Citation
Borzan Z., . and Pfeifhofer H., . and Guttenberger H., . and Muller M., . and Stabentheiner E., . (2000) Investigations of an oak of unknown origin. [Proceedings Paper]
Abstract
An usual 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 a hybrid between Quercus cerris L. and Q ilex L. Quercus viridis Trinajsti. 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 be 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 electron 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.
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Abstract
An usual 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 a hybrid between Quercus cerris L. and Q ilex L. Quercus viridis Trinajsti. 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 be 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 electron 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.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | Summary only En |
| AGROVOC Term: | QUERCUS |
| AGROVOC Term: | HYBRIDS |
| AGROVOC Term: | WOOD ANATOMY |
| AGROVOC Term: | PROVENANCE |
| AGROVOC Term: | LEAVES |
| AGROVOC Term: | POLLEN |
| AGROVOC Term: | LABORATORY EQUIPMENT |
| AGROVOC Term: | MICROSCOPY |
| AGROVOC Term: | GAS CHROMATOGRAPHY |
| AGROVOC Term: | CROATIA |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Norfaezah Khomsan |
| Last Modified: | 24 Apr 2025 05:27 |
| URI: | http://webagris.upm.edu.my/id/eprint/16515 |
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