Esterase activity in certain glands of leeches (Annelida: Hirudinea)

Lande, Virginia M. Van Der

doi:10.1016/0010-406x(68)90353-8

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…Moreover, blood-feeding leeches have their midgut (crop and intestine) differentiated into numerous caeca, enlarging its absorbent surface (Sawyer 1986;Rost-Roszkowska et al 2012). In the salivary glands of P. geometra, the high activity of esterase, as well as acid and alkaline phosphatases, is combined with the fact that they participate in dissolving the mucus covering the host skin and tissues (Jennings & van der Lande 1967;Van der Lande 1968). Van der Lande (1968) and Hovingh and Linker (1999) have also described the presence of esterases in the anterior region of the digestive system of P. geometra.…”

Section: Differences In Enzyme Activity Among Various Regions Of the Digestive System Of The Studied Taxamentioning

confidence: 99%

“…In the salivary glands of P. geometra, the high activity of esterase, as well as acid and alkaline phosphatases, is combined with the fact that they participate in dissolving the mucus covering the host skin and tissues (Jennings & van der Lande 1967;Van der Lande 1968). Van der Lande (1968) and Hovingh and Linker (1999) have also described the presence of esterases in the anterior region of the digestive system of P. geometra. Our study has revealed the activity of esterases and peptide hydrolases in the majority of the species examined here.…”

Section: Differences In Enzyme Activity Among Various Regions Of the Digestive System Of The Studied Taxamentioning

confidence: 99%

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The activity of hydrolytic enzymes in the digestive system of Acanthobdellida, Branchiobdellida and Hirudinida (Annelida, Clitellata) – considerations on similarity and phylogeny

Cichocka

Bielecki

Świątek

et al. 2021

The European Zoological Journal

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Activities of nineteen hydrolases were measured in the digestive systems of predatory and blood-feeding true leeches (Hirudinida) and their closest relatives, Branchiobdellida and Acanthobdellida. Hydrolase activities were analyzed in different parts of the digestive systems: the species-specific anterior part, i.e. jaws, pharynx or proboscis, crop and intestine. The results obtained suggest that food digestion and possible absorption predominate in the intestine of most of the studied Hirudinida and A. peledina, whereas in B. astaci these processes take place in the anterior part of the digestive system and crop. In Erpobdellidae and Piscicola respirans, the activity of acid and alkaline phosphatases, N-acetyl-β-glucosaminidase, leucine and valine arylamidases, and α-fucosidase was also detected in the anterior part of the digestive system. We also detected differences in enzyme occurrence between the studied species, which are probably connected with their different food preferences. Moreover, the presence of the whole spectrum of enzymes in predatory leeches and the absence of trypsin and α-chymotrypsin activity in the crop of all the leeches support the hypothesis that the leech ancestor was a blood-feeder. Our study showed that "Rhynchobdellida" constitute a paraphyletic group which confirms the previous results based on molecular phylogenetics, while Arhynchobdellida appears to be a non-monophyletic group which is not consistent with previous molecular results.

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Section: Differences In Enzyme Activity Among Various Regions Of the Digestive System Of The Studied Taxamentioning

confidence: 99%

Section: Differences In Enzyme Activity Among Various Regions Of the Digestive System Of The Studied Taxamentioning

confidence: 99%

The activity of hydrolytic enzymes in the digestive system of Acanthobdellida, Branchiobdellida and Hirudinida (Annelida, Clitellata) – considerations on similarity and phylogeny

Cichocka

Bielecki

Świątek

et al. 2021

The European Zoological Journal

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Studies on the host-parasite interaction and role of esterases during biting of the Indian cattle leech, Poecilobdella granulosa

Mishra

1976

Z. F. Parasitenkunde

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Histochemical localization of acetylcholinesterase and butyrylcholinesterase in the salivary glands has unfolded the significant fact that salivary glands are of two types, one being enzymatically negative and the other showing positive activity. Activity of these enzymes has been linked with the operation of glandular dynamics, particularly concerning the synthetic and secretory processes. The enzymes have been seen localized in the core of jaw. Contrary to it they are absent in the papillary and interpapillary zones of the jaw. Absence of esterases in the papillary and interpapillary ductules has been correlated with its possible non-involvement in the synthesis of vasodilating and anticoagulating materials. The experiments on effect of biting on host tissue give a faint indication of vascular dilation due to bite. Likewise, experiments on enzymatic state of a salivary gland after leech-bite reveal that the diminution of the reactive coverage area in the salivary glands reaches its maximum in the case of ATPase, indicating thereby its more involvement in salivary functions than those of esterases and acid phosphatase.

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Observations on the histochemical “Aminopeptidase” reaction in the intestine of certain species of leech (Annelida: Hirudinea), With particular reference to Erpobdella octoculata (L.)

Lande

1972

Comparative Biochemistry and Physiology Part A: Physiology

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Esterase activity in certain glands of leeches (Annelida: Hirudinea)

Cited by 6 publications

References 12 publications

The activity of hydrolytic enzymes in the digestive system of Acanthobdellida, Branchiobdellida and Hirudinida (Annelida, Clitellata) – considerations on similarity and phylogeny

The activity of hydrolytic enzymes in the digestive system of Acanthobdellida, Branchiobdellida and Hirudinida (Annelida, Clitellata) – considerations on similarity and phylogeny

Studies on the host-parasite interaction and role of esterases during biting of the Indian cattle leech, Poecilobdella granulosa

Observations on the histochemical “Aminopeptidase” reaction in the intestine of certain species of leech (Annelida: Hirudinea), With particular reference to Erpobdella octoculata (L.)

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