The activity of hydrolytic enzymes in the digestive system of Acanthobdellida, Branchiobdellida and Hirudinida (Annelida, Clitellata) – considerations on similarity and phylogeny
| Autor: | Izabela Jabłońska-Barna, Piotr Świątek, Aleksander Bielecki, Jarosław Kobak, Witold Strużyński, J. Hildebrand, Magdalena Rost-Roszkowska, Joanna M. Cichocka, Małgorzata Dmitryjuk |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
animal structures Clitellata Zoology hydrolases Branchiobdellida Biology phylogeny Blood feeding biology.organism_classification Closest relatives Enzyme QL1-991 chemistry Acanthobdellida Similarity (network science) digestive system Phylogenetics Animal Science and Zoology Food preferences blood feeding leeches |
| Zdroj: | The European Zoological Journal, Vol 88, Iss 1, Pp 26-43 (2021) |
| ISSN: | 2475-0263 |
| DOI: | 10.1080/24750263.2020.1851402 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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