Fig. 6.

The ultrastructure of root meristematic cells of the control Triticum aestivum plants after a 7-day hydroponic cultivation. The part of a cell with typical nucleolus containing two nucleoli and small electron-transparent vacuoles scattered in the cytoplasm (a). Mitochondria with low-density matrix and narrow cristae, a small plastid without starch, endoplasmic reticulum cisternae running in different directions and an electron-lucent vacuole (b). Mitochondria with numerous slightly widened cristae, a plastid with a starch grain, endoplasmic reticulum cisternae and a cell wall with visible plasmodesmata (c). Numerous active Golgi apparati with quite numerous vesicles, mitochondria with numerous slightly widened cristae, endoplasmic reticulum cisternae running in different directions (d). CW cell wall, ER endoplasmic reticulum, GA Golgi apparatus, M mitochondrium, N nucleus, Nu nucleolus, P plastid, S starch, V vacuole