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Differences of two polychaete species reflected in enzyme activities
Ito, K.; Nozaki, M.; Ohta, T.; Miura, C.; Tozawa, Y.; Miura, T. (2011). Differences of two polychaete species reflected in enzyme activities. Mar. Biol. (Berl.) 158(5): 1211-1221. hdl.handle.net/10.1007/s00227-011-1641-7
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Ito, K.
  • Nozaki, M.
  • Ohta, T.
  • Miura, C.
  • Tozawa, Y.
  • Miura, T.

Abstract
    Polychaetes constitute most of the benthic macroinvertebrates in estuarine and coastal environments. We investigated the utilization of organic matter in two polychaete species, Capitella sp. I and Perinereis nuntia brevicirris, living in different coastal habitats. The protease activity of Capitella sp. I (89.7 µg mg-1) was about 10 times that of P. nuntia brevicirris (8.0 µg mg-1). High cellulase (endo-ß-1,4-glucanase) activity was detected in P. nuntia brevicirris (3.2 µg mg-1), whereas scarcely any was detected in Capitella sp. I. We isolated cDNA clones of protease mRNA from Capitella sp. I and of cellulase mRNA from P. nuntia brevicirris. The high protease activity of Capitella sp. I enabled it to survive in the sediment under a fish farm, where it degrades organic matter. In contrast, the high cellulase activity of the estuary-dwelling P. nuntia brevicirris allowed it to degrade organic matter originating from terrestrial areas.

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