haustorium

简明释义

英[hɔːˈstɔːrɪəm]美[hɔsˈtorɪəm]

n. （寄生植物的）吸根

复 数 h a u s t o r i a

英英释义

单词用法

同义词

反义词

例句

1.During formation of the dikaryotic haustorium there were collars formed around the neckand tubles in cytoplasm in host cell.

在双核吸器形成过程中，寄主细胞可分泌胼胝质和产生与侵染有关的管状结构。

2.Endosperm formation is nuclear type and the endosperm forms chalazal haustorium.

核型胚乳，合点端具胚乳吸器。

3.The primary chalazal haustorium ramifies around the vascular tissues of the ovule.

初生合点吸器沿着胚珠的维管组织分支。

4.The haustorium cellularizated from the micropylar end to chalazal end at the later globular stage.

球形胚晚期吸器自珠孔端向合点端逐渐细胞化。

5.Early necrosis or post haustorium formation necrosis of haustoria might take place.

吸器可以在发育早期受抑坏死，也可迟滞至吸器体形成之后坏死。

6.During formation of the dikaryotic haustorium there were collars formed around the neckand tubles in cytoplasm in host cell.

在双核吸器形成过程中，寄主细胞可分泌胼胝质和产生与侵染有关的管状结构。

7.Perhaps they played the function as chalazal end of the haustorium.

作者认为它们是起了合点端吸器的功能。

8.Both hypha and haustorial mother cell were dikaryotic while the typical mature haustorium was mono- karyotic.

胞间菌丝和吸器母细胞均含有双核，而成熟吸器则含有单核。

9.The efficiency of nutrient uptake is greatly enhanced by the haustorium 吸收根 structure.

通过haustorium 吸收根结构，养分吸收的效率大大提高。

10.The plant's haustorium 吸收根 allows it to extract nutrients from the host plant.

这株植物的haustorium 吸收根使其能够从寄主植物中提取养分。

11.The haustorium 吸收根 forms a connection with the vascular system of the host.

该haustorium 吸收根与寄主的维管系统形成连接。

12.In parasitic plants, the haustorium 吸收根 is crucial for their survival.

在寄生植物中，haustorium 吸收根对它们的生存至关重要。

13.Some fungi develop a haustorium 吸收根 to penetrate plant tissues.

一些真菌发育出haustorium 吸收根以渗透植物组织。

作文

In the fascinating world of botany, the term haustorium refers to a specialized structure that certain parasitic plants develop to extract nutrients from their host plants. These structures are critical for the survival of parasites, as they provide a means to tap into the host's vascular system, allowing the parasite to draw water and essential nutrients. The concept of haustorium is particularly significant when studying plant interactions, especially in ecosystems where competition for resources is fierce.One of the most well-known examples of plants with haustoria is the genus Cuscuta, commonly known as dodder. Dodder is a twining, leafless vine that wraps around its host plants, forming haustoria that penetrate the host's tissues. This allows dodder to siphon off vital nutrients, often leading to the decline or even death of the host plant. The relationship between dodder and its host is a stark reminder of the complexities of plant interactions in nature.The formation of a haustorium involves intricate physiological processes. When a parasitic seed germinates, it produces a specialized structure that grows towards the host plant. Once contact is made, the haustorium develops and begins to invade the host’s tissues. This process not only highlights the adaptability of parasitic plants but also raises questions about the evolutionary strategies employed by both parasites and their hosts. For instance, many host plants have evolved defensive mechanisms to thwart parasitic invasions, such as producing chemical compounds that deter the growth of haustoria.Understanding haustoria is essential for researchers studying plant ecology and evolution. It sheds light on the dynamics of parasitism and the evolutionary arms race between parasites and their hosts. This knowledge can also inform agricultural practices, especially in managing parasitic plants that threaten crops. For example, controlling dodder infestations is crucial for maintaining healthy crop yields, as these parasites can severely impact agricultural productivity.Furthermore, the study of haustoria extends beyond just understanding parasitic plants; it also provides insights into symbiotic relationships in nature. Some plants form mutualistic associations with fungi, creating structures reminiscent of haustoria to exchange nutrients. This highlights the dual nature of plant interactions, where relationships can be both parasitic and beneficial, depending on the context.In conclusion, the term haustorium encapsulates a fascinating aspect of plant biology that illustrates the complexity of life forms and their interactions. From the way dodder invades its host to the broader implications for ecology and agriculture, haustoria serve as a reminder of the intricate web of relationships that sustain ecosystems. As we continue to explore these connections, we gain a deeper appreciation for the resilience and adaptability of life on our planet. The study of haustoria not only enhances our understanding of parasitism but also encourages us to consider the delicate balance of nature, where every organism plays a role in the grand tapestry of life.

在植物学的迷人世界中，术语haustorium指的是某些寄生植物发展出的专门结构，用于从宿主植物中提取养分。这些结构对于寄生虫的生存至关重要，因为它们提供了一种接入宿主血管系统的方式，使寄生虫能够抽取水分和必需营养物质。haustorium的概念在研究植物相互作用时尤为重要，尤其是在资源竞争激烈的生态系统中。众所周知的具有haustoria的植物之一是Cuscuta属，通常被称为鬼针草。鬼针草是一种缠绕的无叶藤本植物，它缠绕在宿主植物上，形成穿透宿主组织的haustoria。这使得鬼针草能够汲取重要的营养物质，往往导致宿主植物的衰退甚至死亡。鬼针草与宿主之间的关系鲜明地提醒我们自然界植物相互作用的复杂性。haustorium的形成涉及复杂的生理过程。当寄生种子发芽时，它会产生一种专门的结构，朝向宿主植物生长。一旦接触到宿主，haustorium就会发展并开始侵入宿主的组织。这个过程不仅突显了寄生植物的适应能力，也引发了关于寄生虫和宿主之间演化策略的问题。例如，许多宿主植物已经进化出防御机制，以阻止寄生侵袭，例如产生化合物来抑制haustoria的生长。了解haustoria对研究植物生态学和进化至关重要。它揭示了寄生现象的动态及寄生虫与宿主之间的进化军备竞赛。这一知识也可以为农业实践提供指导，尤其是在管理威胁作物的寄生植物方面。例如，控制鬼针草的滋生对于维持健康的作物产量至关重要，因为这些寄生虫可能严重影响农业生产力。此外，haustoria的研究不仅限于理解寄生植物；它还提供了关于自然界共生关系的见解。一些植物与真菌形成互利的关联，创造出类似于haustoria的结构以交换营养。这突显了植物相互作用的双重性质，根据环境的不同，这些关系既可以是寄生的，也可以是有益的。总之，术语haustorium概括了植物生物学的一个迷人方面，展示了生命形式及其相互作用的复杂性。从鬼针草如何侵入宿主的方式到对生态和农业的广泛影响，haustoria提醒我们维持生态系统的复杂关系。随着我们继续探索这些联系，我们对地球上生命的韧性和适应性有了更深刻的认识。对haustoria的研究不仅增强了我们对寄生现象的理解，还促使我们考虑自然的微妙平衡，在这个平衡中，每个生物体都在生命的宏伟织锦中扮演着角色。