Fig. 1From: Embryological observations on seed abortion in Hibiscus syriacus L. and physiological studies on nutrients, enzyme activity and endogenous hormonesStaining of H. syriacus pollen grains with iodine-potassium iodide (a) and variation in pollen activity over the course of the day of anthesis (b). Bars and error bars indicate the mean ± standard errors (n = 5). Different lowercase letters above bars indicate a significant difference between time points. In SPSS 26.0 followed by the Duncan’s test (p < 0.05)Back to article page