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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/11059

Title: Effects of Water Stress during Growth on Xylem Anatomy, Xylem Functioning and Vase Life in Three Zinnia elegans Cultivars
Authors: Twumasi, Peter
Leperen, W. van
Woltering, E.J.
Emons, A.M.C.
Schel, J.H.N.
Snel, J.F.H.
Meeteren, U. van
Marwijk, D. van
Issue Date: 2005
Publisher: Acta Hort.
Citation: Acta Hort. 669, ISHS 2005
Abstract: In cut flowers, hydraulic properties and dimensions of xylem vessels in the stem directly influence vase-life and thus post-harvest quality. Xylem hydraulic conductance as well as recovery from air embolisms at the start of vase life strongly depends on number, diameter and length of xylem vessels in the base of the cut flower stems. In this research we employed different water availability levels (high and low water content) in the growing medium of Zinnia elegans plants of three cultivars ('Envy', 'Purple Prince' and 'Scarlet Flame') to modify xylem anatomy and post-harvest xylem functioning and vase life of cut flowers from these plants. Vaselife was longer among fresh-cut Zinnia flowers in all three cultivars grown under low water content in the root medium. Zinnia flowers of all cultivars grown at high water content were not able to sufficiently restore water uptake at the start of their vase life. Shoot hydraulic conductivity was lower in water-stressed plants but it was not different among the three Zinnia cultivars within the same treatment. Anatomical analysis showed smaller xylem vessel diameters but no differences in xylem number and length, with the exception that in cultivar Purple Prince vessels were longer in well-watered plants. We conclude from these results that within these three Zinnia elegans cultivars water stress conditions in the root environment significantly affected xylem anatomy and functioning which correlates well with a longer vase life. Differences in xylem properties between the three cultivars due to pre-harvest watering treatments were limited.
Description: An article published by Acta Hort. 669, ISHS 2005
URI: http://hdl.handle.net/123456789/11059
Appears in Collections:College of Science

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