During the period of menopause as an effect of changes in hormone status, one of the most common ailments for women is hair loss. Taking into consideration fact that the ingredients of diet contained in various groups of consumed food products are both precursors in steroid hormones synthesis as well as have direct impact on structure, growth and keeping hair in skin integument, this is the rea...

changes during metamorphosis, a process influenced by hormones, mainly 20-hydroxyecdysone (20E). To understand metamorphosis at the molecular level, we investigated gene expression changes in the honeybee thoracic integument during adult cuticle formation. Using cDNA microarrays constructed from 13,440 oligos, we monitored gene expression during pupal/ pharate-adult transition at three specific...

changes during metamorphosis, a process influenced by hormones, mainly 20-hydroxyecdysone (20E). To understand metamorphosis at the molecular level, we investigated gene expression changes in the honeybee thoracic integument during adult cuticle formation. Using cDNA microarrays constructed from 13,440 oligos, we monitored gene expression during pupal/ pharate-adult transition at three specific...

Measurements of electrical resistance appear to be useful indicators of porosity and related water permeability in insect cuticle. To develop an adequate understanding of how such measurements relate to the physical and structural properties of the integument, we made detailed determinations of resistance and impedance values for pronotal cuticle in adult male Periplaneta americana. The most co...

When an insect molts, old cuticle on the outside of the integument is shed by apolysis and a new cuticle is formed under the old one. This process is completed by the epidermal cells which are controlled by 20-hydroxyecdysone (20E) and juvenile hormone. To understand the molecular mechanisms of integument remolding and hormonal regulation on the gene expression, an epidermal cell line from the ...

The aim of this study was to describe the anatomy and ontogeny of Pterodon emarginatus seed using the usual techniques. The ovules are campilotropous, crassinucelate, and bitegmic. The following processes occur during integument development: anticlinal divisions and phenolic compound accumulations in the exotesta, whose cells become palisade; predominantly periclinal divisions and cell expansio...

The outer integument of Arabidopsis ovules exhibits marked polarity in its development, growing extensively from the abaxial side, but only to a very limited extent from the adaxial side of the ovule. Mutations in two genes affect this asymmetric growth. In strong inner no outer (ino) mutants outer integument growth is eliminated, whereas in superman (sup) mutants integument growth on the adaxi...