The non-sequential senescence of wheat leaves refers to the aging of the flag leaves earlier than the inverted two leaves at the late stage of grain filling.The senescence method can transport the nutrients to the grain quickly and increase the spike weight and 1000-grain weight.It can be used as one of the traits for breeding high-yield,tolerant wheat varieties.This paper mainly studied the changes of water content,soluble sugar,starch,proline and soluble protein in stems-sheaths and roots during the overw...