High soil fertility decreases sucrose content and susceptibility of loblolly pine roots to ectomycorrhizal infection by Pisolithus tinctorius
High soil fertility decreases sucrose content and susceptibility of loblolly pine roots to ectomycorrhizal infection by Pisolithus tinctorius
复制标题
高土壤肥力降低了火炬松根部蔗糖含量和对豆科豆外生菌根感染的敏感性
作者：
D. Marx;A. Hatch;J. Mendicino
火炬松幼苗生长10周，没有外生真菌在低和高速率的完全土壤肥力，以及这些速率减去N，P，K，或Ca。土壤肥力对幼苗生长、针叶无机化学成分含量和短根可溶性碳水化合物含量有显著影响，尤其是高氮、高磷处理。侧根和短根的数量和长度不受土壤肥力的影响。短根的蔗糖和果糖含量在高氮和高磷水平下最低，葡萄糖未检测到。从10个肥力组合的每一个幼苗接种营养接种的Pisolithus tinctorius和培养19至21天，在中等水平的完全土壤肥力。显着更多的外生菌根形成的幼苗从完整的低生育率比那些从N和P.外生菌根的发展，从其他生育力组合的幼苗从这些极端的中间。Sucrose con.
Pinus taeda seedlings were grown for 10 weeks without ectomycorrhizae under low and high rates of complete soil fertility, as well as these rates minus N, P, K, or Ca. Seedling growth, inorganic chemical content of needles, and soluble-carbohydrate content of short roots were significantly affected by soil fertility, especially the high rates of N and P. Number and length of lateral and short roots were not affected by soil fertility. Sucrose and fructose contents of short roots were lowest at high levels of N and P; glucose was not detected. Seedlings from each of the 10 fertility combinations were inoculated with vegetative inoculum of Pisolithus tinctorius and incubated for 19 to 21 days at a moderate level of complete soil fertility. Significantly more ectomycorrhizae were formed on seedlings from the complete low fertility rate than on those from the high rates of N and P. Ectomycorrhizal development on seedlings from the other fertility combinations were intermediate from these extremes. Sucrose con...