246 Mineral Nutrition of Plants 



other part. The concentration pattern for inorganic solutes generally 

 is in accord with the idea of a relationship between rates of accumula- 

 tion and metabolism. It should be sufficient to indicate here that 

 metabolic accumulations usually occur in growing parts of shoots, in 

 young leaves, in immature fruits, and seeds. 



SUMMARY 



Inorganic solute accumulation in roots is a process characteristic of 

 plant cells which are situated in favorable environments. Like all phy- 

 siological processes, the rates of accumulation are altered by external 

 and internal conditions and the concurrent rates of certain related 

 processes. The qualitative and quantitative limits for any particular 

 process (here, especially inorganic solute accumulation) are controlled 

 by the genetic potentialities of the specific physico-chemical species. 



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