Nitrate(NO-3)is the main source of inorganic nitrogen for plants in aerobic soil conditions.Nutrient solution experiments were conducted with two winter wheat(Triticum aestivum L.)cultivars,‘Shimai 15'and ‘Hengguan 35',as the tested crops.The objective was to investigate the changes in Ca2+-CaM signaling and root growth of wheat under different concentrations of nitrate supply.Net Ca2+ion fluxes in different root zones were measured noninvasively using the scanning ion-selective electrode technique.Calmodul...
(1.Key Laboratory of Plant Nutrition and Fertilizer,Ministry of Agriculture/Institute of Agricultural Resources and RegionalPlanning,Chinese Academy of Agricultural Sciences,Beijing 100081,China;2.Dazhou Agricultural Research Institute,Dazhou,Sichuan 6350