Dipotassium oxide

Biotransformation and kinetics

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

Reference

Reference 1

Reference Type:

review article or handbook

Title:

Potash facts

Author:

Gething, P.A.

Year:

1991

Bibliographic source:

International Potash Institute (IPI), Basel.

Reference 2

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

Test material information

Constituent 1

Reference substance name:

Dipotassium oxide

EC Number:

235-227-6

EC Name:

Dipotassium oxide

Cas Number:

12136-45-7

Molecular formula:

K2O

IUPAC Name:

Potassium oxide

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.