ON THE HISTOCHEMICAL LOCALIZATION OF ALKALINE PHOSPHATASE AND ITS PHYSIOLOGICAL SIGNIFICANCE IN THE TESTICULAR NEPHRIDIA OF THE INDIAN LEECH <i>HIRUDINARIA GRANULOSA</i> (SAVIGNY)

B, Dev

doi:10.1177/12.5.311

Cited by 12 publications

(3 citation statements)

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“…Acetylated b-tubulin is a structural element of kinocilia present in proto-and metanephridia as well as in other organs (Worsaae and Mü ller, 2004;YounossiHartenstein and Hartenstein, 2000). Alkaline phosphatase (AP) activity, on the other hand, is a physiological marker for secretory and resorptive epithelia of gut, lung, and particularly nephridial structures (Dev, 1964(Dev, , 1968.…”

Section: Introductionmentioning

confidence: 99%

“…The marker has previously been used to elucidate the development of nephridia in the leeches Hirudinaria and Haemadipsa (Dev, 1964(Dev, , 1968. It also occurs in the oligochaete Tubifex hattai Shimizu, 2000, 2002) and seems to be a general marker for excretory structures as it is, for example, also found in the Malphighian tubules of insects (Cabrero et al, 2004), which are not derived from either protoor metanephridia.…”

Section: Introductionmentioning

confidence: 99%

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Three consecutive generations of nephridia occur during development of Platynereis dumerilii (Annelida, Polychaeta)

Hasse

Rebscher

Reiher

et al. 2010

Developmental Dynamics

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*Molecular data for nephridial development in polychaetes are not available yet. The scope of our work was to establish a reference system for future investigations using two markers for nephridial development: b-tubulin as marker for cilia and alkaline phosphatase (AP) activity for secretory epithelia. The markers identified, unexpectedly, three consecutively forming generations of nephridia: (1) a transitory unciliated, but AP-positive head kidney, (2) a transitory larval nephridium, which undergoes a morphological transition from a protonephridium to a funnelled nephridium concomitant with the development of the coelomic cavity and finally, (3) the serially arranged metanephridia. The spatial arrangement of larval and definitive nephridia, revealed an up to now unknown developmental boundary between the synchronously forming larval and the serially proliferating definitive segments. Development of three consecutive sets of nephridia with different morphology and biochemical properties was unexpected and reveals an interesting multistep process in the development of excretory structures in Platynereis.

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Section: Introductionmentioning

confidence: 99%