By P. D. Evans
Insect body structure is at the moment present process a revolution with the elevated program of molecular organic thoughts to enquire the molecular mechanisms underlying the physiological responses to insect cells.Advances in Insect body structure is commited to publishing prime quality studies on molecular biology and molecular genetics in components the place they supply an elevated realizing of physiological procedures in bugs. quantity 26 of this vintage seriescontinues to supply updated stories on topical topics of significance to all invertebrate physiologists and neurobiologists and includes elevated insurance at the molecular biology of insect body structure.
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Additional info for Advances in Insect Physiology, Vol. 26
A similar requirement for JH early in the process of egg development has been noted for many insects such as Schistocerca spp. , 1981), Culex pipiens (Spielman, 1974) and Musca domesticu (Adams, 1974). In Leucophaea maderae, Koeppe et al. (1980a, 1980b) noted several CELLULAR AND MOLECULAR ACTIONS OF JUVENILE HORMONE 31 structural changes and an increase in DNA synthesis in the follicle cells of females decapitated at emergence and subsequently treated with JH. 2). JH also stimulates DNA synthesis in the follicle cells of Leucophaea (Koeppe et al.
1981b) and, while the precise site of the synthesis was not identified, it seems likely that the follicle cells were among the primary targets. An early study (Gilbert, 1967) demonstrated that incubation of ovaries from Leucophaea in the presence of CA resulted in increased incorporation of palmitate into lipids, although it was not established whether the effect was on uptake of the fatty acid or on synthesis per se. 2). ' 32 G. R. WYAlT AND K. G. 3 Uptake into the follicle and oocyte. That J H affects the uptake of yolk proteins by the ovaries has been known for many years.
It has been known since the early studies of Wigglesworth (1936), who showed that mature spermatozoa continued to be produced in adult Rhodnius in the absence of the CA, that JH is not essential for spermatogenesis. Other CELLULAR AND MOLECULAR ACTIONS OF JUVENILE HORMONE 35 workers, while confirming that conclusion, demonstrated that allatectomy of the larval stages accelerated the rate of spermatogenesis in Bombyx mori (Fukuda, 1944), Periplunefu umericunu (Blaine and Dixon, 1970) and Ephesfiu kuhniellu (Nowock, 1973).
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