Summary
Shoot water relations and carbohydrate levels were compared for droughted nonmycorrhizal and vesicular-arbuscular (VA) mycorrhizalRosa hybrida L. cv ‘Samantha’ plants grown with high and low phosphorus fertilization. Leaf diffusive conductance (g i ) of plants colonized byGlomus intraradices Schenk and Smith andGlomus deserticola Trappe, Bloss and Menge were 2 × and 1.5× greater, respectively, than in nonmycorrhizal plants. Regardless of P fertilization, leaf osmotic and bulk water potentials were 0.5 to 1.1 MPa higher in mycorrhizal than in nonmycorrhizal plants. Leaf starch, chlorophyll and water contents while fructose, glucose and total soluble carbohydrates were lower. Level of P fertilization had no effect on water relations or soluble carbohydrate content of nonmycorrhizal roses. The water status of droughted rose was impoved more byG. intraradices than byG. deserticola.
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Washington State University College of Agriculture and Home Economics Research Center Scientific Paper No. 7375.
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Augé, R.M., Schekel, K.A. & Wample, R.L. Leaf water and carbohydrate status of VA mycorrhizal rose exposed to drought stress. Plant Soil 99, 291–302 (1987). https://doi.org/10.1007/BF02370876
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DOI: https://doi.org/10.1007/BF02370876