Naslov
Investigation of an oak of unknown origin

Autori
Guttenberger, Helmut ; Pfeifhofer, Hartwig ; Mueller, Maria ; Stabentheiner Edith ; Borzan, Želimir

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Forests and Society: The Role of Research - Abstracts of Group Discussions, Volume II / IUFRO Vienna ; Jandl, R ; Devall, M. ; Khorchidi, M. ; Schimpf, E. ; - Kuala Lumpur : Malaysian XXI IUFRO World Congress Organizing Committee, 2000, 47-47

Skup
XXI IUFRO World Congress 2000

Mjesto i datum
Kuala Lumpur, Malezija, 07.08.2000. - 12.08.2000

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Quercus; hermaphroditic flowers; hybrid; wood anatomy; leaf anatomy

Sažetak
An unusual oak of unknown origin growing near Zadar, Croatia is called the Green oak. This tree produces hermaphroditic flowers and flowering is not synchronized with other oaks in the vicinity. The tree has been classified as a putative hybrid between Quercus cerris L. and Q. ilex L., Quercus viridis Trinajstić. However, this classification is probably not accurate, as a hybrid between a species where acorns mature in the second year (Q. cerris) and a species where acorns mature in the first year (Q. ilex) has never been verified. To investigate the origin and taxonomic position of this tree, we conducted comparative investigations in wood and leaf anatomy and morphology of flowers and pollen among the Green oak and specimens of Q. cerris, and Q. ilex using a light microscope combined with digital image analysis and a scanning electron microscopy. The hairs of all three oak species were examined using several histochemical reactions and scanning electrom microscopy, and the DNA content of nuclei was measured. Volatile compounds of the leaves were determined using gas chromatography. The results of these investigations, and the origin of the green oak are discussed.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija

POVEZANOST RADA