Participation of the Tightly-Bound (Putative Cytoskeleton-Bound) Polysomes in Translation during Germination of Dormant and Non-Dormant Cereal Caryopses

Research was done on dormant and non-dorm ant barley cv. Ars caryopses and triticale cv. Grado caryopses treated and non-treated with abscisic acid (ABA). During germination higher participation of populations of so-called tightly-bound polysom es (TBP) in embryos of dormant barley caryopses was obs...

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Veröffentlicht in:Zeitschrift für Naturforschung C. A journal of biosciences 2000-01, Vol.55 (1), p.23-29
Hauptverfasser: Weidner, Stanisław, Łukaszewicz, Dorota, Amarowicz, Ryszard
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Sprache:eng
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Zusammenfassung:Research was done on dormant and non-dorm ant barley cv. Ars caryopses and triticale cv. Grado caryopses treated and non-treated with abscisic acid (ABA). During germination higher participation of populations of so-called tightly-bound polysom es (TBP) in embryos of dormant barley caryopses was observed, as well as their high metabolic activity. In embryos of triticale caryopses of which dormancy was imposed in an artificial way by ABA (100 μM), the strongest incorporation of C -amino acids into nascent polypeptide chains in vivo was found in population of TBP, as well as the highest participation among three of the studied fractions (free polysomes, membrane-bound polysom es and tightly-bound polysomes). These results may indicate the significant role of TBP (putative cytoskeleton-bound polysomes - CBP) in maintaining dormancy during imbibition of cereal caryopses.
ISSN:0939-5075
1865-7125
DOI:10.1515/znc-2000-1-206