TML1和TML2协同调节结节,并在Medicago truncatula中影响状菌根
Diptee Chaulagain1, Elise Schnabel1, Mikayla Kappes2
1Department of Genetics and Biochemistry, Clemson University, Clemson, SC, United States.
Frontiers in plant science
|December 26, 2024
概括
在Medicago truncatula中MtTML1和MtTML2基因的突变显著增加结节的形成,双重突变显示出协同作用的20倍增加. 这些发现提供了关于植物微生物共生调节的见解.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物与微生物的相互作用
- 遗传学 遗传学 是一个
背景情况:
- 植物的共生过程,如结节 (固定) 和状菌根 (吸收) 是由植物的营养需求调节的.
- 结节的自我调节 (AON) 和菌根共生的自我调节 (AOM) 负面控制这些共生并共享调节组件.
- 太多的爱 (TML) 蛋白调节了日本莲花的结节数;Medicago truncatula具有两个同类,MtTML1和MtTML2.
研究的目的:
- 在Medicago truncatula中生成和描述MtTML1和MtTML2的单个和双重突变.
- 研究MtTML1和MtTML2在调节共生过程中的作用,特别是结节和状菌根的作用.
- 探索突变MtTML1和MtTML2对共生的协同效应.
主要方法:
- 使用CRISPR-Cas9向性突变发生,在MtTML1和MtTML2中产生稳定的突变.
- 选了一个转子子突变性库,以确定额外的等位基变异.
- 对单个和双重突变的表型分析进行,以量化结节数量并评估状菌根殖民.
主要成果:
- 在MtTML1或MtTML2中的单个突变产生的结节数量是野生类型植物的2-3倍.
- 双重突变 (MtTML1/MtTML2) 显示出协同效应,与野生类型相比,形成结节的数量大约是野生类型的20倍.
- 具有双重突变的植物在状菌根殖民中仅略有增加,这表明它们在这种共生中扮演的角色很小.
结论:
- MtTML1和MtTML2在Medicago truncatula中结节的自我调节中起着至关重要的协同作用.
- 遗传补偿机制可能有助于在双重突变中观察到的协同效应.
- 产生的突变物是剖析植物微生物共生背后的复杂机制的宝贵工具.
更多相关视频
20:01Single-plant, Sterile Microcosms for Nodulation and Growth of the Legume Plant Medicago truncatula with the Rhizobial Symbiont Sinorhizobium meliloti
Published on: October 1, 2013
17.7K
13:37Generation of Composite Plants in Medicago truncatula used for Nodulation Assays
Published on: March 27, 2011
16.7K
相关概念视频
01:25Microbial Interactions: Mutualism
38
Mutualism is a symbiotic interaction in which all participating organisms benefit. These relationships can be obligate or facultative and are fundamental to ecosystem functions across diverse biological systems.Plant–Fungi MutualismOne well-known example is the association between plant roots and mycorrhizal fungi, such as Rhizophagus species. The fungal hyphae penetrate the root hairs and the epidermis, forming an extensive hyphal network that establishes a symbiotic association. Through...
38
01:26Microbial Interactions: Cooperation
37
Microbial cooperation involves beneficial interactions in which different species work together for individual or mutual advantage. These interactions can profoundly influence ecological dynamics and evolutionary processes, and they are essential to many pathogenic and symbiotic relationships.Nematode–Bacteria CooperationA striking example is the relationship between the Gram-negative bacterium Xenorhabdus nematophila and the parasitic nematode Steinernema carpocapsae. Juvenile nematodes...
37
01:09Microbe-Plant Interactions
59
Microbe-plant interactions represent a dynamic spectrum of associations shaped by intricate chemical signaling. These interactions can be neutral, beneficial, or detrimental, and profoundly influence plant physiology, growth, and ecosystem function. The plant microbiome, comprising bacteria, fungi, archaea, protists, and viruses, plays a pivotal role in mediating these effects through surface colonization, internal colonization, or systemic symbiosis.Mutualistic associations, particularly with...
59
02:11The Roles of Bacteria and Fungi in Plant Nutrition
48.9K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
48.9K