The evaluation of phenotypic diversity of Thymus × Oblongifolius according to some anatomical characters and comparison with parent species

Kamašina, V. and Ložiene, K. (2009) The evaluation of phenotypic diversity of Thymus × Oblongifolius according to some anatomical characters and comparison with parent species. Acta Botanica Hungarica, 51 (1-2). pp. 85-97. ISSN 0236-6495

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Abstract

Lower and upper epidermises of leaves of interspecific hybrids Thymus × oblongifolius Opiz and its parent species — Thymus pulegioides L. and Thymus serpyllum L. — were studied using light microscope. The density of stomata and glandular trichomes, the diameter of glandular trichomes and the number of epidermal cells around the one glandular trichome were measured. The big diversity of investigated anatomical features was characteristic for T. × oblongifolius plants. The density of stomata and glandular trichomes distinguished for big diversity particularly. The stomata density on lower epidermis and the number of epidermal cells around the one glandular trichome on both epidermises of the interspecific T. × oblongifolius hybrid stood an intermediate position compared with those of parent species. The glandular trichomes density on upper and lower epidermises put together of leaves was major at T. × oblongifolius than at T. serpyllum and T. pulegioides , however the diameter of hybrids glandular trichomes was less than at parent species.

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