Analysis of yield-related parameters in MMP1 and wild-type (WT) plants. A, Total seed yield per MMP1 or wild-type plant. B, Average single seed weight from eight plants. C, Total number of seeds per plant. D, Total seed S yield per plant. E, Total seed N yield per plant. F, Total seed protein yield per plant. Results are presented as means ± sd. Asterisks indicate significant differences from the wild type detected by Student’s t test (n = 8): * P < 0.05, ** P < 0.01, *** P < 0.001.