Augé RM, Schekel KA, Wample RL. 1987. Leaf water and carbohydrate status of VA mycorrhizal rose exposed to water deficit stress. Plant and Soil 99: 291-302. Shoot water relations and carbohydrate levels were compared for droughted nonmycorrhizal and vesicular- arbuscular (VA) mycorrhizal Rosa hybrida L. cv 'Samantha' plants grown with high and low phosphorus fertilization. Leaf diffusive conductance of plants colonized by Glomus intraradices Schenck and Smith and Glomus deserticola Trappe, Bloss and Menge were 2 x and 1.5 x 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 were higher in G. intraradices-colonized plants than in the high-P nonmycorrhizal plants, 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 improved more by G. intraradices than by G. deserticola.