Changes in ultrastructure and distribution of plasmodesmata and the process of differentiation for example anterydiostanów algae of the genus Chara

Describes the changes in the structure and distribution of plasmodesmata during the development of C. vulgaris anterydiostanów and C. tomentosa since the creation of the 24-cell germ to form mature spermatozoidów. These changes are associated with well-defined stages of differentiation, and may provide for adjustment of the structure and function of plasmodesmata in intercellular communication to the changing situation morphogenetic. It has been suggested that regulatory mechanisms symplastycznej the development and operation of the plant are universal.

Morphology and function of the mitochondria of sperm and male fertility. Part I. Normal morphology and function inserts the sperm

Sperm Mitochondria are structures unique and slightly different from somatic mitochondria . They undergo a series of morphological , biochemical and molecular changes associated with the expression of specific structural and enzymatic proteins , which are markers of maturation during spermatogenesis. These include , among others, gonadalny cytochrome cT , LDH - C4, sulfhydryl oxidase , protease LON and hsp60 . Activin A secreted by Sertoli cells when spermiogenezy mitochondria induces morphological changes spermatids , leading to the formation of condensed structures of these organelles.

The Editorial Board
Andrzej Łukaszyk - przewodniczący, Zofia Bielańska-Osuchowska, Szczepan Biliński, Mieczysław Chorąży, Aleksander Koj, Włodzimierz Korochoda, Leszek Kuźnicki, Aleksandra Stojałowska, Lech Wojtczak

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Katedra i Zakład Histologii i Embriologii Uniwersytetu Medycznego w Poznaniu, ul. Święcickiego 6, 60-781 Poznań, tel. +48 61 8546453, fax. +48 61 8546440, email:

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