Abstract
Investigations related to morphological and anatomical traits of leaves of four largefruited hazelnut (<i>Corylus</i> L.) cultivars characterised by different susceptibility to filbert aphid (<i>Myzocallis coryli</i> Goetze) feeding. The following parameters were measured: the thickness of leaf blade, the number of stomata, the length of secretory and mechanical hairs and their density on the leaf, the thickness of adaxial and abaxial epidermis and the thickness of their external cell walls. Observations of cross sections of the leaves were made in a light microscope and the surface of the adaxial epidermis was analysed in a scanning electron microscope. It was shown that leaves of the cultivars susceptible to <i>M. coryli</i> feeding had the thinnest leaf blade, especially in the main vein, and many more stomata. Besides, the cultivar most resistant to filbert aphid feeding, White Filbert, was marked by the largest height of the adaxial epidermis cells and the strongest striation of the cuticle in abaxial epidermis. On leaves of this cultivar, the number of mechanical hairs was the highest, while the lowest number of them was noted on Wonder from Bollwiller, the most susceptible cultivar.
Highlights
Observations of cross sections of the leaves were made in a light microscope and the surface of the adaxial epidermis was analysed in a scanning electron microscope
It was shown that leaves of the cultivars susceptible to M. coryli feeding had the thinnest leaf blade, especially in the main vein, and many more stomata
The cultivar most resistant to filbert aphid feeding, White Filbert, was marked by the largest height of the adaxial epidermis cells and the strongest striation of the cuticle in abaxial epidermis. On leaves of this cultivar, the number of mechanical hairs was the highest, while the lowest number of them was noted on Wonder from Bollwiller, the most susceptible cultivar
Summary
Analiza porównawcza cech anatomicznych liœci czterech odmian leszczyny wielkoowocowej (Corylus L.) wykazuj1cych ró¿n1 podatnoœæ na ¿erowanie zdobniczki leszczynowej (Myzocallis coryli Goetze) Odmiany Lamberta Bia3y i Mogulnus okaza3y siê czêœciowo odporne na zdobniczkê leszczynow1, natomiast odmiany Olbrzym z Halle, a w szczególnoœci Cud z Bollwiller charakteryzowa3y siê wysok1 podatnoœci1 na tego szkodnika. Gruboœæ blaszki liœciowej i nerwu g3ównego liœci badanych odmian leszczyny wielkoowocowej wykazywa3y zró¿nicowanie
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