نتایج جستجو برای: vernalization
تعداد نتایج: 824 فیلتر نتایج به سال:
In this paper we report on changes in DNA methylation pattern in rape apices and leaves during transition from vegetative to reproductive stage due to grafting and/or vernalization. Grafted plants of winter rape (Brassica napus L., var. "Górczański") (stock from vernalized, scion from non-vernalized plants) were used together with vernalized non-grafted plants. In addition, methylation status w...
Heading time in bread wheat (Triticum aestivum L.) is determined by three characters: vernalization requirement, photoperiodic sensitivity and narrow-sense earliness, which are involved in the phase transition from vegetative to reproductive growth. We identified and characterized the APETALA1 (AP1)-like MADS box gene in wheat (WAP1) as an activator of phase transition. Its expression starts ju...
A recombinant inbred durum wheat population was grown under three contrasting regimes: long days following vernalization (LDV), long days without vernalization (LD), and short days following vernalization (SDV). The length of several pre-anthesis stages and the number of leaves and the phyllochron were measured. Different groups of genes were involved in determining the phenology in the three t...
There is little information in the literature regarding North American varieties of spring wheat which are responsive to vernalization treatment. The same variety has been reported by different investigators to react positively or negatively to treatmenit. For example, VAN HOEK (3) obtained acceleration of maturity when springof wheat was vernalized, but treatmelnt of the same variety by GMELIN...
We have tested the hypothesis that the promotion of flowering by prolonged exposure to low temperatures (vernalization) is mediated by DNA demethylation [Burn, J. E., Bagnall, D. J., Metzger, J. M., Dennis, E. S. & Peacock, W. J. (1993) Proc. Natl. Acad. Sci. USA 90, 287-291]. Arabidopsis plants that have reduced levels of DNA methylation because of the presence of a methyltransferase (METI) an...
autumn sugar beet sowing has priority to its spring sowing in terms of economic productivity and water use efficiency. in khorasan razavi and khorasan-e-jonobi provinces, sugar beet is only sown in spring. therefore, it is necessary to evaluate the feasibility of autumn sugar beet sowing in these regions. using geographical information systems is the best and inexpensive way to identify suitabl...
Life cycle adaptation to latitudinal and seasonal variation in photoperiod and temperature is a major determinant of evolutionary success in flowering plants. Whereas the life cycle of the dicotyledonous model species Arabidopsis thaliana is controlled by two epistatic genes, FLOWERING LOCUS C and FRIGIDA, three unrelated loci (VERNALIZATION) determine the spring and winter habits of monocotyle...
Late-flowering ecotypes and mutants of Arabidopsis thaliana and the related crucifer Thlaspi arvense flower early after cold treatment (vernalization). Treatment with the DNA demethylating agent 5-azacytidine induced nonvernalized plants to flower significantly earlier than untreated controls. Cytidine at similar concentrations had no effect on time to flower. In contrast, late-flowering mutant...
Posttranslational modifications of histone tails are an important factor regulating chromatin structure and gene expression. Epigenetic memory systems have been predicted to involve mutually exclusive histone modifications that, through positive feedback mechanisms, generate bistable states. How the states are interconverted is not understood, and whether the histone modifications are sufficien...
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