Seminar 2.pptx
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The surface coat of nematodes lies external to the outermost epicuticle layer and is composed of proteins, carbohydrates, and lipids. It appears fuzzy and is called the glycocalyx. The glycocalyx is synthesized by hypodermal and gland cells, and its thickness varies between nematode species and life stages. It plays an important role in helping nematodes encounter environmental challenges as parasites of plants, animals, and insects.
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Root lesion nematode (Pratylenchus spp.) is an economically important plant-parasitic nematode. The genus is difficult to identify taxonomically as species look very similar even under high magnification. This study aimed to isolate and characterize Pratylenchus species found at the Indian Agricultural Research Institute farm in New Delhi through both morphological and molecular analysis in order to authenticate identifications. Soil samples were collected from different crops and nematodes were extracted and isolated. Specimens were then studied morphologically and through analysis of the internal transcribed spacer region of ribosomal DNA.
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Seminar 2.pptx
- 1. Welcome…
- 2. Role of nematode surface coat to encounter environmental challenges .
- 3. Nematodes are successful parasites Plant parasitic nematodes Animal parasitic nematodes EPN in insect haemocoel Cuticle
- 4. Basal layer : striated and contains collagen Medial layer : contains collagen, more variable and possess struts Cortical layer: possess annulations made up of cuticulins, lipids, proteins, and surface associated carbohydrates Epicuticle : outermost layer overlaid by an amorphous carbohydrate rich SC or glycocalyx Cuticle
- 5. Surface coat Lies external to the epicuticle Appears fuzzy and called as the glycocalyx Composed of proteins, carbohydrates and lipids Thickness differs between species and between different life stages Synthesized by Hypodermis and gland cells like excretory cells and amphids
Editor's Notes
- WELCOME