Petru CUZA


The summary activity of oxidases, catalases and antioxidant substances in tree buds of Quercus robur, which are characterized by different terms of leaf, was determined. In the cells of apical buds, in spring, the change in the compo­nents that determine the oxidative reduction potential is earlier than in the lateral buds. The acceleration of the activation of the mentioned enzymes may be caused by the earlier elimination of dormancy apical buds in comparison with lateral buds. The activity of the substances that characterize the oxido-reductive potential for the stem cells of the pedunculate oak with early leaf is significantly higher than that of late-leaf trees. Considering the fact that the predecessors of early-fall descendants are of Southern origin, and the late ones come from the central part of the country, it is possible that their descendants have inherited in time, probably epigenetically, the ability to eliminate the dormancy state in accordance with the characteristic period of the ancestral specimens.


Quercus robur, early leaf, late leaf, catalase, oxidase, antioxidant, activity

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SNYDER R.L., MELO-ABREU J.P., MATULICH, S. Frost Protection: Fundamentals, Practice and Economics. Vol.2. Rome: Food and Agriculture Organization of the United Nations, 2005. 64 p.

CUZA, P. Instalarea şi menţinerea speciilor de stejar (aspecte teoretice şi practice). Chişinău: Mediul ambiant, 2017. 246 p.

MILESCU, I., ALEXE, A. Pădurile pe glob. Bucureşti: Editura Agrosilvică, 1969.

SPULAK, O., BALCAR, V. Temperatures at the margins of a young spruce stand in relation to aboveground height. In: J. Forest, 2013, no6, p.302-309.

KOLLAS, C., KOERNER, C., RANDIN, C.F. Spring frost and growing season length co-control the cold range limits of broad-leaved trees. In: J. Biogeogr., 2014, vol.41, p.773-783.

LARCHER, W., KAINMUELLER, C., WAGNER, J. Survival types of high mountain plants under extreme tem¬pe-ratures. In: Flora, 2010, vol.205, p.3-18.

LANG, G.A., EARLY, J.D., MARTIN, G.C., DARNELL, R.L. Endo-, para- and ecodormancy: physiological termi-nology and classification for dormancy research. In: Hort Science, 1987, vol.22, p.371-377.

PALONEN, P., LINDEN, L. Dormancy, cold hardiness, dehardening, and rehardening in selected red raspberry cultivars. In: J. Am. Soc. Hortic. Sci., 1999, vol.124, p.341-346.

CHARRIER, G., BONHOMME, M., LACOINTE, A., AMÉGLIO, T. Are budburst dates, dormancy and cold accli-mation in walnut trees (Juglans regia L.) under mainly genotypic or environmental control? In: Int. J. Biometeorol., 2011, vol.55, p.763-774.

BASLER, D., KOERNER, C. Photoperiod sensitivity of bud burst in 14 temperate forest tree species. In: Agric. For. Meteorol., 2012, vol.165, p.73-81.

LAUBE, J., SPARKS, T.H., ESTRELLA, N., HOFLER, J., ANKERST, D.P., MENZEL, A. Chilling outweighs photoperiod in preventing precocious spring development. In: Global Change Biology, 2014, vol.20(1), p.170-182.

CUZA, P., FLORENŢĂ, Gh. Antioxidant activity of substances extracted from buds of the trees of spontaneous oak species. În: Journal of Botany, 2017, vol.IX, no.2(15), p.96-103.

ЕНЬКОВА, Е.И. Климатические экотипы дуба. В: Научные записки Воронежского Лесохозяйственного института, 1946, т.IX, с.65-74.

ХАРИТОНОВИЧ, Ф.М. Сезонный прирост ранораспускающегося (Quercus pedunculata var. praecox) и поз-днораспускающегося (Quercus pedunculata var. tardiflora) дуба. В: Труды по лесническому опытному делу Украины, 1930, вып.15, с.18-24.

CUZA, P., ŢICU, L. Dinamica înfrunzirii la descendenţii de Quercus robur L. din cultura experimentală şi la arborii maturi. În: Mediul Ambiant, 2006, nr.6(30), p.24-28.

WISE, R., NAYLOR, A. Chilling-enhanced peroxidation. The peroxidative destruction of lipids during chilling injury to photosynthesis and ultrastructure. In: Plant Physiol., 1987, vol.83, p.272-277.

ЕНЬКОВА, Е.И. К генезису рано- и позднораспускающихся разновидностей дуба черешчатого на Русской равнине. Воронеж: Воронежский лесотехнический институт, 1980. 83 с.

SARVAS, R. Investigations on the annual cycle of development of forest trees. Active period. In: Commun. Inst. For. Fenn., 1972, vol.76(3), p.1-110.

MENZEL, A. Trends in phenological phases in Europe between 1951 and 1996. In: Int. J. Biometeorol., 2000, vol.44, p.76-81.


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