Explorations of Mechanisms Regulating Ectomycorrhizal Colonization of Boron-Fertilized Pine: Quarterly Report, 8/20/86-3/31/87

摘要

Shortleaf pine seedings were inoculated with Pisolithus tinctorius had extensive ectomycorrhizal development throughout the root system. Fructose, glucose, sucrose, pinitol, and myoinositol were extracted and quantitated from roots. Sucrose accounted for about one-third of the total sugar content. In general, mycorrhizal roots contained significantly higher concentrations of total carbohydrates than nonmycorrhizal roots. Among individual sugars identified, the concentrations of pinitol, fructose, glucose and sucrose were especially affected by ectomycorrhizal development and/or boron(B) fertilization. Mycorrhizal root systems contained greater concentrations of fructose than nonmycorrhizal root systems irrespective of method of B fertilization. Similarly, pinitol, glucose, and sucrose were typically more prevalent in mycorrhizal root systems although exceptions were found. Within mycorrhizal treatments, significant interactions were observed between method of B application and the concentration of individual sugars. In mycorrhizal plants, foliar + soil and soil application treatments yielded the greatest increases in individual sugars. Individual sugars in nonmycorrhizal roots were affected less by B fertilization than in mycorrhizal roots. Significant increases were, however, observed in fructose with either foliar + soil or soil-applied B, in glucose with foliar-applied B, and in sucrose with soil-applied B. 23 refs., 1 fig., 1 tab. (ERA citation 12:022364)