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Full Length Research Paper
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Cellular
energy allocation of pistachio green stink bug,
Brachynema germari Kol. (Hemiptera.: Pentatomidae) in
relation to juvenoid pyriproxyfen
Faezeh Bagheri, Khalil Talebi* and Vahid
Hosseininaveh
Department of Plant Protection, College of Agriculture,
University of Tehran,
Postal code 31587-77871, P.O.Box 4111,
Karaj, Iran.
*Corresponding author. E-mail:
khtalebi@ut.ac.ir. Tel: 98(261)2224022-24.
Fax: 98(261)2238529.
Abbreviations:
Ea, Energy available; Ec, energy consumption;
CEA, cellular energy allocation; ETS, electron
transport system; IGRs, insect growth regulators.
Accepted 30 July, 2010 |
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Abstract |
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The purpose of this study is to determine the effects of
pyriproxyfen (an insect growth regulator compound) on
cellular energy allocation of a heterometabolous insect,
Brachynema germari Kol. The fifth instar of this insect
was treated with 0, 20, 60, 100, 200 and 500 mg l-1
formulation of pyriproxyfen (Admiral 10EC) and the amount of
energy available (Ea), energy consumption (Ec)
and cellular energy allocation (CEA) were compared. The
resulting calculated energy reserves (carbohydrate,
glycogen, lipid and protein) showed that total lipid amount
varied significantly among doses and between each dose and
control. Lipid amounts fell as doses grew to 200 mg l-1
and then increased. A significant difference was observed in
total carbohydrate between each dose and control (P < 0.05);
however there were no significant differences among doses.
The amount of glycogen and total protein and also the amount
of energy consumption did not differ significantly from
control. Study results showed that pyriproxyfen at low
concentrations, raised cellular energy allocation but
decreased it at high concentrations.
Key words:
Pyriproxyfen, Brachynema germari, cellular energy
allocation, lipid, glycogen, protein. |
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