Registration Dossier

Administrative data

Endpoint:
biotransformation and kinetics
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Referenceopen allclose all

Reference Type:
review article or handbook
Title:
Potash facts
Author:
Gething, P.A.
Year:
1991
Bibliographic source:
International Potash Institute (IPI), Basel.
Reference Type:
study report
Title:
Unnamed
Year:
1995

Materials and methods

Principles of method if other than guideline:
Biotransformation and kinetics of potassium as one of the three major plant nutrients
GLP compliance:
not specified
Type of medium:
plant

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Any other information on results incl. tables

Biotransformation and kinetics of potassium asone of the three major plant nutrients, is well reviewed:

 

Uptake of K in plants is highly selective and closely coupled to metabolic activity. It is characterized by high mobility in plants at alllevels, within individual cells, within tissues,and in long-distance transport via the xylem andphloem. K is the most abundant cation in the

cytoplasm and its accompanying anions make amajor contribution to the osmotic potential of

cells. K is not metabolized and it forms only weak complexes in which it is readily exchangeable.

Applicant's summary and conclusion

Conclusions:
Biotransformation and kinetics of potassium as one of the three major plant nutrients, is well reviewed:

Uptake of K in plants is highly selective and closely coupled to metabolic activity. It is characterized by high mobility in plants at all levels, within individual cells, within tissues, and in long-distance transport via the xylem and phloem. K is the most abundant cation in the
cytoplasm and its accompanying anions make a major contribution to the osmotic potential of
cells. K is not metabolized and it forms only weak complexes in which it is readily exchangeable.
Executive summary:

Biotransformation and kinetics of potassium as one of the three major plant nutrients, is well reviewed:

Uptake of K in plants is highly selective and closely coupled to metabolic activity. It is characterized by high mobility in plants at all levels, within individual cells, within tissues, and in long-distance transport via the xylem and phloem. K is the most abundant cation in the cytoplasm and its accompanying anions make a major contribution to the osmotic potential of cells. K is not metabolized and it forms only weak complexes in which it is readily exchangeable.