Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) plants grown at various salinity level

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Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) plants grown at various salinity level. / Hariadi, Yuda; Marandon, Karl; Tian, Yu; Jacobsen, Sven-Erik; Shahala, Sergey.

In: Journal of Experimental Botany, Vol. 62, No. 1, 2011, p. 185-193.

Research output: Contribution to journalJournal articleResearchpeer-review

Harvard

Hariadi, Y, Marandon, K, Tian, Y, Jacobsen, S-E & Shahala, S 2011, 'Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) plants grown at various salinity level', Journal of Experimental Botany, vol. 62, no. 1, pp. 185-193. https://doi.org/10.1093/jxb/erq257

APA

Hariadi, Y., Marandon, K., Tian, Y., Jacobsen, S-E., & Shahala, S. (2011). Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) plants grown at various salinity level. Journal of Experimental Botany, 62(1), 185-193. https://doi.org/10.1093/jxb/erq257

Vancouver

Hariadi Y, Marandon K, Tian Y, Jacobsen S-E, Shahala S. Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) plants grown at various salinity level. Journal of Experimental Botany. 2011;62(1):185-193. https://doi.org/10.1093/jxb/erq257

Author

Hariadi, Yuda ; Marandon, Karl ; Tian, Yu ; Jacobsen, Sven-Erik ; Shahala, Sergey. / Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) plants grown at various salinity level. In: Journal of Experimental Botany. 2011 ; Vol. 62, No. 1. pp. 185-193.

Bibtex

@article{3f20dfb0ba6011df825b000ea68e967b,
title = "Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) plants grown at various salinity level",
abstract = "Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) were studied by exposing plants to six salinity levels (0–500 mM NaCl range) for 70 d. Salt stress was administered either by pre-mixing of the calculated amount of NaCl with the potting mix before seeds were planted or by the gradual increase of NaCl levels in the irrigation water. For both methods, the optimal plant growth and biomass was achieved between 100 mM and 200 mM NaCl, suggesting that quinoa possess a very efficient system to adjust osmotically for abrupt increases in NaCl stress. Up to 95{\%} of osmotic adjustment in old leaves and between 80{\%} and 85{\%} of osmotic adjustment in young leaves was achieved by means of accumulation of inorganic ions (Na+, K+, and Cl–) at these NaCl levels, whilst the contribution of organic osmolytes was very limited. Consistently higher K+ and lower Na+ levels were found in young, as compared with old leaves, for all salinity treatments. The shoot sap K+ progressively increased with increased salinity in old leaves; this is interpreted as evidence for the important role of free K+ in leaf osmotic adjustment under saline conditions. A 5-fold increase in salinity level (from 100 mM to 500 mM) resulted in only a 50{\%} increase in the sap Na+ content, suggesting either a very strict control of xylem Na+ loading or an efficient Na+ removal from leaves. A very strong correlation between NaCl-induced K+ and H+ fluxes was observed in quinoa root, suggesting that a rapid NaCl-induced activation of H+-ATPase is needed to restore otherwise depolarized membrane potential and prevent further K+ leak from the cytosol. Taken together, this work emphasizes the role of inorganic ions for osmotic adjustment in halophytes and calls for more in-depth studies of the mechanisms of vacuolar Na+ sequestration, control of Na+ and K+ xylem loading, and their transport to the shoot.",
keywords = "BRIC, Halophyte, Ion loading, Membrane transport, Osmotic adjustment, Potassium,, Salt stress, Sequestration, Sodium",
author = "Yuda Hariadi and Karl Marandon and Yu Tian and Sven-Erik Jacobsen and Sergey Shahala",
year = "2011",
doi = "10.1093/jxb/erq257",
language = "English",
volume = "62",
pages = "185--193",
journal = "Journal of Experimental Botany",
issn = "0022-0957",
publisher = "Oxford University Press",
number = "1",

}

RIS

TY - JOUR

T1 - Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) plants grown at various salinity level

