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Given below are two statements
Statement (I) : Tylenchulus semipenetrans secrete ‘Gelatinous matrix’ through excretory pore
Statement (II) : Tylenchulus semipenetrans secrete ‘Gelatinous matrix’ through caudal glands
In light of the above statements, choose the most appropriate answer from the options given below.
EXPLANATION
Parasitic Adaptations, Feeding Habits & Secre
- Citrus Nematode (Tylenchulus semipenetrans) Biology:
- Egg Sac Gelatinous Matrix: Sedentary mature females of Tylenchulus semipenetrans remain semi-endoparasitic in citrus feeder roots. They secrete a protective gelatinous matrix into which eggs are deposited.
- Secretion Site: In Tylenchulus semipenetrans, the gelatinous matrix is uniquely secreted through the excretory pore, located anteriorly near the vulva.
- Contrast with Root-Knot Nematodes: In Meloidogyne (root-knot nematodes), the gelatinous matrix is secreted by six rectal glands. Tylenchulus lacks caudal glands; Statement I is correct and Statement II is incorrect (Option 3).
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