The responses and their physio-ecological bases of spring wheat to limited irrigation in Loess Plateau Modulation of Root Signals in Relation to Stomatal Sensitivity to Root-sourced Abscisic Acid in Drought-affected Plants Effects of Root Pruning and Shoot Pruning on Water Use Efficiency of AppleLeaves Effects of Root Pruning and Shoot Pruning on Water Use Efficiency of AppleLeaves Effect of topsoil drought and root signals on yield formation of spring wheat THE EFFECT OF SOIL WATER DEFICIENCY ON THE ACCUMULATION AND ALLOCATION OF ROOT BIOMASS OF SPRING WHEAT A discussion on the non-hydraulic root-sourced signals and life history strategy of wheat crops Effects of arbuscular mycorrhizal fungi and plant symbiosis on plant water relation and its mechanism