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Publication Type J
Authors Ramadan T
Title Eco-physiological relevance of potassium recretion by the salt glands of Limoniastrum monopetalum (L.) Boiss
Source Egyptian Journal of Botany
Author Keywords Dicotyledones, Angiospermae, Spermatophyta, Plantae Angiosperms, Dicots, Plants, Spermatophytes, Vascular Plants Plumbaginaceae [26585] [Limoniastrum monopetalum]
Abstract FLUCTUATION in rates of transpiration and potassium (K) recretion from leaves of L. monopetalum (Plumbaginaceae) were investigated in summer (Su) and winter (Wi) under field conditions. The diurnal recretion pattern, which gradually decreased toward midday, showed a negative correlation with the daily transpiration pattern. The "relative recretion" was higher in withan in Su. All values of relative recretion were less than unity, indicating that K has a high affinity for accumulation within the leaves. Although the concentration of K in soil solutions at root environment are higher in the dry season, values of absolute recretion were low. The plant roots prevent about 93% (in Su) and 81% (in Wi) of soil solution salts from entering the plant. The leaves recrete 25% and 37% of the absorbed K in Su and Wi, respectively. The study indicated that the increasing transpiration and retained ions during the daytime develop the osmotic potential and act as the driving force for the ultrafiltr ation system at the root level.
Author Address Ramadan, T.; Department of Botany, Faculty of Science, Assiut University, Assiut, Egypt
Publisher Eco-physiological relevance of potassium recretion by the salt glands of Limoniastrum monopetalum (L.) Boiss
ISSN 1011-3835
ISBN 1011-3835
Publication Date 1997(1999)
Year Published 1997
Volume 37
Issue 1
Beginning Page 1
Ending Page 12
Unique Article Identifier BCI:BCI200000023902
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