DOI: 10.1111/j.1399-3054.1978.tb02549.x. Allosteric Regulation of Potassium Uptake in Plant Roots

Allosteric Regulation of Potassium Uptake in Plant Roots

10.1111/j.1399-3054.1978.tb02549.x

Crossref journal-article

Wiley

Physiologia Plantarum (311)

Abstract

AbstractIn uptake experiments from nutrient solutions containing 2.0 mMK+labelled with86Rb+, the relationship between potassium uptake efficiency and internal potassium concentration of the roots, [K+]iwas found to be partly sigmoidal for intact plants of spring wheat (Triticum aestivumL.), glasshouse cucumber (Cucumis sativusL.), birch (Betula verrucosaEhrh.), lingonberry (Vaccinium vitis‐idaeaL.), Scots pine (Pinus silvestrisL.) and Norway spruce (Picea abies(L.) Karst.), The results were interpreted in terms of sigmoidal enzyme kinetics for allosteric regulation. Hill plots of the data gave straight lines at specific [K+]iintervals for the species. The slopes of the lines are the Hill coefficient, which could be regarded as a measure of the minimal number of allosteric sites. The Hill coefficient varied between ‐ 14.4 and ‐ 15.9. When divided by four, these values are fairly consistent with those in the literature. It is suggested that four active uptake sites interact with four groups of allosteric sites, each group containing four such sites, or that one active uptake site interacts with all the allosteric sites. Thus the results are evidence that the mechanism regulating K+uptake is basically similar for the investigated plants. It is the interval of [K+]imediating highly negatively cooperative allosteric regulation that differs among species.For some of the species,ndecreased from about 15 and approached unity at high [K+]ivalues. This may indicate that only few sites are still available, making cooperativity unimportant. Alternatively high vacuolar [K+]iconcentrations may give rise to an incorrect evaluation of data from Hill plots, since the cytoplasmic K+content likely regulates the allosteric mechanism. Moreover, it is suggested that gene‐controlled carrier synthesis is responsible for the varying maximum K+uptake efficiency among species.

Bibliography

JENSÃN, P., & PETTERSSON, S. (1978). Allosteric Regulation of Potassium Uptake in Plant Roots. Physiologia Plantarum, 42(2), 207â213. Portico.

Authors 2

PAUL JENSÉN (first)
SUNE PETTERSSON (additional)

