دورية أكاديمية
Stereological analysis of mitochondria in embryos of Rana temporaria and Bufo bufo during cleavage.
| العنوان: | Stereological analysis of mitochondria in embryos of Rana temporaria and Bufo bufo during cleavage. |
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| المؤلفون: | Romek M; Department of Cytology and Histology, Institute of Zoology, Jagiellonian University, Cracow, Poland. romek@zuk.iz.uj.edu.pl, Krzysztofowicz E |
| المصدر: | Folia histochemica et cytobiologica [Folia Histochem Cytobiol] 2005; Vol. 43 (1), pp. 57-63. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: Polish Histochemical and Cytochemical Society at VM Media Country of Publication: Poland NLM ID: 8502651 Publication Model: Print Cited Medium: Print ISSN: 0239-8508 (Print) Linking ISSN: 02398508 NLM ISO Abbreviation: Folia Histochem Cytobiol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: <2011-> : Gdańsk : Polish Histochemical and Cytochemical Society at VM Media Original Publication: Warszawa : Polish Scientific Publishers, 1984- |
| مواضيع طبية MeSH: | Bufo bufo/*embryology , Cleavage Stage, Ovum/*ultrastructure , Mitochondria/*ultrastructure , Rana temporaria/*embryology, Animals ; Female ; Male ; Morula/ultrastructure ; Oocytes/ultrastructure ; Species Specificity |
| مستخلص: | Total numbers of mitochondria and their morphology have been quantitatively determined in mature oocytes and in cleaving embryos of two anuran species Rana temporaria and Bufo bufo using stereological methods. Surface densities of inner mitochondrial membranes for both studied species during cleavage ranged from 5.43 m2/cm3 to 7.53 m2/cm3, whereas volume densities of mitochondria did not exceed 1.65%. Since values of these parameters were low, thus embryos during cleavage may be considered as metabolically "silent". Transition of ultrastructural morphology of mitochondria towards that characterising actively respiring organelles occurs at stage 9 for R. temporaria and at stage 8 for B. bufo, correlated with blastula-gastrula and mid-blastula transition, respectively. The total numbers of mitochondria N(c) in mature oocytes are as high as 114.8 and 107.2 millions for R. temporaria and B. bufo, respectively, and during cleavage at late blastula stages they increase to 300 millions for both species under study. We suggest that an undefined mechanism might eliminate during cleavage those amphibian embryos which contain small number of mitochondria and low levels of nutrient substances. |
| تواريخ الأحداث: | Date Created: 20050506 Date Completed: 20050809 Latest Revision: 20191109 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1007/BF02687355 |
| PMID: | 15871564 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 0239-8508 |
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| DOI: | 10.1007/BF02687355 |