{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T14:05:52Z","timestamp":1784642752705,"version":"3.55.0"},"reference-count":70,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2024,1,10]],"date-time":"2024-01-10T00:00:00Z","timestamp":1704844800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"University of Latvia"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Plants"],"abstract":"<jats:p>Mesembryanthemum crystallinum L. is an obligatory halophyte species showing optimum growth at elevated soil salinity levels, but the ionic requirements for growth stimulation are not known. The aim of the present study was to compare the effects of sodium, potassium and calcium in the form of chloride and nitrate salts on the growth, physiological performance, ion accumulation and mineral nutrition of M. crystallinum plants in controlled conditions. In a paradoxical way, while sodium and potassium had comparable stimulative effect on plant growth, the effect of calcium was strongly negative even at a relatively low concentration, eventually leading to plant death. Moreover, the effect of Ca nitrate was less negative in comparison to that of Ca chloride, but K in the form of nitrate had some negative effects. There were three components of the stimulation of biomass accumulation by NaCl and KCl salinity in M. crsytallinum: the increase in tissue water content, increase in ion accumulation, and growth activation. As optimum growth was in a salinity range from 20 to 100 mM, the increase in the dry biomass of plants at a moderate (200 mM) and high (400 mM) salinity in comparison to control plants was mostly due to ion accumulation. Among physiological indicators, changes in leaf chlorophyll concentration appeared relatively late, but the chlorophyll a fluorescence parameter, Performance Index Total, was the most sensitive to the effect of salts. In conclusion, both sodium and potassium in the form of chloride salts are efficient in promoting the optimum growth of M. crystallinum plants. However, mechanisms leading to the negative effect of calcium on plants need to be assessed further.<\/jats:p>","DOI":"10.3390\/plants13020190","type":"journal-article","created":{"date-parts":[[2024,1,10]],"date-time":"2024-01-10T09:39:57Z","timestamp":1704879597000},"page":"190","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Effect of Na, K and Ca Salts on Growth, Physiological Performance, Ion Accumulation and Mineral Nutrition of Mesembryanthemum crystallinum"],"prefix":"10.3390","volume":"13","author":[{"given":"Astra","family":"J\u0113kabsone","sequence":"first","affiliation":[{"name":"Department of Plant Physiology, Faculty of Biology, University of Latvia, 1 Jelgavas Str., LV-1004 R\u012bga, Latvia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andis","family":"Karlsons","sequence":"additional","affiliation":[{"name":"Institute of Biology, University of Latvia, 4 Oj\u0101ra V\u0101cie\u0161a Str., LV-1004 R\u012bga, Latvia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6355-7402","authenticated-orcid":false,"given":"Anita","family":"Osvalde","sequence":"additional","affiliation":[{"name":"Institute of Biology, University of Latvia, 4 Oj\u0101ra V\u0101cie\u0161a Str., LV-1004 R\u012bga, Latvia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5542-886X","authenticated-orcid":false,"given":"Gederts","family":"Ievinsh","sequence":"additional","affiliation":[{"name":"Department of Plant Physiology, Faculty of Biology, University of Latvia, 1 Jelgavas Str., LV-1004 R\u012bga, Latvia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,1,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"746","DOI":"10.3389\/fpls.2014.00746","article-title":"Biophysical and biochemical constraints imposed by salt stress: Learning from halophytes","volume":"5","author":"Duarte","year":"2014","journal-title":"Front. 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