Abstract
With the aim of analysing the influence of ploidity level upon characteristics of the flag leaf vascular tissue, the paper presents an investigation conducted on the species Triticum durum Desf. and Triticum aestivum L. Using the standard anatomical method, a highly significant difference has been recorded in the height of main vein bundle, the height and the width of the large lateral bundle, the height of both main vein and large lateral bundles and the width of large lateral bundle metaxylem vessels. Stereological analysis of the flag leaf vascular tissue has pointed to a significantly greater volume of the entire flag leaf vascular tissue, the main vein and the main vein parenchyma in T. durum. In T. aestivum significantly higher volume density of the main vein xylem has been recorded. Greater and mainly positive interrelationship between characteristics of the vascular tissue and morphological characteristics of the spike has been determined in the species T. aestivum.
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