International Carnivorous Plant Society

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Comparative studies on the acid proteinase activities in the digestive fluids of Nepenthes, Cephalotus, Dionaea, and Drosera

Takahashi, Kenji and Koji Matsumoto and Wataru Nishii and Miho Muramatsu and Keiko Kubota and Chiaki Shibata and Senareth B.P. Athauda

Carniv. Pl. Newslett. 38(3):75-82
Published September 2009

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Abstract

There are various kinds of carnivorous plants in nature, and most of them excrete acidic digestive fluids which contain digestive enzymes, especially acidic proteinases, to digest trapped insects and other prey for nutrition (Juniper et al. 1989). Previous inhibitor studies (Lobareva et al. 1973; Takahashi et al. 1974; Tökés et al. 1974) indicated that the acid proteinase nepenthesin from Nepenthes belongs to the aspartic proteinase family. Recently, we purified two nepenthesins from the digestive fluid of N. distillatoria, investigated their molecular and enzymatic properties, and elucidated their primary structures by cDNA cloning of nepenthesins from N. gracilis (Athauda et al. 1998, 2002, 2004; Takahashi et al. 2005).

Keywords: Nepenthes; Cephalotus; Dionaea; Drosera

Article Citation

Takahashi, Kenji and Koji Matsumoto and Wataru Nishii and Miho Muramatsu and Keiko Kubota and Chiaki Shibata and Senareth B.P. Athauda. 2009. Comparative studies on the acid proteinase activities in the digestive fluids of Nepenthes, Cephalotus, Dionaea, and Drosera. Carniv. Pl. Newslett. 38(3):75-82.

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