相互主義的な真菌は,真菌を栽培するアリで作物の多様性を制御する
Michael Poulsen1, Jacobus J Boomsma
1Institute of Biology, Department of Population Biology, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen, Denmark. Mpoulsen@bi.ku.dk
まとめ
葉切りアリはキノコを栽培し,衝突を防ぐためにクローン伝播を保証します. 消化後でさえ,他のコロニーの真菌の断片は拒絶され,共生体の純度が維持されます.
科学分野:
- ミルメコロジーはミルメコロジーの学科です.
- シンビオスのシンビオシス
- 菌類の遺伝学 菌類の遺伝学
背景:
- 葉切りアリ (AttaとAcromyrmex) は,共生菌を栽培して生計を立てています.
- 母から子コロニーへの真菌共生体の垂直伝播が優勢である.
- この戦略は,シンビオントの混合と潜在的なクローン間の衝突を最小限に抑えます.
研究 の 目的:
- 葉を切るアリの共生体における真菌の自己/非自己認識メカニズムを調査する.
- 垂直伝染とアリの消化にもかかわらず,真菌の不適合性が持続するかどうかを判断する.
- アリコロニー内の共生体の整合性を維持する際に真菌の認識が果たす役割を理解する.
主な方法:
- 異なるコロニーの菌糸体断片に対する真菌の拒絶反応の評価.
- キノコの不適合性化合物に対するアリ消化の影響を分析する.
- 菌類の成長に対する排泄液 (消化した断片を含む) の効果を調査する.
主要な成果:
- 菌類は,隣接するコロニーの菌糸体断片を積極的に拒絶し,先天的な不適合性を示す.
- 拒絶の強さは,真菌共生体間の遺伝的差異と相関しています.
- 不適合性化合物はアリの消化に生き残り,便の滴は拒絶反応を誘発する.
- 糞便の滴によってマヌリアルインプリントは,単一のアリコロニー内で複数の真菌クローンの栽培を防ぐ.
結論:
- 長期の垂直伝播にもかかわらず,真菌共生体は,強固な自己/非自己認識能力を保持しています.
- 糞便を含む真菌の相容れないメカニズムは,共生体の混合を防止し,コロニー固有の真菌作物の維持に不可欠です.
- この研究は,アリとキノコの相互関係を管理するキノコ共生体の積極的な役割を強調しています.
関連する概念動画
Epiphytes, Parasites, and Carnivores
16.5K
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...
16.5K
Overview of Fungi
1.5K
Fungi are a diverse group of eukaryotes more closely related to animals than other eukaryotes. Fungal cell walls comprise chitin, a polysaccharide that provides structural strength, and glucans, which contribute to flexibility and integrity. Other polysaccharides, such as mannans and galactosans, may supplement or replace chitin in some fungi. These adaptations, along with their preference for acidic environments and tolerance for high osmotic pressure, enable fungi to thrive in various...
1.5K
Fungal Phylum Basidiomycota
850
Basidiomycota is a diverse phylum of fungi that includes ecologically significant decomposers such as white rot fungi, symbionts like mycorrhizal fungi, plant pathogens such as rusts and smuts, and edible species like Agaricus bisporus (the common button mushroom). These fungi play crucial roles in nutrient cycling, symbiotic relationships, and even human health. Their defining feature is the basidium, a microscopic club-shaped structure responsible for producing basidiospores.Fruiting Bodies...
850
Fungal Group Zygomycota
968
Zygomycota, previously classified as a distinct fungal group, are primarily terrestrial, saprophytic molds that play a crucial role as decomposers. Recent phylogenetic studies have revealed that these fungi are now divided into two major clades — Mucoromycota, which includes many symbiotic species, and Zoopagomycota, which primarily consists of parasitic and pathogenic fungi. These groups exhibit distinct ecological roles and reproductive strategies while sharing key structural and...
968
The Roles of Bacteria and Fungi in Plant Nutrition
46.5K
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.
46.5K
Symbiosis
36.8K
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
36.8K


