Published: 10th Apr, 2021
The eDNA monitoring is a very common tool among researchers and regulatory agencies and the sampling of eDNA can help in determining the presence of organisms in a particular environment.
Context
The eDNA monitoring is a very common tool among researchers and regulatory agencies and the sampling of eDNA can help in determining the presence of organisms in a particular environment.
About
About eDNA
- DNA is the genetic material present in the cells of most living beings and animals and plants shed cells through the interaction with the environment.
- Over the time, environmental elements degrade the cells and expel the DNA.
- The size of DNA is quite small and is resilient that it can persist in the environment for months and years.
- Scientists call these DNA as residual or environmental DNA (eDNA).
How the eDNA study is conducted?
- The PCR is used to amplify DNA from the mitochondria of the trapped cells.
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PCR or the polymerase chain reaction
GenBank
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- The amplified DNA is then sequenced to have the genetic sequence.
- The sequenced DNA is compared with the sequences with those stored in an international database called GenBank to look for matches.
Significance of Study
- Presence study:Sampling eDNA can help in determining the presence of organisms in a particular environment.
- Varied study:eDNA has allowed scientists
- to surveil invasive species
- to study the spread of fungi and pollen in geographical regions
- to monitor aquatic environments
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