Response of some Andean cultivars of quinoa (Chenopodium quinoa Willd.) to temperature: Effects on germination, phenology, growth and freezing

Bois, Jean-François; Winkel, Thierry; Lhomme, Jean-Paul; Raffaillac, Jean-Pierre; Rocheteau, Alain

doi:10.1016/j.eja.2006.06.007

Cited by 74 publications

(58 citation statements)

References 31 publications

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“…Experimental details are as described by Ceccato et al (2011). Bois et al (2006) indicated that maximum germination in quinoa occurs between 18 and 238C. Both accessions were obtained from the Germplasm Bank at the US Department of Agriculture, National Plant Germplasm System at Beltsville, Maryland, where they are identified as PI 614850 and AMES 13 737, respectively.…”

Section: Seed Production and Germinationmentioning

confidence: 99%

Structural aspects of dormancy in quinoa (Chenopodium quinoa): importance and possible action mechanisms of the seed coat

Ceccato¹,

Bertero

Batlla

et al. 2015

Seed Sci. Res.

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Two possible sources of resistance to pre-harvest sprouting were evaluated in quinoa. They showed dormancy at harvest and significant variations in dormancy level in response to environmental conditions experienced during seed development. The aims of this work were to evaluate the importance of seed coats in the regulation of dormancy in this species, to investigate possible mechanisms of action and to assess association of seed coat properties with changes in dormancy level caused by the environment. Accessions Chadmo and 2-Want were grown under field conditions on different sowing dates during 2 years. Seed coats were manipulated and seed germination was evaluated at different temperatures. Seed coat perforation before incubation led to faster dormancy loss in both accessions. This effect decreased with delayed sowing date, and seeds expressed a level of dormancy not imposed by coats. This suggests the presence of embryo dormancy in the genus Chenopodium. Seeds of the accession 2-Want had a significantly thinner seed coat at later sowing dates, associated with a decreasing coat-imposed dormancy, but this pattern was not detected in Chadmo. The seed coat acts as a barrier to the release of endogenous abscisic acid (ABA) in quinoa, suggested by the increase in germination and a higher amount of ABA leached from perforated seeds. ABA is able to leach from seeds with an intact seed coat, suggesting that differences in seed coat thickness may allow the leakage of different amounts of ABA. This mechanism may contribute to the observed differences in dormancy level, either between sowing dates or between accessions.

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Section: Seed Production and Germinationmentioning

confidence: 99%

Structural aspects of dormancy in quinoa (Chenopodium quinoa): importance and possible action mechanisms of the seed coat

Ceccato¹,

Bertero

Batlla

et al. 2015

Seed Sci. Res.

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“…2007). Quinoa is well adapted to grow under conditions of extreme aridity and low temperatures occurring in Andean highlands of Bolivia, Peru, Chile and Argentina (Aguilar and Jacobsen 2003, Bois et al. 2006).…”

Section: Introductionmentioning

confidence: 99%

Genotypic Variation of Gas Exchange Parameters and Leaf Stable Carbon and Nitrogen Isotopes in Ten Quinoa Cultivars Grown under Drought

González

Bruno

Valoy

et al. 2010

Journal of Agronomy and Crop Science

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Genotypic variations in leaf gas exchange and grain yield were analysed in 10 highland‐adapted quinoa cultivars grown in the field under drought conditions. Trials took place in an arid mountain region of the Northwest of Argentina (Encalilla, Amaicha del Valle, 22°31′S, 65°59′W). Significant changes in leaf gas exchange and grain yield among cultivars were observed. Our data demonstrate that leaf stomatal conductance to water vapour (gs) is a major determinant of net CO2 assimilation (An) because quinoa cultivars with inherently higher gs were capable of keeping higher photosynthesis rate. Aboveground dry mass and grain yield significantly varied among cultivars. Significant variations also occurred in chlorophyll, N and P content, photosynthetic nitrogen‐use efficiency (PNUE), specific leaf area (SLA), intrinsic water‐use efficiency (iWUE) and carboxylation capacity (An/Ci). Many cultivars gave promissory grain yields with values higher than 2000 kg ha−1, reaching for Sayaña cultivar 3855 kg ha−1. Overall, these data indicate that cultivars, which showed higher photosynthesis and conductances, were also generally more productive. Carbon isotope discrimination (Δ) was positively correlated with the grain yield and negatively with iWUE, but δ15N did not show significant correlations. This study provides a reliable measure of specific responses of quinoa cultivars to drought and it may be valuable in breeding programmes.

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“…After these points, both response values slightly decreased for higher incubation temperatures. Bois et al (2006) evaluated the rate of germination of ten quinoa cultivars at different temperatures. The authors demonstrated that the speed of germination was markedly increased when germination temperature increased from 2 to 20°C.…”

Section: Optimisation Of Germination Conditionsmentioning

confidence: 99%

Effect of malting conditions on phenolic content, Maillard reaction products formation, and antioxidant activity of quinoa seeds

2016

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In this study, the effect of malting process on the antioxidant compounds and antioxidant capacity of quinoa seeds was studied. The optimal germination conditions were germination temperature of 23°C, degree of steeping of 36% and germination time of 3 days. Under these conditions, green quinoa malt was obtained and subsequently roasted at different temperatures (100-190°C). Results showed maximum increases in phenolic compounds, Maillard reaction products and antioxidant activity (DPPH radical scavenging and reducing power) in samples roasted at 145°C for 30 min, whereas a more intensive thermal treatment (190°C) diminished the levels of all evaluated variables. Thus, malting with a moderate thermal treatment could be considered as an effective process to enrich antioxidants in quinoa grains for their further use as functional ingredient in the production of gluten-free foods and beverages.

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Response of some Andean cultivars of quinoa (Chenopodium quinoa Willd.) to temperature: Effects on germination, phenology, growth and freezing

Cited by 74 publications

References 31 publications

Structural aspects of dormancy in quinoa (Chenopodium quinoa): importance and possible action mechanisms of the seed coat

Structural aspects of dormancy in quinoa (Chenopodium quinoa): importance and possible action mechanisms of the seed coat

Genotypic Variation of Gas Exchange Parameters and Leaf Stable Carbon and Nitrogen Isotopes in Ten Quinoa Cultivars Grown under Drought

Effect of malting conditions on phenolic content, Maillard reaction products formation, and antioxidant activity of quinoa seeds

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