The effect of shoot-root ratio and temperature on K+ influx in rye

The temperature sensitivity of K⁺ influx into rye roots and root plasma membrane ATPase activity were compared in plants grown at different temperatures. It was shown that ATPase activity obeyed the Arrhenius relationship with temperature, whereas K⁺ influx into intact plants was linearly related to...

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Veröffentlicht in:	Plant and soil 1988-10, Vol.111 (2), p.245-248
Hauptverfasser:	White, P.J. (Edinburgh Univ. (UK). Dept. of Botany), Earnshaw, M.J, Clarkson, D.T
Format:	Artikel
Sprache:	eng
Schlagworte:	Absorption. Translocation of ions and substances. Permeability Acclimatization ADENOSINA TRIFOSFATASA ADENOSINE TRIPHOSPHATASE Adenosine triphosphatases Agronomy. Soil science and plant productions Biological and medical sciences Cell membranes ECHANGE D'ION Economic plant physiology Fundamental and applied biological sciences. Psychology INTERCAMBIO IONICO ION EXCHANGE Low temperature Nutrition. Photosynthesis. Respiration. Metabolism Plant roots Plants Plasma temperature POTASIO POTASSIUM RACINE RAICES ROOTS Rye SECALE CEREALE STEMS TALLO TEMPERATURA TEMPERATURE Temperature dependence TIGE
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Zusammenfassung:	The temperature sensitivity of K⁺ influx into rye roots and root plasma membrane ATPase activity were compared in plants grown at different temperatures. It was shown that ATPase activity obeyed the Arrhenius relationship with temperature, whereas K⁺ influx into intact plants was linearly related to temperature and markedly influenced by shoot/root ratio. A model for acclimation of K⁺ influx to low temperatures based on the regulation of the K⁺ carrier mechanism by plant 'demand' for K⁺ is described.
ISSN:	0032-079X 1573-5036
DOI:	10.1007/BF02139947