indicating effects of NH+4 on K+ uptake are mainly attributed to its influence on the quantity of potassium carriers located at the cell membrane instead of on the affinity of the uptake sites for K+.
indicating effects of NH+4 on K+ uptake are mainly attributed to its influence on the quantity of potassium carriers located at the cell membrane instead of on the affinity of the uptake sites for K+.
NH4+对供试作物K+吸收的Km值影响均很小,说明NH4+对K+吸收速率的影响主要在于影响了细胞膜上K+载体的数量而非影响了载体吸收位点与K+之间的亲和性。