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Genetics of esterases in Drosophila. VII. Genetic control of the activity level of juvenile hormone (JH)-esterase and heat resistance in D. virilis at high temperatures (1983)

Rauschenbach, I. Y. ; Lukashina, N. S. ; Korochkin, L. I.

Springer

Biochemical genetics 21 (1983), S. 253-265

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ISSN: 1573-4927

Keywords: esterase ; Drosophila virilis ; juvenile hormone ; electrophoresis ; heat sensitivity

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Chemistry and Pharmacology

Notes: Abstract The heat-resistant subline 147S was obtained in Drosophila virilis by selecting for viability individuals of heat-sensitive stock 147. It was shown that in the heat-treated 147S pupae the activity of juvenile hormone (JH)-esterase is decreased and, consequently, the titer of juvenile hormone is increased compared with those in the control pupae. These changes are consistent with those observed earlier for resistant stock 101. Heat-resistant stocks 101 and 147S were crossed with heat-sensitive stock 147, whose heat-treated larvae show earlier activation and higher activity of JH-esterase than control larvae. The viability and electrophoretic esterase patterns were analyzed in the F1 and F2 hybrids at different temperatures. It was found that the F1 hybrid is resistant to the effect of high temperature and its activity level of JH-esterase is lower compared with controls. In the F2 hybrid, there was a 3:1 segregation of viability and a 1:2:1 segregation of the activity level of JH-esterase at high temperatures. It is concluded that the activity level of JH-esterase and heat resistance in D. virilis are monogenically controlled at high temperatures.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00499137

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Role of pupal-esterase in the regulation of the hormonal status in two Drosophila virilis stocks differing in response to high temperature (1979)

Rauschenbach, I. Y. ; Lukashina, N. S. ; Korochkin, L. I.

Chichester [u.a.] : Wiley-Blackwell

Developmental Genetics 1 (1979), S. 295-310

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ISSN: 0192-253X

Keywords: Drosophila virilis ; high temperature ; p-esterase ; juvenile hormone ; Life and Medical Sciences ; Genetics

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Biology

Notes: Drosophila virilis stocks differing in reaction to high temperature (32°C) were studied. The sizes of the larval salivary glands, ring gland, and imaginal discs of the heat-sensitive stock 147, whose pupal (p) esterase was activated at 32°C, were found to be significantly smaller at high temperature than at 25°C. In larvae of the heat-resistant stock 101, whose p-esterase was inactivated at 32°C, the salivary glands and imaginal discs were larger under conditions of high temperature than those of the control larvae. Treatment of stock 147 larvae with ecdysone at 32°C did not affect p-esterase activity and was 100% lethal. By contrast, the juvenile hormone activated p-esterase under these conditions and normalized the development of stock 147 larvae. A scheme is suggested for the role of p-esterase in the regulation of the hormonal status of D. virilis under high temperature conditions.

Additional Material: 11 Ill.