Enzymatic Characterization of NADP-dependent Isocitrate Dehydrogenization in Pinus sylvestris var. mongolica Ectomycorrhiza Effects of Sucrose on the Activities of Enzymes Involved in Ammonium Assimilation in Roots of Rice Cultivated in Different Nitrogen Source The Gene Expression Pattern of NAD-IDH Subunit 1 during the Development of Pollen and Seed in Brassica napus