Improved nematode extraction from carrot disk culture

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.
• 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.