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FMRFamide-related peptides in potato cyst nematodes
M J Kimber1, C C Fleming, A J Bjourson
1Parasitology Research Group, School of Biology and Biochemistry, Medical Biology Centre, Queen's University Belfast, 97 Lisburn Road, BT9 7BL, Belfast, UK.
Molecular and Biochemical Parasitology
|August 28, 2001
Summary
This study identifies FMRFamide-related peptides (FaRPs) in potato cyst nematodes (PCN), revealing novel genes and their presence in the nervous system. These findings suggest FaRPs play roles in PCN feeding and host penetration.
Area of Science:
- Nematology
- Neurobiology
- Molecular Biology
Background:
- FMRFamide-related peptides (FaRPs) are a diverse group of neuropeptides found in invertebrates.
- Their role in plant-parasitic nematodes, particularly potato cyst nematodes (PCN), is not well understood.
Purpose of the Study:
- To characterize FaRP encoding genes in PCN.
- To investigate the distribution and potential functions of FaRPs in PCN species (Globodera pallida and Globodera rostochiensis).
Main Methods:
- Rapid amplification of cDNA ends (RACE) was used to identify and characterize FaRP encoding genes (gpflp-1 to gpflp-5).
- Immunohistochemistry with an anti-FMRFamide antiserum was employed to detect FaRP-like immunoreactivity in PCN tissues.
Main Results:
- Five FaRP encoding genes were characterized, with several encoding novel FaRPs specific to PCN.
- FaRP-like immunoreactivity was detected in the central and peripheral nervous systems of both G. pallida and G. rostochiensis.
- Immunopositive neurons innervated the pharynx, nerve rings, and stylet muscles, suggesting roles in feeding and sensory perception.
Conclusions:
- This study provides the first characterization of FaRP encoding genes in a plant-parasitic nematode.
- FaRPs are implicated in the feeding, host penetration, and sensory functions of PCN.
- The findings highlight the importance and diversity of FaRPs within the phylum Nematoda.