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Publication Type J
Authors Zheng, Q. S., L. Liu, Z. P. Liu, J. M. Chen and G. M. Zhao
Title Comparison of the response of ion distribution in the tissues and cells of the succulent plants Aloe vera and Salicornia europaea to saline stress
Source Journal of Plant Nutrition and Soil Science-Zeitschrift Fur Pflanzenernahrung Und Bodenkunde
Author Keywords NaCl stress seedlings growth ion homeostasis aqueous cells ion transport salt tolerance osmotic adjustment growth arabidopsis halophytes soil accumulation salinization adaptation nutrition
Abstract There exists a great variability among plant species regarding their sensitivity and resistance to high salinity in soil, and most often this variability is related with the ability of a particular plant species to regulate ion homeostasis and transport. In this study, we have investigated the effects of NaCl on growth rate, water status, and ion distribution in different cells and tissues of two succulent plants, Aloe vera and Salicornia europaea. Our results showed that the growth of A. vera seedlings was significantly decreased in response to salinity. However, the growth of S. europaea seedlings was greatly stimulated by high concentrations of NaCl. Under saline conditions, S. europaea seedlings maintained K(+) and Ca(2+) uptake in roots and showed a higher root-to-shoot flux of Na(+) and Cl(-) as compared to A. vera. Despite great accumulation of Na(+) and Cl(-) in photosynthetically active shoot cells in S. europaea, its growth was enhanced, indicating S. europaea is capable of compartmentalizing salt ions in the vacuoles of shoot cells. Aloe vera seedlings, however, showed a low transport rate of Na(+) and Cl(-) to leaves and suppressed uptake of K(+) and Ca(2+) in roots during NaCl treatment. Our results also implicate that A. vera may be able to accumulate Na(+) and Cl(-) in the metabolically inactive aqueous cells in leaves and, as a result, the plant can survive and can maintain growth under saline conditions.
Author Address [Zheng, Qingsong; Liu, Ling; Liu, Zhaopu; Chen, Jianmiao; Zhao, Gengmao] Nanjing Agr Univ, Coll Nat Resources & Environm Sci, Key Lab Marine Biol, Nanjing 210095, Jiangsu, Peoples R China. Liu, ZP (reprint author), Nanjing Agr Univ, Coll Nat Resources & Environm Sci, Key Lab Marine Biol, Nanjing 210095, Jiangsu, Peoples R China. sea@njau.edu.cn
ISSN 1436-8730
ISBN 1436-8730
29-Character Source Abbreviation J. Plant Nutr. Soil Sci.-Z. Pflanzenernahr. Bodenkd.
Publication Date Dec
Year Published 2009
Volume 172
Issue 6
Beginning Page 875-883
Digital Object Identifier (DOI) 10.1002/jpln.200900122
Unique Article Identifier WOS:000273185800016
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