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Accueil du site → Master → Etats Unis → 1968 → Variations in number of leaf stomata and number of leaf vascular bundles in bermuda-grass, Cynodon dactylon (L.) Pers.

University of Arizona (1968)

Variations in number of leaf stomata and number of leaf vascular bundles in bermuda-grass, Cynodon dactylon (L.) Pers.

Akkad, Hani Abdul-Hameed

Titre : Variations in number of leaf stomata and number of leaf vascular bundles in bermuda-grass, Cynodon dactylon (L.) Pers.

Auteur : Akkad, Hani Abdul-Hameed,

Université de soutenance : University of Arizona

Grade : Master of Science (MS) 1968

Résumé
Nine selections of Cynodon dactylon (L.) Pens., were studied in Tucson, Arizona, to investigate variations among selections in gross leaf anatomy, numbers of leaf stomata, and vascular bundles. Epidermal features and stomatal counts were studied from leaf surface impressions taken with a cement material.’ Internal leaf anatomy and counts of leaf vascular bundles were studied from free-hand leaf cross sections. • Leaf anatomy, other than stomatal and vascular bundle numbers was generally uniform. Selections varied significantly in mean stomatal numbers per microscope field. Leaves and leaf surfaces varied significantly in stomatal numbers, but the variations were not of practical significance. Variations among leaf surface sections, particularly between base and tip were significant. Selections varied significantly in number of leaf vascular bundles. The relationship between number of stomata and number of vascular bundles was not significant. From a comparison of the theoretical variances of the difference between selection means, arising from different combinations of culms, leaves, leaf surfaces, leaf surface sections, and microscope fields, variations among selections of four or more stomata per microscope field may be detected .at 5% level with adequate precision by sampling four culms., one leaf, one leaf surface, two leaf surface sections, and five microscope fields *

Mots clés : Bermuda grass. ; Stomata.

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