Effects of Zinc on Meristem Size and Proximity of Root Hairs and Xylem Elements to the Root Tip in a Zinc-tolerant and a Non-tolerant Cultivar of Festuca rubra L. |
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Authors: | POWELL, M. J. DAVIES, M. S. FRANCIS, D. |
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Affiliation: | School of Pure and Applied Biology, University of Wales, College of Cardiff P.O. Box 78, Cardiff CF1 1XL, UK |
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Abstract: | A 4 d exposure to zinc (0.1 and 02 µg Zn cm3) reducedthe length of the root apical meristem in a Zn-sensitive cultivar(S59) of Festuca rubra L. to a much greater extent than in aZn-tolerant cultivar (Merlin). In S59, Zn treatment also inducedroot hair and xylem formation much closer to the root cap boundarythan in control roots, whereas Merlin was only marginally affectedby Zn treatment. The data are discussed in relation to previouslyestablished effects of Zn on the cell cycle and other cellularcharacters of the two cultivars. zinc, meristem size, root hair, xylem, Festuca rubra |
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