Abstract
Transection of anterior 5 segments inMetaphire peguana engenders characteristic changes in the functional activity of the ventral nerve cord-neurosecretory system in the event of cephalic regeneration. Of the two types of neurosecretory cells, the moderately stained cells remain more susceptible when the cell structure, location of nucleus, amount of secretory inclusions and their transportation to the zone of accumulation are considered. Overall engorgement of neurosecretory substances refrained from axonal transport, moderate axonal flow coupled with slight depletion and finally acute depletion at 24, 48 and 72 hr after amputation respectively are some of the notable features registered in course of this investigation. Disarray in the sequential changes involved in the secretory dynamics of neurosecretory cells, as well as extent of NSM accumulation both within and outer periphery of the ganglia provide evidence for the utilisation of material through repaired vascular systems during regenerative proliferations of anterior segments.
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References
Avel M 1929 Recherches expérimentales sur les caractères sexuals somatiques des Lumbriciens;Bull. Biol. France et Belg. 63 149–318
Bargmann W 1949 Über die neurosekretorische Verknüpfung von Hypothalamus und Neurohypophyse;Z. Zellforsch. 34 610–634
Cameron M L and Steele J E 1959 Simplified aldehyde fuchsin staining of neurosecretory cells;Stain Tech. 34 265–266
Dey M and Nanda D K 1979 Effect of posterior transection on the brain neurosecretory perikarya ofPheretima posthuma;Zool. Beitr. 25 199–204
Farber P A 1965 The histological relationship between neurosecretory activity and anterior regeneration inLumbricus terrestris;Anat. Rec. 151 348 (Abs.)
Harms J W 1948 Über ein inkretorisches Cerebralorgan bei Lumbriciden sowie Beschreibung eines verwandten Organs bei drei neuen Lycastis-Arten;Arch. Entw.-Mech. 143 332–346
Herlant-Meewis H 1962 Neurosecretory phenomena during regeneration of nervous centres inEisenia foetida;Mem. Soc. Endocrinol. 12 267–274
Herlant-Meewis H 1964 Regeneration in Annelids;Adv. Morphog. 4 155–216
Herlant-Meewis H 1972 Le rôle du systéme nerveus dans la cicatrisation chezEisenia foetida (abst.);Gen. Comp. Endocrinol. 18 596
Hoar W S 1975General and Comparative Physiology (New Delhi: Prentice Hall of India Private Limited) pp 752–753
Marcel R 1973 Cycle secretoires de cellules de la chaine nerveuse au course de la régénération chezEisenia foetida Sav. f. typica (Annélide, Oligochaète);Gen. Comp. Endocrinol. 21 30–44
Morgan T H 1902 Experimental studies of the internal factors of regeneration in the earthworm;Arch. Entw.-Mech. Org. 14 562–591
Nanda D K and Chaudhuri P S 1981 Studies on the cytomorphology of the ventral nervecord of the earthworm,Pheretima posthuma with special reference to neurosecretion;J. Zool. Soc. India (in press)
Nanda D K and Chaudhuri P S 1982 Regeneration of the neurosecretory system of the nerve ring in earthworm,Metaphire peguana; Acta Biol. Cracov. (in press)
Sayles L P 1940 Buds induced by implants of the anterior nerve cord and neighbouring tissues inserted at various levels inClymenella torquata;Biol. Bull. 78 298–311
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Nanda, D.K., Chaudhuri, P.S. The effect of cephalic transection on the micromorphological changes in the ventral nerve cord-neurosecretory system of earthworm,Metaphire peguana (Rosa, 1890) during anterior regeneration. Proc Ani Sci 91, 381–389 (1982). https://doi.org/10.1007/BF03186133
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DOI: https://doi.org/10.1007/BF03186133