Xylem development and function in the grape peduncle: Relations to bunch stem necrosis

Authors

  • H. Düring
  • A. Lang

DOI:

https://doi.org/10.5073/vitis.1993.32.15-22

Keywords:

xylem, peduncle, water flow, bunch stem necrosis, disorders

Abstract

Using a simple flow test evidence is provided that in some grape varieties xylem development is suppressed just distal to each node of the peduncle system. A little further along, development is again normal giving a bottleneck appearance. The bottleneck would appear to offer a high resistance to xylem sap flow both because of its reduced area of cross-section and because of its having only small, primary vessels. The varieties exhibiting a distinct bottleneck tend to be those susceptible to bunch stem necrosis whereas the ones without it tend not to be susceptible.

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Published

2015-09-02

Issue

Vol. 32 No. 1 (1993): Vitis

Section

Article

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