Badania cytologiczne nad rodzajem Luzula [Cytological investigations on Luzula]
نویسندگان
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 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 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 کاملComparison of gas exchange and bioassay determinations of the ammonia compensation point in Luzula sylvatica (Huds.) Gaud.
Determinations of the NH(3) compensation point for the understory plant of semi-natural woodlands Luzula sylvatica (Huds.) Gaud. were carried out by measurements of gas exchange and by calculation from the NH(4)(+) concentration and pH of extracts of the foliar apoplast. Compensation points determined by gas exchange measurements were among the lowest yet reported (0.51-1.10 microg NH(3) m(-3))...
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...
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ژورنال
عنوان ژورنال: Acta Societatis Botanicorum Poloniae
سال: 2017
ISSN: 2083-9480
DOI: 10.5586/asbp.1953.011