PLANT CELL GROWTH AND NUTRITION 



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Figure 8. Comparison ot cells in their resting and activated states. A: 

 Phloem parenchyma of carrot root. B: Starch-filled cells of potato tuber. 

 C: Cells from pulp of the har\'ested but unripe banana fruit. D: Same as A, 

 after culturing in a basal liquid medium with coconut milk. E: Cultured cells 

 of potato tuber showing granular inclusions surrounding the nuclei. F: Cul- 

 tured cell of banana. (Note prominent cytoplasmic strands in D and E. Cells 

 in E and F were grown in a liquid medium containing coconut milk and 

 2,4-D.) 



endoplasmatic reticulum), their later withdrawal into the cytoplasm 

 may be achieved by some phenomenon analogous to pinocytosis. 



The cell as a working machine. Thus the great need now, in the 

 interpretation of salt accumulation in cells, is not for more sophisti- 

 cated schemata based on outmoded concepts of cells but for more 

 direct observational data which will relate cells as integrated working 



