Plant-parasitic nematode (PPN)

Plant-parasitic nematode" refers to a broad, non-specific group of nematode species (roundworms) that parasitize plants, rather than a single molecular target or receptor. These nematodes use a needle-like stylet to puncture plant cells and extract nutrients, secreting proteins and effectors that aid in host invasion, feeding site formation, and evasion of plant immune responses[2][6][7]. Plant-parasitic nematodes can be categorized by their mode of interaction with the host as ectoparasites (feeding from the outside) or endoparasites (feeding from within plant tissues); within endoparasites, further distinctions are made between migratory and sedentary lifestyles[1][3][4][10]. These organisms are major agricultural pests, causing root damage, reducing water and nutrient uptake, and often facilitating secondary infections by viruses and fungi[4][8]. Notable genera include Meloidogyne (root-knot nematodes), Heterodera and Globodera (cyst nematodes), and Pratylenchus (lesion nematodes)[1][3][4]. Because "plant-parasitic nematode" is a collective, ecological designation rather than a distinct molecular entity, it does not correspond to a specific protein, receptor, or therapeutic target, but rather a group of parasitic organisms with diverse molecular targets and interactions. Note on correctness: The entry "plant-parasitic nematode" is *not* a specific molecular target or receptor, but a category that encompasses many nematode species; it cannot be sensibly structured as a canonical drug target entity[2][3][7]. If a particular protein, enzyme, or receptor from a plant-parasitic nematode is of interest, such as specific nematode effectors or stylet proteins, a more precise molecular name should be specified.

Other names

PhytonematodeParasitic nematode of plants