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Titolo:
Calorimetric investigations of insect metabolism and development under theinfluence of a toxic plant extract
Autore:
Harak, M; Lamprecht, I; Kuusik, A; Hiiesaar, K; Metspalu, L; Tartes, U;
Indirizzi:
Tallinn Univ Pedag Sci, EE-10120 Tallinn, Estonia Tallinn Univ Pedag Sci Tallinn Estonia EE-10120 E-10120 Tallinn, Estonia Free Univ Berlin, Inst Biophys, D-1000 Berlin, Germany Free Univ Berlin Berlin Germany D-1000 t Biophys, D-1000 Berlin, Germany Estonian Agr Univ, Inst Plant Protect, EE-10120 Tartu, Estonia Estonian Agr Univ Tartu Estonia EE-10120 rotect, EE-10120 Tartu, Estonia Estonian Agr Univ, Inst Zool & Bot, EE-10120 Tartu, Estonia Estonian Agr Univ Tartu Estonia EE-10120 & Bot, EE-10120 Tartu, Estonia
Titolo Testata:
THERMOCHIMICA ACTA
fascicolo: 1, volume: 333, anno: 1999,
pagine: 39 - 48
SICI:
0040-6031(19990726)333:1<39:CIOIMA>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
TENEBRIO-MOLITOR; PUPAE; RELEASE;
Keywords:
direct calorimetry; respirometry; insects; gas exchange; standard metabolic rate; water loss; Pieris brassicae; Tanacetum roseum;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Harak, M Tallinn Univ Pedag Sci, Narva Mnt 25, EE-10120 Tallinn, Estonia Tallinn Univ Pedag Sci Narva Mnt 25 Tallinn Estonia EE-10120 nia
Citazione:
M. Harak et al., "Calorimetric investigations of insect metabolism and development under theinfluence of a toxic plant extract", THERMOC ACT, 333(1), 1999, pp. 39-48

Abstract

The cyclic gas exchange in the diapausing pupae (DP) of the cabbage butterfly Pieris brassicae was monitored by use of simple and sensitive twin differential calorimeter combined with automatic respirometer. Usually, the periodic CO2 releases in DP occurred as large, intermittent and micro bursts (i.e. in the form of respiratory cycles). By treating the DP with low doses of the extracts of the marguerite Tanacetum roseum the large cycles of gas exchange were abolished, but the intermittent and micro bursts were preserved. These treatments did not result in any neuromuscular hyperactivity. After the treatment the body mass loss of DP increased from 1.72+/-0.16 (females (2x) and 2.23+/-0.31 (males 2x)) mg g(-1) day(-1) for the untreated pupae to 2.25+/-0.38 (females (2x) and 3.05+/-0.76 (males 2x)) mg g(-1) day(-1) for the treated ones. All the DP who survived the treatment developed into pharate stages, but adult emergence failed. The untreated and control DP kept at room temperatures (20-25 degrees C) did not initiate adult development and died after having lost more than 25% of initial body mass. It is assumed that pyrethrum, a nonhormonal agent, acts directly on the brain, stimulating the release of the prothoracicotropic hormone (PTTH). (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 20:57:32