《Table 2 Leaf anatomical structure in 90-21-3 and D937 grown under control and potassium deficient c

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《"Effects of potassium deficiency on photosynthesis,chloroplast ultrastructure,ROS,and antioxidant activities in maize(Zea mays L.)"》

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Values are expressed as mean±SE with 25 replicates.Within a row，values followed by different letters are significantly different（P<0.05），determined by LSD.

The leaf anatomical structure in 90-21-3 and D937 were clearly visible in Fig.1，including upper epidermis cells，lower epidermis cells，vascular bundles and xylem vessels.Compared with the controls，the thickness of leaf was significantly decreased by 5.21%in D937 under K deficiency treatment，but was not significantly different in 90-21-3（Table 2）.Both varieties were decreased in upper epidermis thickness and mesophyll cells，with significant decreases of 15.34 and 7.5%，respectively，in D937.There was no difference in distance between bundles.The Kranz area and xylem vessel area were not significantly different from controls under K deficiency although they were slightly decreased by 5.54 and 12.90%，respectively，in 90-21-3，and by 8.09 and 13.57%，respectively，in D937.The vascular bundle area，and xylem vessel number and area in 90-21-3 were significantly higher than those in D937under K deficiency.