总机电话:010-64522026   编辑部:010-62178764   邮发代码:82-418   刊号:ISSN1671-4350   定价:16.00

[点击科学]2023年04月点击科学

陶 陶 编译

2023-04/总第325期

阅读数2

6635.jpg

2023-03-03

封面图展示的是原产于格鲁吉亚卡赫蒂地区的“萨别拉维”红葡萄品种。世界各地丰富多样的葡萄品种,揭开了人类农业历史的神秘面纱。一项基因组调查揭示了这种重要藤本植物的两个并行的驯化起源,还展示了西亚鲜食葡萄是如何沿着人类迁徙的轨迹演变成麝香葡萄和独特的西方酿酒葡萄的。

The substantial grapevine diversity in the world, showcased here by the vigorous ‘Saperavi’ variety in the Kakheti region of Georgia, reveals secrets about human agricultural history. A genomic survey uncovers two concurrent domestication origins of this essential vine. It also shows how Western Asian table grapes diversified along human migration trails into muscat and unique western wine grapes.

6636.jpg

2023-03-10

封面图展示的是一只蜜蜂正在表演一种复杂的舞蹈以传达资源的位置与价值信息。现在的研究表明,如果它们之前能够跟随更有经验的舞者学习社交,那么新手蜜蜂就能跳得更好,并且更加准确地传达位置信息。随着时间的推移,它们对方向的沟通能力会提高,但它们准确沟通距离的能力却并没有提高。

A honey bee (Apis mellifera) performs a complex dance to communicate resource location and value. Research now shows that novice bees dance better and communicate location more accurately if they were previously able to follow and socially learn from more experienced dancers. Their communication of direction improves over time, but their ability to accurately communicate distance does not.

6637.jpg

2023-03-17

封面图展示的是在法国阿尔卑斯山上,一只高山欧螈正在走向一个池塘准备开始繁殖。许多两栖动物都具有一个非常隐蔽的上半身,以及一个在通常情况下隐藏起来的、非常显眼的下半身。这些隐藏信号的进化有几个原因,包括对潜在捕食者的警告。系统发育分析表明,这种具有隐藏颜色的物种,在具有永久显示警告信号的物种进化过程中,代表了非常重要的中间步骤。

An alpine newt (Ichthyosaura alpestris) walks to a breeding pond in the Alps, France. Many amphibians have a cryptic upper side but a normally concealed, conspicuous underside. These hidden signals have evolved for several reasons, including as a warning display to would-be predators. A phylogenetic analysis reveals that species with hidden colors represent an important intermediate step in the evolution of species with permanently displayed warning signals.

6638.jpg

2023-03-24

封面图展示的是一张彩色增强扫描电子显微图像,显示了通过化学气相沉积生长出来的Ti2CCl2 MXenes化合物。这种材料的二维层垂直于基底生长,然后折叠成微球形结构。二维MXene板片间的离子插层具有储能和其他应用的潜力。

This color-enhanced scanning electron microscopy image shows Ti2CCl2 MXenes grown by chemical vapor deposition. The two-dimensional layers of this material grew perpendicular to the substrate and then folded into microspherical structures. Ion intercalation between two-dimensional MXene sheets has potential for energy storage and other applications.

以下平台可使用同一账号密码登录,点击开始同步密码

确认