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Biological particuliarities of the downy oak (Quercus pubescens Willd) in Moldova

Author: Florență Gheorghe
Degree:doctor of biology
Speciality: 03.00.05 - Botany
Scientific adviser: Petru Cuza
doctor habilitat, associate professor (docent), Moldova State University
Scientific consultant: Alexandru Dascaliuc
doctor habilitat, professor, Institute of Genetics, Physiology and Plant Protection of the ASM
Institution: Moldova State University


The thesis was presented on the 17 December, 2015
Approved by NCAA on the 25 February, 2016


Adobe PDF document1.70 Mb / in romanian


CZU 630.12:582.632.2(478)(043)

Adobe PDF document 3.98 Mb / in romanian
139 pages


downy oak, english oak, sessile oak, variability, acorn, germination, dormant, antioxidative substances, fluorescence


Thesis structure: introduction, 5 chapters, conclusions, bibliography comprised of 166 titles, total volume containing 122 pages of main text, 24 tables și 26 figures. The results are published in 13 scientific papers.

Field of study: Botany The aim of this thesis: Establishment of biological and ecological particularities of downy oak (Quercus pubescens Willd.) in order to maintain and develop methods and technological elements required, to optimize forest management.

Objectives: The analysis of natural downy oak brush structure and of the types of soil investigated in the experimental areas; Studying the specific of acorn germination and the particularities of growth of downy oak seedlings in different genetic families and backgrounds; Highlighting specificity of downy oak seedling growth based on their degree of shading; Determination in spring of the activity of antioxidant substances in extracts of buds from downy oak brush growing in various site conditions; Determination of the activity of antioxidant substances in extracts of buds of downy oak, English oak and holm collected for analysis in autumn, winter and spring from the trees in the Forest Department Zloti; Determination of resistance to high temperatures of different species of oak using fluorescence method.

The scientific novelty. The structure of the downy oak trees has been investigated at the level of an integrated system. Also the thesis analyzes descendants’ growth particularities, the oxidation-reduction potential and the thermal tolerance of oak species taking into account the trend of climate aridity.

The scientific problem solved. It lies in highlighting the downy oak’s biological and ecological aspects and the development of theoretical and practical bases for maintaining and extending the species in different areas of Moldova.

The theoretical significance of the thesis. It was demonstrated that high adaptation of the downy oak to conditions of heat and drought occurs due to the phenomenon of avoidance (mitigation) of the action of mentioned factors, determined by morphological structure of the leaves (enhanced pubescence, high degree of sectioning and albedo of leaves) and by the specific adjustment recorded by the dormant buds along latitude gradient conditioned by the activity of oxide-reductive substances from the buds.

The applicative importance of the work. There is scientific argumentation of the need to use acorn of local origin, avoid shading of downy oak seedlings and avoid their transplantation, which, along with shading, seriously affects the vitality of seedlings.

The implementation of scientific results: The scientific results are used as teaching material in the Faculty of Biology and Soil Science of Moldova State University and ”Moldsilva” Agency to install new downy oak groves.