MEIOSIS OF ALLIUM PORRUM, A TETRAPLOID SPECIES WITH CHIASMA LOCALISATION
نویسندگان
چکیده
منابع مشابه
The Effects of Medicago Sativa and Allium Porrum on Iron Overload in Rats.
PURPOSE Iron overload may occur due to regular blood transfusions and high intestinal iron absorption. Currently, there is no effective drug without side effects for the treatment of iron excess in thalassemia and other iron storage diseases, except chelation therapy, which is the only safe method for iron excretion. Thus, scientists are more focused on medicinal plants rich in phytochemical co...
متن کاملAn ultracytochemical study of nucleolar organization in meristematic plant cells (Allium porrum).
The interphase nucleolus in Allium porrum, as in many of the plant species studied so far, is highly heterogeneous in ultrastructure owing to the presence of coarse, contorted, thread-like structures, or nucleolonemata. Each nucleolonema appears to be sharply twisted and to give rise to a skein within the nucleolar mass. In order to characterize further these nucleolar components, a variety of ...
متن کاملChiasma Distribution and Segregation of Markers in Chromosome 2 of the Tetraploid Tomato.
T H E relation of chromosome behaviour at meiosis to genetic segregation ratios in tetraploids is well established (LITTLE 1945, 1958). In the tetraploid tomato, chromosome 2 is readily identified at meiosis and, owing to the presence of heteromorphic satellites, the mode of pairing of the four homologues can be analyzed. In addition, chromosome 2 has a number of genetic markers which are suite...
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Onion and garlic are best known for their pungent aromas, but these potent veggies have powerful effects on health and also there is urgent need to identify superior populations, quickly characterize and select elite candidates and breed new varieties for achieving current as well as future food and global health security needs. Hence this review article is focused on the analysis of the biolog...
متن کاملA cytochemical and radioautographic study of the ultrastructural organization of puff-like fibrillar structures in plant interphase nuclei (Allium porrum).
Loose, fibrillar, spherical structures have been observed during recent years in interphase nuclei of both animal and plant cells. These nuclear formations have been referred to as karyosomes, fibrillar bodies, micropuffs and centromeres. In order to gain further information on the nature of these structures, a cytochemical and radioautographic investigation was undertaken using plant meristema...
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ژورنال
عنوان ژورنال: Hereditas
سال: 2010
ISSN: 0018-0661
DOI: 10.1111/j.1601-5223.1940.tb03248.x