AU - Hariadi, Yuda

AU - Marandon, Karl

AU - Tian, Yu

AU - Jacobsen, Sven-Erik

AU - Shahala, Sergey

PY - 2011

Y1 - 2011

N2 - Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) were studied by exposing plants to six salinity levels (0–500 mM NaCl range) for 70 d. Salt stress was administered either by pre-mixing of the calculated amount of NaCl with the potting mix before seeds were planted or by the gradual increase of NaCl levels in the irrigation water. For both methods, the optimal plant growth and biomass was achieved between 100 mM and 200 mM NaCl, suggesting that quinoa possess a very efficient system to adjust osmotically for abrupt increases in NaCl stress. Up to 95% of osmotic adjustment in old leaves and between 80% and 85% of osmotic adjustment in young leaves was achieved by means of accumulation of inorganic ions (Na+, K+, and Cl–) at these NaCl levels, whilst the contribution of organic osmolytes was very limited. Consistently higher K+ and lower Na+ levels were found in young, as compared with old leaves, for all salinity treatments. The shoot sap K+ progressively increased with increased salinity in old leaves; this is interpreted as evidence for the important role of free K+ in leaf osmotic adjustment under saline conditions. A 5-fold increase in salinity level (from 100 mM to 500 mM) resulted in only a 50% increase in the sap Na+ content, suggesting either a very strict control of xylem Na+ loading or an efficient Na+ removal from leaves. A very strong correlation between NaCl-induced K+ and H+ fluxes was observed in quinoa root, suggesting that a rapid NaCl-induced activation of H+-ATPase is needed to restore otherwise depolarized membrane potential and prevent further K+ leak from the cytosol. Taken together, this work emphasizes the role of inorganic ions for osmotic adjustment in halophytes and calls for more in-depth studies of the mechanisms of vacuolar Na+ sequestration, control of Na+ and K+ xylem loading, and their transport to the shoot.

AB - Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) were studied by exposing plants to six salinity levels (0–500 mM NaCl range) for 70 d. Salt stress was administered either by pre-mixing of the calculated amount of NaCl with the potting mix before seeds were planted or by the gradual increase of NaCl levels in the irrigation water. For both methods, the optimal plant growth and biomass was achieved between 100 mM and 200 mM NaCl, suggesting that quinoa possess a very efficient system to adjust osmotically for abrupt increases in NaCl stress. Up to 95% of osmotic adjustment in old leaves and between 80% and 85% of osmotic adjustment in young leaves was achieved by means of accumulation of inorganic ions (Na+, K+, and Cl–) at these NaCl levels, whilst the contribution of organic osmolytes was very limited. Consistently higher K+ and lower Na+ levels were found in young, as compared with old leaves, for all salinity treatments. The shoot sap K+ progressively increased with increased salinity in old leaves; this is interpreted as evidence for the important role of free K+ in leaf osmotic adjustment under saline conditions. A 5-fold increase in salinity level (from 100 mM to 500 mM) resulted in only a 50% increase in the sap Na+ content, suggesting either a very strict control of xylem Na+ loading or an efficient Na+ removal from leaves. A very strong correlation between NaCl-induced K+ and H+ fluxes was observed in quinoa root, suggesting that a rapid NaCl-induced activation of H+-ATPase is needed to restore otherwise depolarized membrane potential and prevent further K+ leak from the cytosol. Taken together, this work emphasizes the role of inorganic ions for osmotic adjustment in halophytes and calls for more in-depth studies of the mechanisms of vacuolar Na+ sequestration, control of Na+ and K+ xylem loading, and their transport to the shoot.

KW - BRIC

KW - Halophyte

KW - Ion loading

KW - Membrane transport

KW - Osmotic adjustment

KW - Potassium,

KW - Salt stress

KW - Sequestration

KW - Sodium

U2 - 10.1093/jxb/erq257

DO - 10.1093/jxb/erq257

M3 - Journal article

VL - 62

SP - 185

EP - 193

JO - Journal of Experimental Botany

JF - Journal of Experimental Botany

SN - 0022-0957

IS - 1

ER -

ID: 21857855