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https://hdl.handle.net/2440/119407
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Type: | Journal article |
Title: | Osmotic adjustment and energy limitations to plant growth in saline soil |
Author: | Munns, R. Passioura, J.B. Colmer, T.D. Byrt, C.S. |
Citation: | New Phytologist, 2019; 225(3):1-6 |
Publisher: | John Wiley & Sons |
Issue Date: | 2019 |
ISSN: | 0028-646X 1469-8137 |
Statement of Responsibility: | Rana Munns, John B. Passioura, Timothy D. Colmer, Caitlin S. Byrt |
Abstract: | Plant roots must exclude almost all of the Na+ and Cl- in saline soil while taking up water, otherwise these ions would build up to high concentrations in leaves. Plants evaporate c. 50 times more water than they retain, so 98% exclusion would result in shoot NaCl concentrations equal to that of the external medium. Taking up just 2% of the NaCl allows a plant to osmotically adjust the Na+ and Cl- in vacuoles, while organic solutes provide the balancing osmotic pressure in the cytoplasm. We quantify the costs of this exclusion by roots, the regulation of Na+ and Cl- transport through the plant, and the costs of osmotic adjustment with organic solutes in roots. |
Keywords: | barley chloride salt sodium wheat xylem |
Rights: | © 2019 The Authors. New Phytologist © 2019 New Phytologist Trust |
DOI: | 10.1111/nph.15862 |
Grant ID: | http://purl.org/au-research/grants/arc/CE140100008 http://purl.org/au-research/grants/arc/IH140100013 |
Published version: | http://dx.doi.org/10.1111/nph.15862 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 8 |
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