testa

简明释义

英[ˈtestə]美[ˈtestə]

n. [植]外种皮；介壳，甲壳

n. （Testa）人名；（意、法）泰斯塔；（英、西、葡、塞舌）特斯塔

复 数 t e s t a e

英英释义

单词用法

同义词

反义词

例句

1.The result showed that under the SEM ornamentation of testa of species of the Juncaceae has 3types:longitudinal lined type;

结果表明：在扫描电镜下，本科植物种子表面纹饰有3种不同的类型，即网纹型、条状突起型和纵条纹型。

2.Results The results showed that there were obvious stone cells of testa characteristics, alkaline reaction, and different UV in the seeds of Datura stramonium L. var. tatula Turrey.

结果紫花曼陀罗子种皮石细胞特征明显，具生物碱的化学反应特性，并且两者紫外光谱差异大。

3.It is therefore suggested that the relatively high level of ABA in the pericarp and testa is the major cause of the achene dormancy.

因此，可以认为现代月季种子休眠的主要原因是果皮和种皮内含有较高水平的ABA。

4.Studies on the optimum extraction process of flavonoids in the testa of Ginkgo biloba L. ;

目的：建立分光光度法测定银杏外种皮多糖的方法。

5.Morphological observation showed that the process that Embryo Cells broke through the testa to protocorms, then complete plant had regularity.

通过形态学观察发现，山慈姑种胚从突破种皮到形成原始球茎，最终发育成为完整植株这一过程具有一定的规律性。

6.Testa says, for example, that his agency has had to put on hold a number of TV campaigns because his clients did not want to fall foul of the law.

泰斯塔认为，他的广告公司不得不暂停一些电视广告的投放，因为客户不想违反法律。

7.Results The results showed that there were obvious stone cells of testa characteristics, alkaline reaction, and different UV in the seeds of Datura stramonium L. var. tatula Turrey.

结果紫花曼陀罗子种皮石细胞特征明显，具生物碱的化学反应特性，并且两者紫外光谱差异大。

8.The vascular bundles in stereid layer or Parechymatous cell layer of lateral margin of its testa provide the testa development with water and nutrition.

合欢种皮侧缘厚壁(薄壁)细胞层中有维管束，它为种皮的发育提供水分与营养。

9.This review deals with the variation of testa luster as well as the mechanism of flavonoid biosynthesis in Arabidopsis thaliana .

在此，就拟南芥种皮的色泽变异及类黄酮生物合成机理作一介绍。

10.The thickness of the testa can affect how well a seed can absorb water.

在种子吸水能力方面，testa的厚度会影响效果。

11.The scientist examined the testa of the seed to understand its protective functions.

科学家检查了种子的testa以了解其保护功能。

12.Farmers often analyze the testa of crops to determine their health.

农民常常分析作物的testa以确定它们的健康状况。

13.The testa of the fruit helps in the dispersal of seeds by protecting them during transit.

水果的testa通过在运输过程中保护种子来帮助种子的传播。

14.In botany, the testa is crucial for seed dormancy and germination.

在植物学中，testa对种子的休眠和发芽至关重要。

作文

The term testa refers to the protective outer covering of seeds in botany. This structure plays a critical role in the development and survival of the seed, as it shields the embryo and the stored food from environmental stresses such as desiccation, pathogens, and physical damage. In many ways, the testa is analogous to the shell of an egg; it serves as a protective barrier while allowing the necessary conditions for germination to occur. Understanding the function of the testa is essential for botanists and agricultural scientists alike. For instance, different species have evolved various types of testa structures that reflect their specific environmental adaptations. Some seeds have thick, hard testa layers, which help them survive in arid climates by minimizing water loss. Others possess thinner, more permeable testa layers that facilitate faster germination when conditions are favorable. In agriculture, the knowledge of how the testa functions can inform practices related to seed selection and crop management. Farmers may choose seeds with particular testa characteristics based on the climate and soil conditions of their fields. For example, in regions prone to flooding, seeds with a buoyant testa might be favored as they can remain viable even when submerged in water.Moreover, the testa also plays a role in seed dispersal mechanisms. Some seeds have a testa that is designed to catch the wind, while others may have hooks or barbs that allow them to attach to animal fur. This diversity in testa adaptations illustrates the intricate relationship between plants and their environments. In recent years, researchers have begun to explore the genetic and molecular basis of testa formation. By studying the genes responsible for testa development, scientists hope to gain insights into how to improve seed resilience and enhance crop yields. This research could lead to the development of new varieties of crops that are better suited to withstand the challenges posed by climate change. In conclusion, the testa is not merely a protective covering; it is a crucial component of plant life that influences seed viability, germination, and dispersal. Understanding the various functions and adaptations of the testa can provide valuable insights for both scientific research and practical applications in agriculture. As we continue to face environmental challenges, the study of the testa may offer innovative solutions to secure food resources for future generations.

术语testa指的是植物学中种子的保护外层。这一结构在种子的发育和生存中发挥着关键作用，因为它保护胚胎和储存的食物免受干旱、病原体和物理损伤等环境压力。在许多方面，testa类似于鸡蛋的壳；它作为保护屏障，同时允许萌发所需的条件发生。了解testa的功能对植物学家和农业科学家来说至关重要。例如，不同物种已经进化出各种类型的testa结构，以反映它们特定的环境适应性。一些种子具有厚而坚硬的testa层，有助于它们在干旱气候中生存，从而最小化水分流失。其他种子则具有更薄、更具渗透性的testa层，可以在条件有利时促进更快的萌发。在农业中，了解testa的功能可以为种子选择和作物管理提供指导。农民可能会根据田地的气候和土壤条件选择具有特定testa特征的种子。例如，在易于洪水泛滥的地区，可能会青睐具有浮力的testa的种子，因为即使在水中浸泡，它们仍然可以保持活力。此外，testa还在种子传播机制中发挥作用。一些种子的testa设计用于迎风飞扬，而另一些则可能具有钩子或刺，可以附着在动物的毛发上。这种testa适应性的多样性说明了植物与其环境之间错综复杂的关系。近年来，研究人员开始探索testa形成的遗传和分子基础。通过研究负责testa发育的基因，科学家希望获得有关如何提高种子抗逆性和增强作物产量的见解。这项研究可能会导致开发出更适合应对气候变化挑战的新作物品种。总之，testa不仅仅是一个保护性覆盖物；它是植物生命的重要组成部分，影响种子的生存能力、萌发和传播。理解testa的各种功能和适应性可以为科学研究和农业实际应用提供宝贵的见解。随着我们继续面临环境挑战，对testa的研究可能为确保未来几代人的食品资源提供创新解决方案。