Soil water deficit resulted in the content of nitrogen,phosphorus,and iPAs declined while of ABA improves,and had effects on floret differentiation and development.As a result,the fructiferous grains decreased.Under adequate water condition,there was no remarkable difference of the content of nitrigen,phosphorus,iPAs,and ABA in spike among different drought enduring wheat cultivars.Under water stress condition,both the declined range of the content of nitrogen,phosphorus,and iPAs and the improved range of ...