The role of experimental entomology in working out fundamental problems of physiology and medicine (L.A. Orbeli and experimental entomology)

Knyazev, A. N.

doi:10.1134/s001387381002003x

Cited by 3 publications

(4 citation statements)

References 4 publications

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“…As a result, the thermosensitive stages (embryos and larvae) immediately precede the diapausing stage (pre‐pupa) which made the thermal response particularly fast and labile ensuring the capacity to react to the peculiarity of a given year. The conservation of old functional relationships that have been ‘shadowed’ by new reactions was stated to be one of the general rules of evolutionary physiology (Knyazev ).…”

Section: Discussionmentioning

confidence: 99%

Maternal thermal effect on diapause inTrichogrammaspecies (Hymenoptera: Trichogrammatidae)

Войнович

Reznik

Vaghina

2015

J Applied Entomology

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Both direct thermal and maternal photoperiodic effects on diapause induction have been thoroughly investigated in many insect species, while maternal thermal effects have been infrequently studied. We studied the effect of temperature during development of maternal generation on the proportion of diapausing progeny in four species of the genus Trichogramma Westw., minute egg parasitoids, widely used for biological control of lepidopteran pests. The maternal generations were reared at day lengths of 12 and 18 h and temperatures of 17, 20, 25 and 30°C, and their progeny developed under day length of 12 h and temperatures of 13 and 14°C. In T. evanescens and T. piceum, the proportion of diapausing progeny decreased with increasing temperature under all tested photoperiods and thermal regimes of progeny development; the high temperature of 30°C totally averted diapause of progeny. In T. buesi and T. principium, low temperatures of 17 and 20°C resulted in relatively high proportion of diapausing progeny only when the maternal generation developed under short-day conditions. The threshold of the maternal thermal response varied from 17-18 to 22-23°C. Under field conditions, Trichogramma females are exposed to such high temperatures only during summer, when diapause in their progeny is in any case prevented by the maternal photoperiodic response and by the thermal response of the larvae. We conclude that the maternal thermal effect on diapause induction, although to a different extent, is inherent to Trichogramma species but, at least as suggested by laboratory experiments, it does not play any role in the regulation of seasonal development under natural conditions. However, during mass rearing of Trichogramma wasps, it should be taken into account that high temperature, even when combined with short photoperiod, can avert diapause in the next generation.

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Section: Discussionmentioning

confidence: 99%

Maternal thermal effect on diapause inTrichogrammaspecies (Hymenoptera: Trichogrammatidae)

Войнович

Reznik

Vaghina

2015

J Applied Entomology

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“…This complex of characters suggests that at least in certain Trichogramma species, these responses are rudimentary reactions: they had been inherited from ancestral forms, but then their adaptive value was lost. As noted above, such preservation of old functional relationships that have been "shielded" by new reactions and thus can be revealed only by special studies is one of the general rules of evolutionary physiology [19,20]. Rudimentary photoperiodic responses are not unique features of Trichogramma species.…”

Section: Regulation Of Diapause In Trichogrammae: Hierarchy Of Interamentioning

confidence: 99%

“…Moreover, according to statements of modern evolutionary physiology [19,20], this latent photosensitivity "inhibited and screened" with the dominant responses not always disappears completely and therefore can be revealed in special experiments. However, as far as we know, the studies dealing with detection and comparative analysis of "dominating" and "secondary" photothermal responses characteristic of different developmental stages of one species (or a group of closely related species) are rather scarce.…”

Section: Introductionmentioning

confidence: 98%

Ecological and evolutionary aspects of photothermal regulation of diapause in trichogrammatidae

Reznik

2011

J Evol Biochem Phys

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Facultative winter diapause in the genus of Trichogramma Westw. (Hymenoptera, Trichogrammatidae), like in most other insect species, is regulated by photoperiod and temperature. Their prepupae are diapausing, but sensitivity to temperature and day length (environmental cue factors inducing diapause) is characteristic of all stages of development from embryo to the egglaying female. The environmental cues can affect not only the current, but also the next generations. Under the natural conditions, the photothermal regulation provides the timely diapause induction coordinated both with the astronomical season (the photoperiodic response) and with the peculiarity of the given year (the thermal response). The special experiments revealed "rudimentary responses" that had lost their adaptive role. The results of these studies have proved once more that the specificity of photoperiodic and thermal diapause-regulating responses, their relative importance, and association with sensitive stages of development are determined not only by the ecological peculiarities of different insect taxa, but also by their previous evolution.

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“…"Singing" orthopterous insects, including crickets, are classical objects for investigating various forms of acoustic behavior in animals, for instance, territorial, aggressive, and sexual behavior [1][2][3][4][5]. At the imaginal stage of ontogenesis the orthopterous insects, together with homopterans and lepidopterans, have the completely formed tympanic (auditory) organ, which allows them to perform "sufficiently perfect analysis of sound signals" [6].…”

Section: Introductionmentioning

confidence: 99%

Development of sexual and protective behavior of female crickets Gryllus argentinus Sauss. at the prereproductive and reproductive periods of imaginal ontogenesis

Zhemchuzhnikov

Knyazev

2011

J Evol Biochem Phys

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Data are presented about the development of reproductive and defense behavior of noncopulated female crickets Gryllus argentinus Sauss. in the beginning of the imaginal ontogeny. The character of interaction of females with "virtual" males (the "supporting ball" method-"trackball") was studied. The forms of female motor reactions to models of intraspecies male sound signalsthe calling and aggressive songs-are described and analyzed. The character of the development of female acoustic behavior is described as judged by change in the forms of motor reactions in the course of the imaginal ontogeny. It is shown that immediately after the imaginal molt the reproductive behavior is not formed yet but it matures gradually within a few days. At the early stages of the imaginal ontogeny passive defense behavior is found to be most clearly expressed.

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The role of experimental entomology in working out fundamental problems of physiology and medicine (L.A. Orbeli and experimental entomology)

Cited by 3 publications

References 4 publications

Maternal thermal effect on diapause inTrichogrammaspecies (Hymenoptera: Trichogrammatidae)

Maternal thermal effect on diapause inTrichogrammaspecies (Hymenoptera: Trichogrammatidae)

Ecological and evolutionary aspects of photothermal regulation of diapause in trichogrammatidae

Development of sexual and protective behavior of female crickets Gryllus argentinus Sauss. at the prereproductive and reproductive periods of imaginal ontogenesis

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