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Einfluß von Wasserstreß auf die Aktivität der Phosphoenolpyruvat-Carboxylase bei Mesembryanthemum crystallinum (L.)

Effect of water stress on phosphoenolpyruvate carboxylase activity in Mesembryanthemum crystallinum (L.)

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Summary

Four-and-a-half-week-old plants of Mesembryanthemum crystallinum (L.) were transferred to cooled nutrient solution or to nutrient solution of low oxygen content. These stress treatments are known to reduce the absorption of water by plants. Examination of the second foliar leaves showed that the stress treatments result in a malate accumulation in the leaf mesophyll during the night which is paralleled by a drastically increased activity of phosphoenolpyruvate carboxylase. The results are discussed in relation to alterations of leaf growth, leaf water content and leaf water saturation deficit of the plants treated as described.

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Abbreviations

CAM:

Crassulacean Acid Metabolism

TG:

Trockengewicht

WSD:

Wassersättigungsdefizit

D:

Ende Dunkelphase

L:

Ende Lichtphase

Bicin:

N,N-Bis(2-hydroxyäthyl)-glycin

MDH:

Malatdehydrogenase

MES:

2-Morpholinoäthansulfonsäure

PEP:

Phosphoenolpyruvat

PVP:

Polyvinylpyrrolidon

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Authors and Affiliations

  1. Fachbe reich Biologie der Technischen Hochschule Darmstadt, Schnittspahnstr. 3-5, D-6100, Darmstadt, Federal Republic of Germany

    Klaus Winter

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  1. Klaus Winter
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Winter, K. Einfluß von Wasserstreß auf die Aktivität der Phosphoenolpyruvat-Carboxylase bei Mesembryanthemum crystallinum (L.). Planta 121, 147–153 (1974). https://doi.org/10.1007/BF00388753

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  • DOI: https://doi.org/10.1007/BF00388753

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