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Mathias Neumann Andersen

Ionic and photosynthetic homeostasis in quinoa challenged by drought and salinity – mechanisms of tolerance

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Ionic and photosynthetic homeostasis in quinoa challenged by drought and salinity – mechanisms of tolerance. / Razzaghi, Fatemeh; Jacobsen, Sven-Erik; Jensen, Christian Richardt; Andersen, Mathias Neumann.

In: Functional Plant Biology, Vol. 42, No. 2, 2015, p. 136-148.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Razzaghi, F, Jacobsen, S-E, Jensen, CR & Andersen, MN 2015, 'Ionic and photosynthetic homeostasis in quinoa challenged by drought and salinity – mechanisms of tolerance', Functional Plant Biology, vol. 42, no. 2, pp. 136-148. https://doi.org/10.1071/fp14132

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Author

Razzaghi, Fatemeh ; Jacobsen, Sven-Erik ; Jensen, Christian Richardt ; Andersen, Mathias Neumann. / Ionic and photosynthetic homeostasis in quinoa challenged by drought and salinity – mechanisms of tolerance. In: Functional Plant Biology. 2015 ; Vol. 42, No. 2. pp. 136-148.

Bibtex

@article{d5149530c7b44bb78e9c8a9782bc5043,
title = "Ionic and photosynthetic homeostasis in quinoa challenged by drought and salinity – mechanisms of tolerance",
abstract = "Quinoa (Chenopodium quinoa Willd.) grown under field conditions was exposed to five irrigation water salinities (0, 10, 20, 30 and 40 dS m–1; 4 : 1 NaCl : CaCl2 molar ratio) from flowering, and divided between full irrigation and progressive drought (PD) during seed filling. Quinoa demonstrated homeostatic mechanisms which contributed to quinoa{\textquoteright}s extraordinary tolerance. Salinity increased K+ and Na+ uptake by 60 and 100 kg ha–1, respectively, resulting in maintenance of cell turgor by osmotic adjustment, and a 50% increase of the leaf{\textquoteright}s fresh weight (FW) : dry weight (DW) ratio and non-significant increase in elasticity enhanced crop water-capacitance. Day respiration (Rd) increased 2.7 times at high salinity but decreased 0.6 times during drought compared with control. Mesophyll conductance (gm) tended to be negatively affected by salinity as the increased succulence (FW : DW) possibly decreased intercellular space and increased cell-wall thickness. However, the increased K+ uptake seemed to alleviate biochemical limitations, as maximum Rubisco carboxylation rate (Vcmax) and photosynthetic electron transport (J) tended to increase under salinity. Overall, salinity and PD restricted stomatal conductance (gs) and photosynthesis (An) moderately, leading to decreased leaf internal to ambient [CO2], increase of intrinsic-water-use-efficiency (An/gs). The saturated electrical conductivity (ECe) resulting in 50% yield was estimated to be 25 dS m–1, reaching no yield at 51.5 dS m–1.",
keywords = "intrinsic water use efficiency, ion uptake, mesophyll conductance, salinity threshold value, Stomatal conductance",
author = "Fatemeh Razzaghi and Sven-Erik Jacobsen and Jensen, {Christian Richardt} and Andersen, {Mathias Neumann}",
year = "2015",
doi = "10.1071/fp14132",
language = "English",
volume = "42",
pages = "136--148",
journal = "Functional Plant Biology",
issn = "1445-4408",
publisher = "C S I R O Publishing",
number = "2",

}

RIS

TY - JOUR

T1 - Ionic and photosynthetic homeostasis in quinoa challenged by drought and salinity – mechanisms of tolerance

AU - Razzaghi, Fatemeh

AU - Jacobsen, Sven-Erik

AU - Jensen, Christian Richardt

AU - Andersen, Mathias Neumann

PY - 2015

Y1 - 2015

N2 - Quinoa (Chenopodium quinoa Willd.) grown under field conditions was exposed to five irrigation water salinities (0, 10, 20, 30 and 40 dS m–1; 4 : 1 NaCl : CaCl2 molar ratio) from flowering, and divided between full irrigation and progressive drought (PD) during seed filling. Quinoa demonstrated homeostatic mechanisms which contributed to quinoa’s extraordinary tolerance. Salinity increased K+ and Na+ uptake by 60 and 100 kg ha–1, respectively, resulting in maintenance of cell turgor by osmotic adjustment, and a 50% increase of the leaf’s fresh weight (FW) : dry weight (DW) ratio and non-significant increase in elasticity enhanced crop water-capacitance. Day respiration (Rd) increased 2.7 times at high salinity but decreased 0.6 times during drought compared with control. Mesophyll conductance (gm) tended to be negatively affected by salinity as the increased succulence (FW : DW) possibly decreased intercellular space and increased cell-wall thickness. However, the increased K+ uptake seemed to alleviate biochemical limitations, as maximum Rubisco carboxylation rate (Vcmax) and photosynthetic electron transport (J) tended to increase under salinity. Overall, salinity and PD restricted stomatal conductance (gs) and photosynthesis (An) moderately, leading to decreased leaf internal to ambient [CO2], increase of intrinsic-water-use-efficiency (An/gs). The saturated electrical conductivity (ECe) resulting in 50% yield was estimated to be 25 dS m–1, reaching no yield at 51.5 dS m–1.

AB - Quinoa (Chenopodium quinoa Willd.) grown under field conditions was exposed to five irrigation water salinities (0, 10, 20, 30 and 40 dS m–1; 4 : 1 NaCl : CaCl2 molar ratio) from flowering, and divided between full irrigation and progressive drought (PD) during seed filling. Quinoa demonstrated homeostatic mechanisms which contributed to quinoa’s extraordinary tolerance. Salinity increased K+ and Na+ uptake by 60 and 100 kg ha–1, respectively, resulting in maintenance of cell turgor by osmotic adjustment, and a 50% increase of the leaf’s fresh weight (FW) : dry weight (DW) ratio and non-significant increase in elasticity enhanced crop water-capacitance. Day respiration (Rd) increased 2.7 times at high salinity but decreased 0.6 times during drought compared with control. Mesophyll conductance (gm) tended to be negatively affected by salinity as the increased succulence (FW : DW) possibly decreased intercellular space and increased cell-wall thickness. However, the increased K+ uptake seemed to alleviate biochemical limitations, as maximum Rubisco carboxylation rate (Vcmax) and photosynthetic electron transport (J) tended to increase under salinity. Overall, salinity and PD restricted stomatal conductance (gs) and photosynthesis (An) moderately, leading to decreased leaf internal to ambient [CO2], increase of intrinsic-water-use-efficiency (An/gs). The saturated electrical conductivity (ECe) resulting in 50% yield was estimated to be 25 dS m–1, reaching no yield at 51.5 dS m–1.

KW - intrinsic water use efficiency

KW - ion uptake

KW - mesophyll conductance

KW - salinity threshold value

KW - Stomatal conductance

U2 - 10.1071/fp14132

DO - 10.1071/fp14132

M3 - Journal article

VL - 42

SP - 136

EP - 148

JO - Functional Plant Biology

JF - Functional Plant Biology

SN - 1445-4408

IS - 2

ER -