The plant host pathogen interface: cell wall and membrane dynamics of pathogen-induced responses
1Department of Plant Pathology, Michigan State University, East Lansing, USA.
Annals of the New York Academy of Sciences
|July 28, 2007
Summary
Plants detect pathogens through complex networks. Research shows cell wall dynamics, membrane trafficking, and the actin cytoskeleton are crucial for activating plant resistance, alongside R-proteins.
Area of Science:
- Plant pathology
- Molecular plant-microbe interactions
- Plant immunity
Background:
- Host-pathogen interactions involve intricate molecular dialogues.
- Plant surveillance networks are regulated by host and pathogen factors.
- Understanding these interactions is key to improving crop resistance.
Purpose of the Study:
- To review current research on host-pathogen interfaces in plant systems.
- To highlight the role of cellular dynamics in plant resistance activation.
- To compare bacterial-plant and oomycete-plant interaction models.
Main Methods:
- Focus on Pseudomonas syringae-Arabidopsis and Phytophthora sojae-soybean interactions.
- Analysis of host-pathogen interface events.
- Review of recent findings on resistance response mechanisms.
Main Results:
- Cell wall dynamics, membrane trafficking, and actin cytoskeleton are vital for plant resistance.
- In Arabidopsis, actin machinery may link to R-protein-mediated resistance.
- Pathogen elicitors can directly trigger plant hypersensitive cell death, modulated by host R genes.
Conclusions:
- Plant resistance involves more than R-proteins; cellular dynamics play a key role.
- Actin cytoskeleton and membrane trafficking are integral to plant immunity.
- Specific host-pathogen interactions reveal complex, race-specific resistance modulation.
Related Concept Videos
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...
02:26Defenses Against Pathogens and Herbivores
Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
02:43Plant Cell Wall
The plant cell wall gives plant cells shape, support, and protection. As a cell matures, its cell wall specializes according to the cell type. For example, the parenchyma cells of leaves possess only a thin, primary cell wall.Collenchyma and sclerenchyma cells, on the other hand, mainly occur in the outer layers of a plant's stems and leaves. These cells provide the plant with strength and support by either partially thickening their primary cell wall (i.e., collenchyma), or depositing a...
01:07Plant Cell Wall
Plant cells have a cell wall, a rigid outer covering that protects the cell and provides shape and support. During cell division, a mixture of enzymes, proteins, and glucose molecules is transported via vesicles to the center of the cell. These vesicles continuously fuse and build a cell plate between the dividing cells. As the cell plate matures, new polysaccharides are added to it to form the cell walls of the daughter cells. The predominant polysaccharide in the cell wall is cellulose, made...
01:25Colonisation of Pathogens
Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
01:14Cell Adhesion in Plants
Plants have rigid cell walls that are made up of cell wall polysaccharides that mediate cell-cell adhesion. The primary cell walls of plants consist of two independent and interacting polysaccharide networks: a pectin matrix that embeds the second network comprising cellulose and hemicelluloses.
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose, and...
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose, and...