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1. Introduction
2. Why the interest in symbiosis?
3. Bacterial cell surface carbohydrates
4. Adaptation of the bacterial cell surface
5. The symbiotic infection process
6. Rhizobium - "nod factors"
7. Microbes and plant defense
8. Nod factors and host defense
9. The animal/plant innate defense response
10. Chitin and nod factor recognition: a comparison
11. Rhizobium LPS structures
12. Rhizobial lipid A
13. Other rhizobial lipid A structures
14. Rhizobial lipid A 27-hydroxyoctacosanoic acid
15. The phenotype of an acpXL mutant
16. Changes in the bacteroid lipid A structure
17. Removal of OPS alters cell surface ionic character
18. The plant defense response to rhizobial LPS
19. Some questions to answer
20. Acknowledgements

Topics Covered

• Bacterial carbohydrates in microbe-host interactions
• Rhizobium cell surface carbohydrates and their role in forming a nitrogen-fixing symbiosis with their host legume
• Adaptation of bacterial cell surface carbohydrate structures in response to the host cell
• Production of a lipochitin oligosaccharide (LCO) by Rhizobium in response to flavonoids produced by the legume host
• Structures and relationship to a host defense response
• The plant defense response to rhizobial LCO
• The function of Rhizobial LCO as a microbial associated molecular pattern (MAMP)
• MAMP-triggered immunity
• Effector triggered immunity
• Rhizobial lipopolysaccharides (LPSs) in symbiosis
• Structures of the different LPS structural regions (lipid A, core oligosaccharide, and O-antigen polysaccharide) and their function in symbiosis
• The perception of rhizobial LPSs by the host
• Is rhizobial LPS a PAMP?
• Future research with LPS

Links

Series:

• Glycobiology

Categories:

• Biochemistry
• Cell Biology
• Microbiology
• Plant & Animal Sciences

Talk Citation

Carlson, R. (2012, November 27). The role of bacterial carbohydrates in microbe-plant interactions: Rhizobium- legume nitrogen-fixing symbiosis [Video file]. In The Biomedical & Life Sciences Collection, Henry Stewart Talks. Retrieved June 30, 2025, from https://doi.org/10.69645/XIST7128.
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Publication History

• Published on November 27, 2012

Financial Disclosures

• Prof. Russell Carlson has not informed HSTalks of any commercial/financial relationship that it is appropriate to disclose.