FACE条件下臭氧浓度升高对不同筋型小麦籽粒品质的影响OA北大核心CSTPCD

To investigate the response of wheat grain quality with different gluten types to elevated tropospheric ozone(O3),13 wheat(Triticum aestivum L.)cultivars(4 strong-gluten varieties,5 medium-gluten varieties,4 weak-gluten varieties)in 2021 and 12 cultivars(4 strong-gluten varieties,6 medium-gluten varieties,2 weak-gluten varieties)in 2022 were grown in the Free-Air O3 Concentration Enrichment system(O3-FACE).Two O3 treatments:ambient air(AA)and elevated O3(1.5×ambient O3 concentration,E-O3)were used to study differences in the responses of wheat gluten types to elevated O3.The results showed that E-O3 significantly increased the Ca element content by 24.8%in 2021,and the amylose content significantly decreased by 8.1%in 2022.There were significant differences in the grain quality of different wheat gluten types in response to E-O3.Strong-and medium-gluten wheat showed a significant decrease of 8.6%and 7.6%in amylose content in 2022,while Ca element content increased significantly by 24.7%and 27.2%in 2021,respectively.Weak-gluten wheat showed a significant decrease of 6.7%in starch content in 2021,with a larger increase in protein content over the past two years compared to medium-and strong-gluten wheat.According to the quality standards of wheat grains with different gluten types,E-O3 will be beneficial for the formation of grain quality in medium-and strong-gluten wheat,but is not conducive to the formation of grain quality in weak-gluten wheat.In summary,E-O3 has a significant impact on all tested wheat cultivars,in which Ningmai 13,Yangmai 33,and Yangmai 22 are sensitive to O3.