Fig. 3.
AtTCTP loss of function affects cell division. (A) RNAi-AtTCTP plants exhibit severe dwarf phenotype compared with WT plants. (B) Inflorescence stem cell length measurements show no significant difference in medullar parenchyma cell length between WT and RNAi-AtTCTP (n = 120). (C and D) A significant decrease of leaf epidermal cell density (C) and conical petal cell density (D) is observed in RNAi-AtTCTP plants compared with the WT. Asterisks indicate significant differences with PStudent < 0.001. (E) Surface area measurements of WT and RNAi-AtTCTP petals show no significant change of petal size (n = 30). (F–I) Kinematic analysis of leaf growth performed on the first leaf pair of RNAi-AtTCTP and WT. Average of leaf blade area (F), cell area (G), cell numbers (H), and cell division rate (I) are presented. A linear scaled graph of leaf blade area is inserted in F. Note that leaves are twofold smaller in the RNAi-AtTCTP line compared with the WT.