Cytomixis Induced Meiotic Abnormalities in Pollen Mother Cells of Clematis flammula L. (Ranunculaceae)
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چکیده
منابع مشابه
Cytomixis in Pollen Mother Cells of Citrus Genotypes
A microsporogenesis analysis performed in several Citrus populations revealed the presence of cytomixis (i.e., chromatin migration between meiocytes) in pollen mother cells of diploid and tetraploid genotypes. Single and double chromatin bridges between adjacent meiocytes were mainly observed at prophase I, but also in the subsequent phases of first division and in the second meiotic division. ...
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Clematis flammula var. maritima is a woody lianoid plant that grows on coastal sand dunes in the Mediterranean region. Older perennial stems are present as extensive underground axes. These generate surface growth of shorter-lived stems producing monospecific trellises above the surface of the sand. Despite its sand dune habitat and shortage of host support plants, this variety of Clematis show...
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During the vase life of cut stems obstruction of xylem vessels occurs due to microbial growth, formation of tyloses, deposition of materials in the lumen of xylem vessels and the presence of air emboli in the vascular system. Such obstructions may restrict water uptake and its transport towards upwards thus lowering their ornamental value and longevity of cut flowers. Clematis is a very attract...
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Background: Despite the discovery of numerous antibiotics, drug resistance still remains as a major problem. Therefore, it is important to introduce and replace new sources of drug such as medicinal plants with antimicrobial properties. Objective: The genus Clematis (Ranunculaceae family) has six species in Iran. Aerial parts of Clematis have been used to cure fever and chronic diseases such a...
متن کاملAn Apparent Helical Arrangement of Ribosomes in Developing Pollen Mother Cells of Ipomoea Purpurea (l.) Roth
Behnke (1963) has recently described a helical arrangement of ribosomes in differentiating cells of the small intestine of the rat fetus, and Waddington and Perry (1963) have found the same structures in the muscle cells of Rana pipiens embryo. In the course of an investigation into the development of pollen in Ipomoea purpurea (L.) Roth, a similar arrangement of ribosomes has been seen in the ...
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ژورنال
عنوان ژورنال: CYTOLOGIA
سال: 2008
ISSN: 0011-4545,1348-7019
DOI: 10.1508/cytologia.73.381