Cytological Studies on Luzula Chromosome IV. Meiosis of Luzula rufescens
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چکیده
منابع مشابه
Alternative meiotic chromatid segregation in the holocentric plant Luzula elegans
Holocentric chromosomes occur in a number of independent eukaryotic lineages. They form holokinetic kinetochores along the entire poleward chromatid surfaces, and owing to this alternative chromosome structure, species with holocentric chromosomes cannot use the two-step loss of cohesion during meiosis typical for monocentric chromosomes. Here we show that the plant Luzula elegans maintains a h...
متن کاملHolocentric chromosomes of Luzula elegans are characterized by a longitudinal centromere groove, chromosome bending, and a terminal nucleolus organizer region.
The structure of holocentric chromosomes was analyzed in mitotic cells of Luzula elegans. Light and scanning electron microscopy observations provided evidence for the existence of a longitudinal groove along each sister chromatid. The centromere-specific histone H3 variant, CENH3, colocalized with this groove and with microtubule attachment sites. The terminal chromosomal regions were CENH3-ne...
متن کاملVisualization of diffuse centromeres with centromere-specific histone H3 in the holocentric plant Luzula nivea.
Although holocentric species are scattered throughout the plant and animal kingdoms, only holocentric chromosomes of the nematode worm Caenorhabditis elegans have been analyzed with centromeric protein markers. In an effort to determine the holocentric structure in plants, we investigated the snowy woodrush Luzula nivea. From the young roots, a cDNA encoding a putative centromere-specific histo...
متن کاملنکاتی در مورد جنس (Luzula (Juncaceae، در ایران
در بررسی نمونه‌های تازه جمع‌آوری شده و نمونه‌های هرباریومی موجود گونه Luzula taurica (V.I. Krecz.) Novikov به عنوان گزارش جدید و L. spicata subsp. italica به عنوان گونه نادر با پراکنشی جدید از ایران شناسایی و گزارش می شوند. L. taurica نزدیک به L. multiflora است که وجه تمایز آنها در اندازه طول خامه و نسبت طول بساک به میله پرچم است. همچنین مقایسه‌های مورفولوژیکی و پراکنش جغرافیایی به همراه کلید...
متن کاملCytological studies in the Musae; meiosis in some diploid clones.
HE banana breeding program currently being carried out in Jamaica T is largely based on the progeny of the triploid (zn=33) Gros Michel crossed with a number of naturally occurring diploids. The bulk of such progeny have been found to be tetraploid (LARTER 1935 and unpublished; CHEESMAN and DODDS 1942), which suggests that Gros Michel has a tendency to throw a majority of triploids among its vi...
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ژورنال
عنوان ژورنال: Shokubutsugaku Zasshi
سال: 1962
ISSN: 0006-808X
DOI: 10.15281/jplantres1887.75.302