Ultrastructural Study of Spermatogenesis in Eisenia foetida (Annelida, Oligochaeta)
نویسندگان
چکیده
منابع مشابه
Earthworms newly from Mongolia (Oligochaeta, Lumbricidae, Eisenia)
Two new megadrile earthworms from the steppes, the first species wholly from Outer Mongolia, are ascribed to the partially parthenogenetic Eisenia nordenskioldi (Eisen, 1879) species-complex. Taxonomic justification of sympatric Eisenia nordenskioldi mongol and Eisenia nordenskioldi onon ssp. n. are supported by mtDNA COI barcodes. The unreliability of molecular differentiation based on voucher...
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Spermatogenesis in the charophyte Nitella has been followed in antheridia prepared for light and electron microscopy. The antheridial filament cells contain paired centrioles which are similar in structure and behavior to the centrioles of animal cells. In the early spermatid, the centrioles undergo an initial elongation at their distal ends and become joined by a spindle-shaped fibrous connect...
متن کاملAn Ultrastructural Study of Plant Spermatogenesis
Spermatogenesis in the charophyte Nitella has been followed in antheridia prepared for light and electron microscopy. The antheridial filament cells contain paired centrioles which are similar in structure and behavior to the centrioles of animal cells. In the early spermatid, the centrioles undergo an initial elongation at their distal ends and become joined by a spindle-shaped fibrous connect...
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Hsi-Te Shih, Hsueh-Wen Chang and Jiun-Hong Chen (1999) A review of the earthworms (Annelida: Oligochaeta) from Taiwan. Zoological Studies 38(4): 435-442. The study of earthworms of Taiwan began with the Japanese scholars Goto and Hatai (1898). The collecting sites from available publications are limited to Ilan, Taipei, Taoyuan, Hsinchu, Miaoli, Kaohsiung, and Pingtung. A total of 26 species be...
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We describe the morpho-functional effects of different concentrations of okadaic acid (OA) on specimens of Enchytraeus crypticus. The results demonstrate that this experimental model is very sensitive to the treatment and presents timeand dose-related effects mainly involving an immune response associated with a reaction in the chloragogenous tissue. At the lower dose (100 nM), the main organs ...
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ژورنال
عنوان ژورنال: International Journal of Morphology
سال: 2007
ISSN: 0717-9502
DOI: 10.4067/s0717-95022007000200005