Ca 2+ and Mg 2+ ‐Stimulated ATPases from Roots of Plantago lanceolata, Plantago media and Plantago coronopus : Response to Alterations of the Level of Mineral Nutrition and Ecological Significance

Ca 2+ and Mg 2+ ‐Stimulated ATPases from Roots of Plantago lanceolata, Plantago media and... Growth of Plantago lanceolata L., P. media L. and P. coronopus L. was followed at two levels of mineral nutrition (low‐salt and high‐salt). In addition the response of transfer of plants from low‐salt conditions to high‐salt conditions and vice versa was studied. Growth of these Plantago species was not much affected by the nutritional level. P. coronopus showed the least dependence on the level of mineral nutrition. The Ca2+‐ and Mg2+‐stimulated ATPase activity of microsomal preparations of the roots of Plantago was also studied. A pH optimum at pH 6.5 was observed in all species, together with a relatively high ATPase activation by Mg2+ in P. lanceolata, by Ca2+ in P. media, and by both ions in P. coronopus. The specific activity of the ATPases was highest in preparations from low‐salt roots. The three species all occur in relatively nutrient‐poor habitats, but they are at the same time particularly adapted to circumneutral soils (P. lanceolata), to Ca2+‐rich soils (P. media) and to alternating levels of mineral nutrition (P. coronopus). The properties of the ATPases (Km, Vmax, protein content) and the growth are discussed in relation to these ecological properties of the species. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physiologia Plantarum Wiley

Ca 2+ and Mg 2+ ‐Stimulated ATPases from Roots of Plantago lanceolata, Plantago media and Plantago coronopus : Response to Alterations of the Level of Mineral Nutrition and Ecological Significance

Physiologia Plantarum, Volume 45 (2) – Feb 1, 1979

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Publisher
Wiley
Copyright
Copyright © 1979 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0031-9317
eISSN
1399-3054
DOI
10.1111/j.1399-3054.1979.tb01694.x
Publisher site
See Article on Publisher Site

Abstract

Growth of Plantago lanceolata L., P. media L. and P. coronopus L. was followed at two levels of mineral nutrition (low‐salt and high‐salt). In addition the response of transfer of plants from low‐salt conditions to high‐salt conditions and vice versa was studied. Growth of these Plantago species was not much affected by the nutritional level. P. coronopus showed the least dependence on the level of mineral nutrition. The Ca2+‐ and Mg2+‐stimulated ATPase activity of microsomal preparations of the roots of Plantago was also studied. A pH optimum at pH 6.5 was observed in all species, together with a relatively high ATPase activation by Mg2+ in P. lanceolata, by Ca2+ in P. media, and by both ions in P. coronopus. The specific activity of the ATPases was highest in preparations from low‐salt roots. The three species all occur in relatively nutrient‐poor habitats, but they are at the same time particularly adapted to circumneutral soils (P. lanceolata), to Ca2+‐rich soils (P. media) and to alternating levels of mineral nutrition (P. coronopus). The properties of the ATPases (Km, Vmax, protein content) and the growth are discussed in relation to these ecological properties of the species.

Journal

Physiologia PlantarumWiley

Published: Feb 1, 1979

References

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