Comparative Studies on Leaf Micromorphology of the Abaxial Surface of Quercus robur L. subsp. robur and Quercus robur L. subsp. pedunculiflora (K. KOCH) MENITSKY

Ivett Margit Hegedűs; Sándor Bordács; Dénes Bartha

doi:10.37045/aslh-2023-0006

Authors

Ivett Margit Hegedűs Danube-Drava National Park Directorate, Pécs, Hungary https://orcid.org/0009-0001-8725-4913
Sándor Bordács Department of Botany, Hungarian University of Agriculture and Life Sciences, Budapest, Hungary https://orcid.org/0009-0009-5819-8738
Dénes Bartha Institute of Environmental Protection and Nature Conservation, Faculty of Forestry, University of Sopron, Sopron, Hungary https://orcid.org/0000-0001-7106-7614

DOI:

https://doi.org/10.37045/aslh-2023-0006

Keywords:

pedunculated oak, greyish oak, trichome, stomata, epicuticular wax, SEM, kocsányos tölgy, szürke tölgy, trichóma, sztóma, viaszréteg

Abstract

This study examined micromorphological traits on the abaxial surface of leaves using a Scanning Electron Microscope (SEM) to compare pedunculate oak and greyish oak taxa close-up. We selected a pedunculate oak population in Hungary and greyish oak population in Romania. The study randomly selected trees over 100 years old from these populations to investigate the differences between the two taxa based on leaf micromorphological characteristics. We focused mainly on indumentum because observing trichomes can be used in practice. Variation was found in trichome types, trichome-ray lengths, and stomata extent and shape. Stellate and fasciculate trichomes were absent on pedunculate oak leaves and densely developed on greyish oak leaves. The average length of the simple-uniseriate trichomes of pedunculate oak was 49.45 μm and 61.96 μm in greyish oak. On average, stomata surfaces on pedunculate oak leaves were 513.09 μm2 and 440.28 μm2 on greyish oak leaves. The study found no variation in epicuticular wax layer type. Despite the small sample size, in comparing the two populations, we found that the two taxa were distinguishable based on trichome types, and we believe that forestry practice could utilise this trait.

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Comparative Studies on Leaf Micromorphology of the Abaxial Surface of Quercus robur L. subsp. robur and Quercus robur L. subsp. pedunculiflora (K. KOCH) MENITSKY

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