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Effect of KNO2 treatment and EL5 function on phytohormone contents. Roots were grown for 4 days without nitrogen sources and then treated with 1mM KNO2 for 6h. The contents of tZ, iP, ABA, IAA, JA, JA-Ile, and SA in whole roots are presented. Error bars indicate SD. Different letters above the bars indicate significant differences at P < 0.05 (n = 8–15 independent treatments; Tukey–Kramer test). DW, dry weight; NT, non-transformants; mEL5, transgenic rice plants overexpressing EL5V162A.
