Salt tolerance in Suaeda maritima (l.) dum. fine structure and ion concentrations in the apical region of roots

Hajibagheri, M A, Yeo, A R and Flowers, T J (1985) Salt tolerance in Suaeda maritima (l.) dum. fine structure and ion concentrations in the apical region of roots. New Phytologist, 99 (3). pp. 331-343. ISSN 0028-646X

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Abstract

Anatomy and ion concentrations have been studied in the roots of the halophyte Suaeda maritima (L.)Dum. growing in saline and non-saline conditions. The roots were fine with only three layers of cortical cells. Salinization of the growth medium resulted in cellular vacuolation commencing closer to the apex than in non-salinized plants and led to an increase in root dimensions through increased cell (vacuole) size but not increased cell numbers: the Casparian strip developed much closer to the apex and was twice as long in salt-grown plants. Ion concentrations were determined in sections (1 mm) of root. The apical 1 mm was predominantly non-vacuolate, with a K+ concentration greater than 100 mol m−3 and a Na: K ratio less than 2, even when growing in 340 mol m−3 NaCl. The adaptive value of the anatomical observations are discussed and the ion concentration data assessed in relation to current concepts of the haiophyte cell.

Item Type: Article
Additional Information: Times Cited: 44 Hajibagheri, ma yeo, ar flowers, tj
Keywords: Salt-tolerance, halophyte, Suaeda maritima, ultrastructure, ion concentrations
Schools and Departments: School of Life Sciences > Evolution, Behaviour and Environment
Subjects: Q Science
Depositing User: Catrina Hey
Date Deposited: 15 May 2012 09:16
Last Modified: 15 May 2012 09:16
URI: http://srodev.sussex.ac.uk/id/eprint/39153
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