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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Parent-of-origin contributions to gene expression during sexual plant reproduction
 Pitoňak, Oliver ; Honys, David (advisor) ; Fischer, Lukáš (referee)
Sexual reproduction in flowering plants is fundamental to seed formation. After fertilization, the embryo is enclosed and develops in a seed together with a triploid tissue - the endosperm. In animals, early embryogenesis is well-known to be controlled by maternal RNA and proteins deposited in the ovule before fertilization. Even after the activation of zygotic genome, paternal and maternal genome do not play interchangeable roles. A few genes affecting embryo growth and development are transcribed either from maternally or paternally inherited alleles only. Such genes are example of the well-known phenomenon of gene imprinting. In plants, imprinting is well documented in the endosperm. The role of parent-of-origin contributions to gene expression has been studied less extensively in embryo. The aim of this work is to critically assess current knowledge of parent-of-origin contributions to embryo development in different plant species.
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Seed treatment with "Trisol" stimulative products– seed germination impact
 Šerá, Božena ; Hájková, M.
The seeds of barley (Hordeum vulgare L. RESPEKT) have been tested for stimulation effect of preparations originated in the BEIDEA company. Growth experiments were performed in sandy substrate, with 2 cm and 4 cm sowing, and under controlled conditions. Seed development, growth and dry weight of under- and aboveground seedlings were monitored. All preparations had a positive effect on the seed development and growth. Growth stimulatory effect is discussed in the text.
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