*Washington State University College of Agriculture Scientific paper No. 7356.
GREATER LEAF CONDUCTANCE OF WELL-WATERED VA MYCORRHIZAL ROSE PLANTS IS NOT RELATED TO PHOSPHORUS NUTRITION*
Article first published online: 2 MAY 2006
Volume 103, Issue 1, pages 107–116, May 1986
How to Cite
AUGÉ, R. M., SCHEKEL, K. A. and WAMPLE, R. L. (1986), GREATER LEAF CONDUCTANCE OF WELL-WATERED VA MYCORRHIZAL ROSE PLANTS IS NOT RELATED TO PHOSPHORUS NUTRITION. New Phytologist, 103: 107–116. doi: 10.1111/j.1469-8137.1986.tb00600.x
- Issue published online: 2 MAY 2006
- Article first published online: 2 MAY 2006
- (Accepted 29 November 1985)
- Rosa hybrida;
- Glomus spp.;
- VA mycorrhiza;
- phosphorus nutrition;
- water relations
Plants of Rosa hybrida L. cv. ‘Samantha’, grown with high or low phosphorus (P) fertilization, were inoculated with Glomus intraradices Schenck & Smith, G. deserticola Trappe, Bloss & Menge, or left non-mycorrhizal. All plants except the low-P non-mycorrhizal group had similar tissue dry weights, leaf and root surface areas, growth ratios, stomatal characteristics and P contents. The higher rate of P fertilization increased plant dry weight three-fold and leaf area four-fold in non-mycorrhizal plants, but had no effect on growth characteristics of mycorrhizal plants except for a depression of colonization levels. Under well-watered conditions (75–90% and 45–50% relative soil water content, θ), low-P mycorrhizal plants displayed greater leaf conductance (g) than both high-P mycorrhizal and non-mycorrhizal plants. Leaf water potential (Ψ) was similar in colonized and uncolonized roses. Fungal species did not differ significantly in their influence on Ψ or g.