References 33 Referenced 79

10.1017/S0021859600033219
Clarkson D. T.&Sanderson J.1970.Relationship between the anatomy of cereal roots and the absorption of nutrients and water.Agric. Res. Counc. Letcombe Lab. Annu. Rep. Part II;16–25.
10.1038/220805a0
10.1128/br.21.3.169-194.1957
10.1016/0022-2836(75)90390-3
10.1093/jxb/24.2.328
10.1016/B978-0-12-734850-6.50015-0
{'key': 'e_1_2_1_9_1', 'first-page': '284', 'volume-title': 'Encyclopedia of Plant Physiology', 'author': 'Cram W. J.', 'year': '1976'} / Encyclopedia of Plant Physiology by Cram W. J. (1976)
10.1071/BI9730757 / Aust. J. Biol. Sci. / Chloride fluxes in cells of the isolated root cortex of Zea mays by Cram W. J. (1973)
10.1016/S0021-9258(20)82233-9 / J. Biol. Chem. / Characterization of a sulphate and a thiosulphate transporting system in Salmonella typhimurium by Dreyfuss J. (1964)
10.1128/jb.91.6.2275-2280.1966 / J. Bacteriol. / Regulation of sulphate transport in Salmonella typhimurium by Dreyfuss J. (1966)
{'key': 'e_1_2_1_13_1', 'first-page': '284', 'article-title': 'Selective ion transport in plants and its genetic control', 'volume': '942', 'author': 'Epstein E.', 'year': '1963', 'journal-title': 'Desalination Research Conference. National Academy of Sciences'} / Desalination Research Conference. National Academy of Sciences / Selective ion transport in plants and its genetic control by Epstein E. (1963)
10.1146/annurev.pp.15.060164.001125
10.1104/pp.56.3.377
{'key': 'e_1_2_1_16_1', 'first-page': '33', 'article-title': 'Regulation of potassium absorption in barley roots. An allosteric model', 'volume': '58', 'author': 'Glass A. D. M.', 'year': '1976', 'journal-title': 'Ibid'} / Ibid / Regulation of potassium absorption in barley roots. An allosteric model by Glass A. D. M. (1976)
10.1016/B978-0-12-734850-6.50017-4
10.1071/PP9770313
10.1016/0304-4165(66)90259-5
10.1111/j.1399-3054.1971.tb06728.x
{'key': 'e_1_2_1_21_1', 'first-page': '332', 'article-title': 'Mineral nutrient requirements of cucumber seedlings', 'volume': '25', 'author': 'Ingestad T.', 'year': '1972', 'journal-title': 'Ibid'} / Ibid / Mineral nutrient requirements of cucumber seedlings by Ingestad T. (1972)
{'key': 'e_1_2_1_22_1', 'first-page': '239', 'article-title': 'Mineral nutrient requirements of Vaccinium vitis‐idaea and V. myrtillus', 'volume': '29', 'author': 'Ingestad T.', 'year': '1973', 'journal-title': 'Ibid'} / Ibid / Mineral nutrient requirements of Vaccinium vitis‐idaea and V. myrtillus by Ingestad T. (1973)
{'key': 'e_1_2_1_23_1', 'first-page': '1', 'article-title': 'Effects of some internal and environmental factors on ion uptake efficiency in roots of pine seedlings', 'volume': '6', 'author': 'Jensén P.', 'year': '1977', 'journal-title': 'Technical Report, Swedish Coniferous Forest Project, Uppsala. Sweden'} / Technical Report, Swedish Coniferous Forest Project, Uppsala. Sweden / Effects of some internal and environmental factors on ion uptake efficiency in roots of pine seedlings by Jensén P. (1977)
10.1093/jxb/24.5.787
10.1016/S0022-2836(65)80285-6
10.1111/j.1399-3054.1977.tb04058.x
{'key': 'e_1_2_1_27_1', 'first-page': '14', 'article-title': 'Ion contents and fluxes in cell cultures of bush bean', 'volume': '59', 'author': 'Owens T.', 'year': '1977', 'journal-title': 'Plant Physiol. Suppl.'} / Plant Physiol. Suppl. / Ion contents and fluxes in cell cultures of bush bean by Owens T. (1977)
10.1111/j.1399-3054.1975.tb03837.x
10.1016/B978-0-12-058250-1.50048-8
10.1071/PP9750061
{'volume-title': 'How to Solve Mathe matical Problems in General Biochemistry', 'year': '1968', 'author': 'Segal I. H.', 'key': 'e_1_2_1_31_1'} / How to Solve Mathe matical Problems in General Biochemistry by Segal I. H. (1968)
{'volume-title': 'Physical Biochemistry', 'year': '1971', 'author': 'Holde K. E.', 'key': 'e_1_2_1_32_1'} / Physical Biochemistry by Holde K. E. (1971)
{'volume-title': 'Macromolecules: Structure and Function', 'year': '1971', 'author': 'Wold F.', 'key': 'e_1_2_1_33_1'} / Macromolecules: Structure and Function by Wold F. (1971)
Young M. Jefferies R. L.&Sims.A. P.1970.The regulation of potassium uptake in Lemna minor L.Abh. dtsch. Akad. Wiss. Berl.b.67–82. (10.1515/9783112748770-016)

Dates

Type	When
Created	19 years, 4 months ago (April 30, 2006, 3:10 p.m.)
Deposited	7 months, 3 weeks ago (Jan. 8, 2025, 2:36 p.m.)
Indexed	3 weeks, 6 days ago (Aug. 5, 2025, 8:38 a.m.)
Issued	47 years, 7 months ago (Feb. 1, 1978)
Published	47 years, 7 months ago (Feb. 1, 1978)
Published Online	19 years, 4 months ago (April 28, 2006)
Published Print	47 years, 7 months ago (Feb. 1, 1978)

Funders 0

None

BibTeX

@article{JENS_N_1978, title={Allosteric Regulation of Potassium Uptake in Plant Roots}, volume={42}, ISSN={1399-3054}, url={http://dx.doi.org/10.1111/j.1399-3054.1978.tb02549.x}, DOI={10.1111/j.1399-3054.1978.tb02549.x}, number={2}, journal={Physiologia Plantarum}, publisher={Wiley}, author={JENSÉN, PAUL and PETTERSSON, SUNE}, year={1978}, month=feb, pages={207–213} }

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