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Cited by 1,295

The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.

The Putative Plasma Membrane Na + /H + Antiporter SOS1 Controls Long-Distance Na + Transport in Plants

Open access
Shi, Huazhong, Quintero, Francisco J., Pardo, Jose M., Zhu, Jian-Kang·2002·The Plant Cell
DOI 10.1105/tpc.010371
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Abstract

The salt tolerance locus SOS1 from Arabidopsis has been shown to encode a putative plasma membrane Na(+)/H(+) antiporter. In this study, we examined the tissue-specific pattern of gene expression as well as the Na(+) transport activity and subcellular localization of SOS1. When expressed in a yeast mutant deficient in endogenous Na(+) transporters, SOS1 was able to reduce Na(+) accumulation and improve salt tolerance of the mutant cells. Confocal imaging of a SOS1-green fluorescent protein fusion protein in transgenic Arabidopsis plants indicated that SOS1 is localized in the plasma membrane. Analysis of SOS1 promoter-beta-glucuronidase transgenic Arabidopsis plants revealed preferential expression of SOS1 in epidermal cells at the root tip and in parenchyma cells at the xylem/symplast boundary of roots, stems, and leaves. Under mild salt stress (25 mM NaCl), sos1 mutant shoot accumulated less Na(+) than did the wild-type shoot. However, under severe salt stress (100 mM NaCl), sos1 mutant plants accumulated more Na(+) than did the wild type. There also was greater Na(+) content in the xylem sap of sos1 mutant plants exposed to 100 mM NaCl. These results suggest that SOS1 is critical for controlling long-distance Na(+) transport from root to shoot. We present a model in which SOS1 functions in retrieving Na(+) from the xylem stream under severe salt stress, whereas under mild salt stress it may function in loading Na(+) into the xylem.

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Metadata

Authors
Shi, H., Quintero, F. J., Pardo, J. M., & Zhu, J.-K.
Venue
The Plant Cell
Publisher
Oxford University Press (OUP)
Published
2002-02
Volume
14
Issue
2
Pages
465-477
ISSN
  • 1040-4651 (ISSN-L)
  • 1532-298X
DOI
10.1105/tpc.010371
OpenAlex
W2135018494
Cited by
1,295
References
36
FWCI
29.03
Type
journal article
Language
en
Open access
green

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