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      Na+ Tolerance and Na+ Transport in Higher Plants

      Annals of Botany

      Oxford University Press (OUP)

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          Abstract

          Tolerance to high soil [Na(+)] involves processes in many different parts of the plant, and is manifested in a wide range of specializations at disparate levels of organization, such as gross morphology, membrane transport, biochemistry and gene transcription. Multiple adaptations to high [Na(+)] operate concurrently within a particular plant, and mechanisms of tolerance show large taxonomic variation. These mechanisms can occur in all cells within the plant, or can occur in specific cell types, reflecting adaptations at two major levels of organization: those that confer tolerance to individual cells, and those that contribute to tolerance not of cells per se, but of the whole plant. Salt-tolerant cells can contribute to salt tolerance of plants; but we suggest that equally important in a wide range of conditions are processes involving the management of Na(+) movements within the plant. These require specific cell types in specific locations within the plant catalysing transport in a coordinated manner. For further understanding of whole plant tolerance, we require more knowledge of cell-specific transport processes and the consequences of manipulation of transporters and signalling elements in specific cell types.

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          Author and article information

          Journal
          Annals of Botany
          Oxford University Press (OUP)
          03057364
          10958290
          February 6 2003
          April 1 2003
          : 91
          : 5
          : 503-527
          Article
          10.1093/aob/mcg058
          4242248
          12646496
          © 2003

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