Effects of Elevated Surface Ozone Stress on Grain Quality in Winter Wheat

To in-depth understand the injury of increased ozone concentration at surface to grain quality of winter wheat,the Open-Top Chambe(rOTC)was used to make field experiment in Nanjing area,which were designed to CF100 and CF150,controlled by 100 nL·L-1 and 150nL·L-1 in daytime during whole fumigating periods,and control (CK)by unfiltered air,respectively.The results of indoor experiments for the grain quality in winter wheat showed that there were significant differences among the treatments in contents of grain protein components and amino acid components:(1)The size order of total amino acids of grain was CF100 CF150 CK,but the essential amino acids was CF150 CF100 CK.It was significant difference between the three treatments (P0.05)(.2)The crude protein contents in winter wheat was increasing with the increase of ozone concentrations,but there were different variation trends for their compositions,among which the size order of albumin and globulin contents were CF150 CF100 CK,prolamin and glutenin content were CF100 CF150 CK(.3)Starch contents was decreased with the increasing of the ozone concentration,with significant negative correlation.The starch contents of winter wheat in CF100 and CF150 declined by 4.06% and 16.61%,compared with CK,respectively.On the whole,ozone stress on winter wheat was conducive to the nutritional quality of grain,improved processing quality.