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European Journal of Forest Research

, Volume 132, Issue 2, pp 211–218 | Cite as

Effects of shade on growth, biomass allocation and leaf morphology in European yew (Taxus baccata L.)

  • Philip M. Perrin
  • Fraser J. G. Mitchell
Original Paper

Abstract

The impact of shade on the growth of European yew (Taxus baccata L.) saplings was investigated over a three-year period using artificial shading to simulate four different light regimes (3, 7, 27 and 100 % relative photosynthetic photon flux density, RPPFD). There was no mortality attributable to shading even under the 3 % RPPFD treatment. Increasing shade was positively associated with specific leaf area, leaf length, leaf width and total chlorophyll content, but negatively associated with plant height, stem diameter, total dry weight and root to leaf and shoot ratio. Discoloration of the foliage occurred in plants grown in 100 % RPPFD conditions (resulting in reduced growth rates) and those transferred to 100 % RPPFD conditions after being shade-acclimated for 2 years. Evidence suggests that T. baccata has the ability to regenerate beneath a lighter canopy but beneath denser canopies gap dynamics will play an important role in facilitating successful regeneration and this needs to be reflected in management of natural populations of this declining species.

Keywords

Artificial shading Biomass allocation Leaf morphology Natural regeneration Taxus baccata 

Notes

Acknowledgments

This project was part of a wider investigation into the ecology of Taxus baccata funded by the National Parks and Wildlife Service of the Irish government. We would like to thank Dr. Steve Waldren and the staff of the Trinity College Botanic Garden for their assistance throughout the experiment and Prof. Michael B. Jones for comments on a draft of the manuscript. Two anonymous reviewers made many helpful suggestions.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Department of Botany, Trinity College DublinUniversity of DublinDublin 2Ireland
  2. 2.BEC Consultants Ltd., Ground Floor OfficesDublin 2Ireland

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