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Improved nematode extraction from carrot disk culture.

D T Kaplan, E L Davis

Journal of Nematology

|March 17, 2009

Summary

This study presents an optimized protocol for extracting burrowing nematodes (Radopholus spp.) and their eggs from carrot tissue cultures. The enhanced method utilizes specific enzymes and flotation techniques for improved yield and viability.

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Area of Science:

Plant Nematology
Agricultural Science
Invertebrate Zoology

Background:

Burrowing nematodes (Radopholus spp.) are significant plant pathogens.
Efficient extraction methods are crucial for studying nematode populations and developing control strategies.
Current methods may lack optimal efficiency for extracting viable nematodes and eggs from plant tissues.

Purpose of the Study:

To develop and optimize a protocol for the efficient extraction of viable Radopholus spp. and their eggs from carrot tissue cultures.
To evaluate the efficacy of different plant tissue maceration enzymes and flotation media.
To establish a reliable method for obtaining large quantities of nematodes for research.

Main Methods:

Carrot tissue cultures infested with Radopholus citrophilus or R. similis were used.

Keywords:

R. similis Radopholus citrophilus burrowing nematode egg enzyme migratory endoparasite nematode culture

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Plant tissue maceration enzymes (driselase, cellulysin) and flotation media (MgSO-7H0) were evaluated.

Optimized maceration involved a mixture of 0.50% driselase and 0.50% cellulysin per gram of tissue.

Incubation was performed on a rotary shaker at 175 rpm and 26°C for 24 hours.

Extraction was achieved via flotation using magnesium sulfate (sp. gr. 1.1).

Main Results:

A combination of driselase and cellulysin significantly improved the extraction of viable nematodes and eggs.
Magnesium sulfate flotation (sp. gr. 1.1) proved effective for separating nematodes and eggs from plant debris.
The optimized protocol allows for the extraction of large quantities of viable burrowing nematodes and eggs.

Conclusions:

The developed protocol offers a highly efficient method for extracting Radopholus spp. and their eggs from carrot disk cultures.
This method provides a valuable tool for researchers studying burrowing nematodes in plant pathology and crop protection.
The optimized enzyme and flotation technique ensures high viability of extracted nematodes and eggs.