stoma

简明释义

英[ˈstəʊmə]美[ˈstoʊmə]

n. [植] 气孔；叶孔；[昆] 呼吸孔

复 数 s t o m a s 或 s t o m a t a

英英释义

单词用法

同义词

反义词

例句

1.Kochia scoparia differed from the substitutes in utride, trichome and stoma under SEM.

扫描电镜下地肤与其他药材的胞果、毛茸和气孔的形态特征有区别。

2.They should also be constantly concerned in taking care and cleaning their stoma .

他们还应该不断关注，在照顾和清洁他们的气孔。

3.The key of this operation is to isolate the local adhesion and free the stenotic stoma.

该手术关键在于分离局部粘连、游离狭窄的吻合口。

4.Observe stoma site for bleeding, crust, irritation, and broken skin.

观察出口有无出血，结痂，发炎及破皮。

5.Typical stoma clusters were existed on the lower epidermis of the middle part of grape leaves.

叶片中部下表皮存在典型的由气孔及其周围体形较小的气孔形成的气孔群。

6.There was no stoma bleeding or stenosis.

无出血及吻合口狭窄。

7.Traits: Garnet red, tiny tannin, bitter and stoma, it's full of fragrance of the mature fruit and wildness fruit.

品鉴：呈石榴红色，单宁轻微，微苦可口，充满成熟水果和野生果的芬芳。

8.The stoma density of diploid is thicker than spur type.

二倍体气孔密度大于三倍体，普通型大于短枝型。

9.The nurse explained the importance of keeping the stoma area clean and dry.

护士解释了保持造口区域清洁和干燥的重要性。

10.A well-fitted pouch can help manage the output from the stoma effectively.

合适的袋子可以有效管理来自造口的排泄物。

11.Patients with a stoma often require special dietary adjustments.

有造口的患者通常需要特殊的饮食调整。

12.After the surgery, the patient was instructed on how to care for their stoma.

手术后，患者被指导如何护理他们的造口。

13.Many people with a stoma lead active and fulfilling lives.

许多有造口的人过着积极而充实的生活。

作文

In the field of biology, the term stoma refers to a small opening or pore found on the surface of leaves and stems of plants. These openings are crucial for the process of photosynthesis, as they allow carbon dioxide from the atmosphere to enter the plant while facilitating the release of oxygen. The stoma is surrounded by a pair of specialized cells known as guard cells, which regulate its opening and closing based on various environmental factors such as light, humidity, and carbon dioxide concentration. This dynamic process plays a vital role in maintaining the plant's water balance and overall health.Understanding the function of the stoma is essential for grasping how plants interact with their environment. During the day, when sunlight is abundant, the guard cells swell with water, causing the stoma to open. This allows for maximum gas exchange, enabling the plant to absorb carbon dioxide necessary for photosynthesis. However, at night or during dry conditions, the guard cells lose water, causing the stoma to close. This closure helps to conserve water and prevent dehydration, demonstrating the plant's remarkable ability to adapt to changing conditions.The significance of the stoma extends beyond individual plants; it has implications for entire ecosystems and agriculture. For instance, in agricultural practices, understanding how stoma function can lead to better crop management strategies. Farmers can optimize irrigation and fertilizer use by knowing when plants are actively taking in carbon dioxide and releasing oxygen, thus maximizing yield while minimizing resource waste.Moreover, research into stoma behavior has increased in light of climate change. As global temperatures rise and precipitation patterns shift, plants must adapt their gas exchange processes to survive. Scientists are studying how different species of plants adjust their stoma activity in response to stressors such as drought or elevated carbon dioxide levels. This research is critical for developing resilient crops that can thrive in changing climates, ensuring food security for future generations.In conclusion, the stoma is not just a simple opening; it is a vital component of plant physiology that plays a significant role in the survival and adaptability of plants. Its regulation by guard cells demonstrates the intricate balance plants maintain with their environment. By studying the stoma, we gain valuable insights into plant health, ecosystem dynamics, and agricultural practices, ultimately contributing to our understanding of the natural world and how to sustain it. The knowledge surrounding stoma is essential for anyone interested in botany, ecology, or sustainable agriculture, as it highlights the interconnectedness of life and the importance of each component within an ecosystem.

在生物学领域，术语stoma指的是植物叶子和茎表面的小开口或孔。这些开口对于光合作用过程至关重要，因为它们允许大气中的二氧化碳进入植物，同时促进氧气的释放。stoma被一对特殊细胞称为保卫细胞包围，这些细胞根据光线、湿度和二氧化碳浓度等各种环境因素调节其开启和关闭。这一动态过程在维持植物的水分平衡和整体健康方面起着重要作用。理解stoma的功能对于掌握植物如何与环境互动至关重要。在白天，当阳光充足时，保卫细胞吸水膨胀，导致stoma打开。这允许最大程度的气体交换，使植物能够吸收光合作用所需的二氧化碳。然而，在夜间或干燥条件下，保卫细胞失去水分，导致stoma关闭。这一关闭有助于节约水分，防止脱水，展示了植物在变化条件下的出色适应能力。stoma的重要性不仅限于个别植物；它对整个生态系统和农业也有影响。例如，在农业实践中，理解stoma的功能可以导致更好的作物管理策略。农民可以通过了解植物何时积极吸收二氧化碳和释放氧气来优化灌溉和施肥，从而最大化产量，同时最小化资源浪费。此外，随着气候变化的加剧，研究stoma行为的工作也在增加。随着全球气温上升和降水模式变化，植物必须调整其气体交换过程以生存。科学家正在研究不同植物种类如何在干旱或二氧化碳浓度升高等压力下调整其stoma活动。这项研究对于开发能够在变化气候中茁壮成长的抗逆作物至关重要，确保未来几代人的粮食安全。总之，stoma不仅仅是一个简单的开口；它是植物生理学的一个重要组成部分，在植物的生存和适应性中发挥着重要作用。保卫细胞对其的调节展示了植物与环境之间保持的微妙平衡。通过研究stoma，我们获得了有关植物健康、生态系统动态和农业实践的宝贵见解，最终有助于我们理解自然世界及如何维持它。关于stoma的知识对于任何对植物学、生态学或可持续农业感兴趣的人来说都是必不可少的，因为它突显了生命的相互联系以及生态系统中每个组成部分的重要性。