊；

6.Research has shown that the synergid 辅助细胞 can influence the success of fertilization.

研究表明，synergid 辅助细胞 可以影响授粉的成功率。

7.In flowering plants, the role of the synergid 辅助细胞 is crucial for guiding the pollen tube to the ovule.

在开花植物中，synergid 辅助细胞 的作用对引导花粉管到达胚珠至关重要。

8.The synergid 辅助细胞 cells help in the fertilization process by signaling the pollen tube.

这些 synergid 辅助细胞 通过信号传递来帮助授粉过程。

9.The presence of synergid 辅助细胞 is essential for the proper development of seeds.

存在 synergid 辅助细胞 对种子的正常发育是必不可少的。

10.During plant reproduction, the synergid 辅助细胞 play a supportive role in the ovule.

在植物繁殖过程中，synergid 辅助细胞 在胚珠中扮演着支持角色。

作文

In the fascinating world of botany, every component of a plant plays a crucial role in its overall function and reproduction. One such component, often overlooked, is the synergid. These specialized cells are located at the micropylar end of the ovule and serve a significant purpose in the fertilization process. Understanding the role of synergid cells can provide insights into the intricate mechanisms of plant reproduction and the evolution of flowering plants.The primary function of synergid cells is to assist in guiding the pollen tube towards the egg cell within the ovule. When a pollen grain lands on the stigma of a flower, it germinates and forms a pollen tube that grows down through the style toward the ovule. The synergid cells play a pivotal role in this journey by releasing chemical signals that attract the pollen tube. This attraction is not merely a passive process; it involves a series of complex interactions that ensure the successful delivery of sperm cells to the egg cell for fertilization.Moreover, synergid cells also help in the nourishment of the developing embryo after fertilization. They provide essential nutrients and support to the zygote as it begins to divide and develop into a new plant. This nurturing role is vital, as it ensures that the young plant has the resources needed to grow and thrive in its early stages of life.The evolutionary significance of synergid cells cannot be understated. As flowering plants evolved, the mechanisms of reproduction became more sophisticated. The presence of synergid cells is thought to have contributed to the success of angiosperms, allowing them to reproduce more efficiently than their gymnosperm counterparts. This efficiency likely played a role in the widespread dominance of flowering plants in various ecosystems around the world.In addition to their biological functions, synergid cells have also been a subject of interest in scientific research. Studies have shown that understanding the signaling pathways involved in the attraction of the pollen tube can lead to advances in agricultural practices. For instance, enhancing the fertilization success rate in crops could lead to increased yields and food security. Researchers are exploring ways to manipulate these signaling pathways to improve plant breeding techniques, making the study of synergid cells relevant not only to basic science but also to practical applications in agriculture.In conclusion, the synergid cells are a remarkable example of how even the smallest components of a biological system can have profound effects on the overall process of reproduction and development in plants. Their role in guiding pollen tubes and nourishing embryos highlights the complexity of plant reproductive strategies. As we continue to explore and understand these processes, the importance of synergid cells will undoubtedly become more apparent, shedding light on the intricate dance of life that occurs within every flower. By appreciating the significance of such specialized cells, we can gain a deeper understanding of the natural world and the evolutionary history of plants.

在植物学的迷人世界中，植物的每个组成部分在其整体功能和繁殖中都发挥着至关重要的作用。一个常被忽视的组成部分是synergid。这些特殊细胞位于胚珠的微孔端，在受精过程中起着重要作用。理解synergid细胞的作用可以提供对植物繁殖复杂机制和开花植物进化的洞察。synergid细胞的主要功能是帮助引导花粉管朝向胚珠中的卵细胞。当花粉粒落在花的柱头上时，它会萌发并形成一根花粉管，向下生长穿过花柱，直达胚珠。synergid细胞在这一过程中发挥着关键作用，通过释放化学信号吸引花粉管。这种吸引不仅仅是一个被动的过程；它涉及一系列复杂的相互作用，以确保精子细胞成功送达卵细胞进行受精。此外，synergid细胞还帮助滋养受精后的发育胚胎。它们为正在分裂并发育成新植物的合子提供必需的营养和支持。这种滋养作用至关重要，因为它确保幼苗在生命早期阶段拥有生长和繁荣所需的资源。synergid细胞的进化意义不容小觑。随着开花植物的进化，繁殖机制变得更加复杂。synergid细胞的存在被认为促进了被子植物的成功，使它们比裸子植物更有效地繁殖。这种效率可能在各种生态系统中开花植物的广泛主导地位中发挥了作用。除了生物功能外，synergid细胞也成为科学研究的兴趣对象。研究表明，理解花粉管吸引中的信号通路可以推动农业实践的发展。例如，提高作物的受精成功率可能导致产量增加和粮食安全。研究人员正在探索如何操控这些信号通路以改善植物育种技术，从而使对synergid细胞的研究不仅与基础科学相关，也与农业的实际应用相关。总之，synergid细胞是一个卓越的例子，展示了即使是生物系统中最小的组成部分也能对繁殖和植物发育的整体过程产生深远影响。它们在引导花粉管和滋养胚胎方面的作用突显了植物繁殖策略的复杂性。随着我们继续探索和理解这些过程，synergid细胞的重要性无疑会变得更加明显，揭示每朵花内部发生的生命复杂舞蹈。通过欣赏这些特殊细胞的重要性，我们可以更深入地理解自然世界及植物的进化历史。