相关实验视频
Updated: Jul 10, 2026
07:33
Agroinfiltration and PVX Agroinfection in Potato and Nicotiana benthamiana
Published on: January 3, 2014
植物遗传学:基因从寄生植物转移到宿主植物
Jeffrey P Mower1, Sasa Stefanović, Gregory J Young
1Department of Biology, Indiana University, Bloomington, Indiana 47405, USA.
Nature
|November 13, 2004
概括
植物寄生植物可以将他们的线粒体基因转移到宿主植物. 这种水平基因转移是通过直接的身体接触发生的,这是植物生物学中以前未知的机制.
科学领域:
- 植物生物学 植物生物学
- 遗传学 是一个遗传学.
- 进化生物学是进化的生物学.
背景情况:
- 横向基因转移 (HGT) 是各种生物体中已知的现象,但其在植物中的机制尚未完全理解.
- 植物中的线粒体基因通常是通过母体遗传的,这使得HGT与标准遗传模式有显著的偏差.
研究的目的:
- 研究在开花植物中水平基因转移 (HGT) 的机制.
- 为了确定寄生植物和它们的主体之间的HGT实例.
- 为植物寄生虫相互作用中HGT模式提供证据.
主要方法:
- 植物线粒体基因组的遗传学分析.
- 寄生虫和宿主植物物种的生物地理分析.
- 比较基因组学以确定转移的基因.
主要成果:
- 鉴定了从寄生虫开花植物到宿主开花植物的线粒体基因HGT的两个新病例.
- 遗传学和生物地理数据强烈表明,直接的身体接触促进了基因转移.
- 证实HGT可以在两个方向发生:寄生虫到宿主和宿主到寄生虫.
结论:
- 直接的身体接触是寄生虫和宿主开花植物之间水平基因转移的可行机制.
- 线粒体基因的HGT可以在植物寄生虫系统中以两种方向发生.
- 这些发现扩大了我们对植物王国基因流动和进化的理解.
相关概念视频
00:53Transgenic Organisms
Overview
01:59Plant Breeding and Biotechnology
Crop cultivation has a long history in human civilization, with records showing the cultivation of cereal plants beginning at around 8000 BC. This early plant breeding was developed primarily to provide a steady supply of food.
02:18Types of Genetic Transfer Between Organisms
Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
02:19Export of Mitochondrial and Chloroplast Genes
A eukaryotic cell can have up to three different types of genetic systems: nuclear, mitochondrial, and chloroplast. During evolution, organelles have exported many genes to the nucleus; this transfer is still ongoing in some plant species. Approximately 18% of the Arabidopsis thaliana nuclear genome is thought to be derived from the chloroplast’s cyanobacterial ancestor, and around 75% of the yeast genome derived from the mitochondria’s bacterial ancestor. This export has occurred irrespective...
02:50Transgenic Plants
Recombinant DNA technology called transgenesis is often used to add a foreign gene or remove a detrimental gene from an organism. Such genetically modified organisms are called transgenic organisms.
The first-ever transgenic plant was a tobacco plant developed in 1983 that showed resistance against the tobacco mosaic virus. Since then, many transgenic plants have been developed and commercialized for improving the agricultural, ornamental, and horticultural value of a crop plant. Transgenic...
The first-ever transgenic plant was a tobacco plant developed in 1983 that showed resistance against the tobacco mosaic virus. Since then, many transgenic plants have been developed and commercialized for improving the agricultural, ornamental, and horticultural value of a crop plant. Transgenic...
02:18Types of Genetic Transfer Between Organisms
Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.