Plants, mycorrhizal fungi and endobacteria: a dialog among cells and genomes
Plants, mycorrhizal fungi and endobacteria: a dialog among cells and genomes
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DOI：
10.2307/1543562
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发表时间：
2003-04-01
影响因子：
1.6
通讯作者：
Bonfante, P
中科院分区：
文献类型：
--
作者：
Bonfante, P
本综述重点关注菌根，它是真菌与 90% 陆地植物根部之间的联系。这些是世界上最常见的共生体，涉及分布在所有真菌门的约 6000 种真菌和约 240,000 种植物，包括森林和农作物。由于受复杂分子信号调节的菌根共生和养分交换，植物改善了营养生长，而真菌则完成了其生命周期。分子和细胞分析表明，在定植过程中，两种真核生物的细胞组织被完全重塑。例如，在皮质细胞中，结构修饰涉及宿主和微生物。最近的研究表明，在丛枝菌根（AM）中，第三种共生体（一种生活在真菌内部的细菌）的存在增加了系统的复杂性。这种常驻基因组的存在使得共生伙伴之间分子对话的研究变得更加复杂。分子分析表明，该细菌具有参与获取矿物质营养素的基因。实验数据支持当前的观点，即菌根共生通常是三方关联。
This review focuses on mycorrhizas, which are associations between fungi and the roots of 90% of terrestrial plants. These are the most common symbioses in the world,they involve about 6000 species of fungi distributed through all the fungal phyla and about 240,000 species of plants, including forest and crop plants. Thanks to mycorrhizal symbiosis and nutrient exchanges, regulated by complex molecular signals, the plant improves its vegetative growth, while the fungus accomplishes its life cycle. Molecular and cellular analyses demonstrate that during colonization the cellular organization of the two eukaryotes is completely remodeled. For example, in cortical cells, structural modifications involve both the host and the microbiont. Recent studies revealed that in arbuscular mycorrhizas (AM), system complexity is increased by the presence of a third symbiont: a bacterium living inside the fungus. The presence of this resident genome makes the investigation of the molecular dialogues among the symbiotic partners even more complex. Molecular analysis showed that the bacterium has genes involved in the acquisition of mineral nutrients. The experimental data support the current view that mycorrhizal symbioses are often tripartite associations.