Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 566702
Title Differential responses to salt stress in ion dynamics, growth and seed yield of European quinoa varieties
Author(s) Jaramillo Roman, Viviana; Toom, Leonardus A. den; Castro Gamiz, Carlos; Pijl, Niels van der; Visser, Richard G.F.; Loo, Eibertus N. van; Linden, Gerard van der
Source Environmental and Experimental Botany 177 (2020). - ISSN 0098-8472
DOI https://doi.org/10.1016/j.envexpbot.2020.104146
Department(s) Plant Breeding
EPS
PE&RC
Plant Breeding
Publication type Refereed Article in a scientific journal
Publication year 2020
Keyword(s) Chenopodium quinoa - Naexclusion - RGR - Salt stress tolerance - Survival and growth
Abstract

Quinoa is a nutritious seed crop with a great potential to grow in saline soils. Here, we studied ion concentrations in quinoa tissues throughout the life cycle of the plant, and linked ion dynamics to responses in growth parameters, seed yield and efficiency of photosynthesis under salinity (0–400 mM NaCl). Ion dynamics changed from high ion exclusion (>99 %, root contents lower than root medium and low accumulation of ions in the leaves) before flowering, to a build-up of ions during seed filling. This indicates a change in strategy in maintaining the necessary gradient of water potential from the root medium to the leaves. K+ concentrations in leaves also increased by more than 100 % in response to prolonged severe salt stress, which may point to a role of this ion in leaf osmotic adjustment. Accumulation of ions in epidermal bladder cells did not contribute substantially to Na+-exclusion as it was less than 6 % of the total Na+ taken up in leaves. Growth under salt stress was mostly impaired by anatomical adaptations (reduced SLA), while initial light use efficiency (Fv/Fm) and NAR were not affected. The variety Pasto showed a “survival strategy” to high salinity with higher ion exclusion and a higher reduction in transpiration than the other varieties, at the expense of lower biomass and seed yield.

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