东道主制裁和豆类-生植物互惠主义
E Toby Kiers1, Robert A Rousseau, Stuart A West
1Agronomy and Range Science, University of California, 1 Shields Avenue, Davis, California 95616, USA.
Nature
|September 5, 2003
概括
大豆会惩罚不合作的固细菌 (菌). 这项研究表明,当大豆未能固定气时,大豆会将根茎生物的繁殖成功降低50%,从而稳定相互关系.
科学领域:
- 进化生物学 进化生物学
- 植物与微生物的相互作用
- 这种共生是共生.
背景情况:
- 物种之间的相互合作是进化生物学中的一个关键问题.
- 了解宿主如何管理共生体的表现和制裁"作弊"对于稳定互惠主义至关重要.
研究的目的:
- 调查大豆 (宿主) 是否能够检测和惩罚未能固定大气 (N) 的根茎生物 (共生生物).
- 确定大豆对不合作的根茎植物实施制裁的机制和范围.
主要方法:
- 通过改变结节大气层,使其无N2 (Ar:O2) 的状况,阻止了一种互利的根茎菌株固定N2 (Ar:O2).
- 在多个空间尺度上进行了实验:整个植物,半根系和单个结节.
- 使用非侵入性监测来评估潜在的制裁机制.
主要成果:
- 通过阻止N(2) 固定,强迫根茎植物不合作 (即作弊) 将其生殖成功降低约50%.
- 对结节的氧气 (O(2) 供应减少被确定为对作弊的根茎菌实施制裁的潜在机制.
结论:
- 大豆积极惩罚未能提供N(2) 固定的互惠服务的根茎菌.
- 主机制裁,可能涉及O(2) 监管,是稳定相互共生的重要机制.
更多相关视频
10:58Plant Promoter Analysis: Identification and Characterization of Root Nodule Specific Promoter in the Common Bean
Published on: December 23, 2017
13.1K
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
相关概念视频
02:40Epiphytes, Parasites, and Carnivores
17.0K
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
17.0K
01:22Inorganic Nitrogen Assimilation
708
Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
708
02:11The Roles of Bacteria and Fungi in Plant Nutrition
47.6K
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.
47.6K