菌根性植物病原体の遺伝的変換により,非病原性,エンドフィチ性相互性菌に変化する
Science (New York, N.Y.)
|April 2, 1993
まとめ
Colletotrichum magna (path-1) の非病原性変異体は,キノコの重要な特徴を保持したが,病原性を失っていた. この突然変異は,アントラコノースからキュルビット植物を保護し,病原性および宿主特異性に対する明確な遺伝的コントロールを示唆しています.
科学分野:
- 植物病理学 植物病理学
- 菌類学 菌類学とは
- 遺伝学 遺伝学とは
背景:
- コレトトリチュム・マグナ (Colletotrichum magna) は,キュルビットのアントラコノースを引き起こす糸状真菌である.
- 病原性および宿主特異性は,植物疾患の発症における重要な要因である.
研究 の 目的:
- Colletotrichum magna.の病原性および宿主特異性の遺伝的根拠を調査する.
- 非病原性突然変異体が他の重要なキノコの特徴を保持しているかどうかを判断する.
主な方法:
- 非病原性突然変異 (パス-1) の分離と特徴付け.
- 線路-1と野生型株の比較分析,インビトロ胞子化,粘着,アプレソリア形成,宿主コロニー化について.
- 後に発生する病原体に対するパス-1の保護効果の評価.
- パス-1と野生型株の交配の遺伝分析.
主要な成果:
- 経路-1変異体は,野生型の分泌,粘着,およびアプレッソリア形成のレベルを維持した.
- Path-1は宿主組織をエンドファイトとして植民地化し,野生型の宿主範囲を保持しました.
- PATH-1による予防接種は,後に発生するコレトトリキュムとフサリウム感染症から保護します.
- 遺伝子解析は,非病原性フェノタイプに起因する単一の局所変異を示した.
結論:
- Colletotrichum magnaの病原性と宿主特異性は,異なる遺伝因子によって制御されています.
- 非病原性突然変異のパス-1は,クキュルビットの病気に対する潜在的な生物制御剤として機能します.
- 菌類と植物の相互作用の遺伝的基盤を理解することは,効果的な病気管理戦略の開発に不可欠です.
関連する概念動画
01:09Microbe-Plant Interactions
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...
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...
01:29Fungal Group Zygomycota
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...
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...
01:22Microbial Interactions: Parasitism
Parasitism is a form of microbial interaction in which parasitic microbes exploit a host organism for nutrients and shelter, often at the host's expense. Unlike mutualistic relationships, where both organisms benefit, parasitism benefits only the parasite and harms the host.Classification of ParasitesMicrobial parasites are broadly classified based on their location relative to the host.Ectoparasites remain on the host’s surface, such as the skin or outer tissues, drawing nutrients...
01:26Microbial Interactions: Cooperation
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...