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Content of glycogen and trehalose and activity of alpha-amylase and trehalase in Galleria mellonella larvae infected with entomopathogenic nematodes Steinernema affinis and S. feltiae

100%

Zoltowska K., Lopienska-Biernat E.

Wiadomości Parazytologiczne

2006

tom 52

nr 2

Introduction. The influence of infection with two species of entomopathogenic nematodes of Steinernematidae family on metabolism of glycogen and trehalose of the host was studied. Material and methods. Last instar larvae (L₇) of Galleria mellonella were experimentally infected with Steinernema affinis and S. feltiae. At 6, 12, 18 and 24 h after infection concentrations of trehalose and glycogen as well as activity of trehalase and α-amylase were determined. Results. The content of glycogen was lower in insects infected with S. feltiae than in the controls and animals infected with S. affinis. The content of trehalose was higher in insects from both infected groups than in the controls. Its concentration was slightly higher in larvae infected with S. affinis than in those infected with S. feltiae. The activity of α-amylase after infection with S. affinis was low. It was significantly higher in insects infected with S. feltiae. In animals of both infected groups, following a significant reduction at 6 h, the activity of trehalase remained at a similar level, higher than in the controls. In the paper the effects of infection with (i) different species of entomopathogenic nematodes and (ii) the importance of the developmental stage of the insect-host for changes in its metabolism of glycogen and trehalose were discussed.

Some studies on insect parasitic nematodes [Oxyurida, Thelastomatoidea, Thelastomatidae] from Manipur, North-East India

100%

Shah M. M.

Acta Parasitologica

2007

tom 52

nr 4

Four known species of insect parasitic nematodes were recovered from Periplaneta americana and Gryllotalpa africana. They are all redescribed in the present study. Key to species along with comparative measurement chart of all known species of Leidynema, Gryllophila and Hammerschmidtiella have been provided. Based on additional features that were not provided by previous workers the emended generic diagnosis of Thelastoma, Leidynema, and Hammerschmidtiella have been provided in the present study.

Ograniczanie wyników

1 Acta Parasitologica

1 Wiadomości Parazytologiczne

1 Lopienska-Biernat E.

1 Shah M. M.

1 Zoltowska K.

1 2007

1 2006

Wyniki wyszukiwania

Content of glycogen and trehalose and activity of alpha-amylase and trehalase in Galleria mellonella larvae infected with entomopathogenic nematodes Steinernema affinis and S. feltiae

Some studies on insect parasitic nematodes [Oxyurida, Thelastomatoidea, Thelastomatidae] from Manipur, North-East India