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Maturing ovarian follicles undergoing atresia were ultrastructurally analyzed. Using the method of Okr?s (1968) the process of luteinization was traced, taking place in the basal layer of cells of granulous membrane and in the cells of inner layer of theca interna during the atresia. In the atresia process, numerous electron dense granules arranged in packets and surrounded by tubular mitochondria are observed in the basal cell layer of granulous membrane. A considerable accumulation of the grains of reaction product and the presence of tubular mitochondria are also found in the cells of theca interna. Such a behaviour of those cells can be associated with an enhanced production of steroid hormones (mainly estrogens) in atretic follicles. 相似文献
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Bansal Mitaly Adamski Nikolai M. Toor Puneet Inder Kaur Satinder Sharma Achla Srivastava Puja Bansal Urmil Uauy Cristobal Chhuneja Parveen 《Molecular biology reports》2021,48(6):5209-5216
Molecular Biology Reports - Stripe rust and leaf rust are among the most devastating diseases of wheat, limiting its production globally. Wheat wild relatives harbour genetic diversity for new... 相似文献
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Morphological diversity of pedicels in phoretic deutonymphs of Uropodina mites (Acari: Mesostigmata)
Daria Bajerlein Wojciech Witaliński Zbigniew Adamski 《Arthropod Structure & Development》2013,42(3):185-196
The pedicel is a structure that connects the phoretic deutonymph of Uropodina mites with its carrier and enables dispersal. The shapes, lengths and diameters of pedicels formed by Uropoda orbicularis, Trichouropoda ovalis, Uroobovella pulchella and Uroobovella nova were studied by scanning and light microscopy. Pedicels of U. orbicularis and T. ovalis have the shape of a straight stalk. In U. pulchella, the pedicel is extremely short, irregularly shaped and composed of homogeneous material. The longest pedicel is found in U. nova and it may be helically coiled in this species. The length of the pedicel is positively correlated with deutonymph body size between species, but not within species. Pedicels of U. orbicularis and U. pulchella have the largest diameter. The pedicel diameter in U. orbicularis and T. ovalis is inversely proportional to its length, but not in U. nova and U. pulchella. The constituent of pedicel stems in U. pulchella is homogeneous, whereas in U. orbicularis and T. ovalis it contains a bundle of tightly packed fibres. In U. nova coiled pedicels are comprised of two layered materials of different electron density, one of which is electron lucid and located peripherally. Hypotheses on the origin of the pedicel are proposed. 相似文献
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Katarzyna Ciach Marek Niedoszytko Anna Abacjew-Chmylko Izabela Pabin Przemyslaw Adamski Katarzyna Leszczynska Krzysztof Preis Hanna Olszewska Dariusz G. Wydra Rita Hansdorfer-Korzon 《PloS one》2016,11(1)