Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 309417
Title Vascular occlusion in cut flowers. I. General principles and recent advances
Author(s) Doorn, W.G. van
Source Acta Horticulturae 482 (1999). - ISSN 0567-7572 - p. 59 - 63.
Department(s) Agrotechnological Research Institute
Publication type Refereed Article in a scientific journal
Publication year 1999
Abstract The vase life of many flowers is limited by an occlusion in the stem, leading to premature symptoms of water stress. The occlusion can be due to numerous factors inherent in the stem, such as the outflow - upon cutting - of latex, gum, mucilage, and resin, the deposition of mucilage into xylem vessels by adjacent living cells, or the formation of tyloses. The latter are outgrowths of living cells into the lumen of xylem conduits. These forms of occlusion are highly dependent on the species. Two other types of vascular occlusion occur in all cut flowers: blockage due to bacterial growth and the one due to the formation of gas bubbles (emboli). The latter is due to cavitation in the stems. Although bacterial occlusion occurs in all flowers, various species and cultivars respond differently. Although cavitation may occur in all flowers, there is a difference between species and cultivars in the time until the number of cavitations is high enough to hinder water flow. The literature on vascular occlusion has recently been summarised (van Doorn, 1997). In order to avoid repetition, a few recent developments are discussed in some detail: a) the effects of water temperature, b) cavitation as a result of bacterial blockage, and c) the importance of cavitation repair.
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