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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
Statement of
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
Rights: © 2019 The Authors. New Phytologist © 2019 New Phytologist Trust
DOI: 10.1111/nph.15862
Grant ID:
Appears in Collections:Agriculture, Food and Wine publications
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