Özer, AhmetWootten, Rodney2014-08-142014-08-142001Özer, A. ve Woottn, R. "Ultrastructural observations on the development of some actinosporean types within their oligochaete hosts." Turkish Journal of Zoology. 25: 199 – 216. 2001.http://mistug.tubitak.gov.tr/bdyim/abs.php?dergi=zoo&rak=0009-2https://hdl.handle.net/11486/331Synactinomyxon type 1, aurantiactinomyxon type 3, echinactinomyxon type 5 and raabeia type 4 were studied at the TEM level in order to determine the developmental stages within their oligochaete hosts. All the actinosporean types studied had uninucleate cells as the earliest stage of development. The formation of a subsequent binucleate cell stage was either due to the division of the nucleus in a uninucleate cell or the plasmogamy of two uninucleate cells. The earliest pansporocyst formation seen was two outer somatic cells surrounding two inner generative a and b cells in all the actinosporean types studied. However, the formation of an early pansporocyst followed a four-nuclei stage only in raabeia. Subsequently, the number of somatic and generative cells increased as a result of mitotic divisions and reached 8 a and 8 b cells at the end of the division stages. Echinactinomyxon had only four somatic cells in the pansporocyst, whilst synactinomyxon, aurantiactinomyxon and raabeia had eight. Following the copulation of each pair of a and b cells, eight zygotes were formed. Then, two mitotic divisions of each zygote resulted in a four-cell stage of each sporoblast. Valvogenesis and capsulogenesis was followed by the formation of eight mature spores inside each pansporocyst.Synactinomyxon tip1, aurantiactinomyxon tip3, echinactinomyxon tip5 ve raabeia tip4Õ n konak ?lar? olan oligoketlerdeki gelißim evreleri Transmisyon Elektron Mikroskobu (TEM) kullan?larak al?ß?ld?. al?ß?lan t m aktinospor tipleri gelißimlerinin en erken evresinde bir ekirdekli h crelerdi. Bir sonraki erken evre olan iki ekirdekli h cre, ya tek nukleuslu h credeki nukleusun b l nmesiyle ya da iki tek nukleuslu h crenin birleßmesiyle olußtu. T m aktinospor tiplerinde g zlenen en erken pansporokist olußum evresinde, d?ßtaki somatik h crelerin 2 adet olan a ve b generatif h crelerini evrelediÛi g zlendi. Ancak, erken sporokist olußumu sadece raabeiaÕda 4 ekirdek i eren h cre evresinini takiben ger ekleßti. Ard?ndan, somatik ve generatif h crelerin say?s? mitoz b l nme ile artt? ve sonunda 8a ve 8b h creleri olußtu. Synactinomyxon, aurantiactinomyxon ve raabeia 8 adet somatik h creye sahip olurken, echinactinomyxon sadece 4 adet h creye sahipti. Her bir a ve b iftinin kop lasyonu sonucu 8 adet zigot olußtu. Her bir zigottaki iki mitoz b l nmenin ard?ndan her sporoblastta 4 h creli evre ortaya ?kt?. Valf ve kaps l olußumu her bir pansporokistteki 8 adet ergin sporun olußumuyla sonu land?.enUltrastructureActinosporeaAurantiactinomyxonSynactinomyxonRaabeiaEchinactinomyxonMyxozoaElektron MikroskobuAktinosporArticle