Leaf gas exchange and water relation characteristics of field quinoa (Chenopodium quinoa Willd.) during soil drying

Jensen, C. R.; Jacobsen, S.; Andersen, M. N.; Núñez, N; Andersen, S.D; Rasmussen, Lars Holm; Mogensen, V. O.

doi:10.1016/s1161-0301(00)00055-1

Cited by 195 publications

(167 citation statements)

References 27 publications

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“…Stomatal closure decreases the CO 2 levels within the leaf, reducing the light-independent reactions and causing the photosynthetic rate to also decrease. This relationship was seen by Jensen et al [44] when the net photosynthesis of drought quinoa plants dropped from 14 -24 µmol m . Certain quinoa varieties that have inherently higher leaf stomatal conductance to water vapor are capable of retaining higher photosynthesis rates [45].…”

Section: Phenotypic Responsesupporting

confidence: 54%

Transcriptome Analysis of Drought Induced Stress in <i>Chenopodium quinoa</i>

Raney¹,

Reynolds²,

Elzinga³

et al. 2014

AJPS

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Quinoa (Chenopodium quinoa Willd.) is a halophytic, allotetraploid grain crop of the Amaranthaceae family with impressive drought tolerance, nutritional content and an increasing worldwide market. Here we report the results of an RNA-seq transcriptome analysis of Chenopodium quinoa using four water treatments (field capacity to drought) on the varieties "Ingapirca" (representing valley ecotypes) and "Ollague" (representing Altiplano Salares ecotypes). Physiological results, including growth rate, photosynthetic rate, stomatal conductance, and stem water potential, support the earlier findings that the Altiplano Salares ecotypes display greater tolerance to drought-like stress conditions than the valley ecotypes. cDNA libraries from root tissue samples for each variety × treatment combination were sequenced using Illumina Hi-Seq technology in an RNA-seq experiment. De novo assembly of the transcriptome generated 20,337 unique transcripts. Gene expression analysis of the RNA-seq data identified 462 putative gene products that showed differential expression based on treatment, and 27 putative gene products differentially expressed based on variety × treatment, including significant expression differences in root tissue in response to increasing water stress. BLAST searches and gene ontology analysis show an overlap between drought tolerance stress and other abiotic stress mechanisms.

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Section: Phenotypic Responsesupporting

confidence: 54%

Transcriptome Analysis of Drought Induced Stress in <i>Chenopodium quinoa</i>

Raney¹,

Reynolds²,

Elzinga³

et al. 2014

AJPS

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“…Diminuição no ψ oh também foi observada por Jensen et al (2000) ao estudarem as relações hídricas de Chenopodium quinoa com déficit hídrico no solo. Em um estudo com diferentes cultivares de trigo, Bajji et al (2001) também observaram queda no ψ oh , em razão do déficit hídrico, a qual foi mais acentuada em folhas que ainda estavam em crescimento.…”

Section: Resultsunclassified

Ajuste osmótico em milho cultivado em diferentes sistemas de manejo de solo e disponibilidade hídrica

Bianchi

Bergonci

Bergamaschi

et al. 2005

Pesq. agropec. bras.

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Resumo -A cultura do milho é sensível ao déficit hídrico, e esta é uma causa freqüente de redução na produção de grãos. O objetivo deste trabalho foi verificar a ocorrência de ajuste osmótico em milho, cultivado em dois sistemas de manejo do solo, com diferentes disponibilidades hídricas. Os tratamentos consistiram do cultivo do milho em semeadura direta (SD) e convencional (SC), com irrigação de forma a manter a umidade do solo próxima à capacidade de campo, e sem irrigação. O ajuste osmótico foi obtido pela diferença do potencial osmótico hidratado entre as plantas irrigadas e sem irrigação. Os maiores valores de potencial mínimo de água na folha ocorreram em plantas cultivadas sob SD, em razão do maior potencial matricial da água no solo nesse sistema. O potencial de pressão e o osmótico hidratado diminuíram em conseqüência do déficit hídrico, o que determinou a ocorrência de ajuste osmótico em ambos os sistemas, que foi mais intenso em manejo convencional. Portanto, o potencial mínimo de água na folha demonstra ser um indicador adequado da condição hídrica das plantas de milho. A cultura apresenta tolerância ao déficit hídrico por meio do mecanismo de ajuste osmótico.Termos de indexação: Zea mays, potencial de água na folha, déficit hídrico, plantio direto. Osmotic adjustment in maize cultivated in different soil tillage systems and water availabilityAbstract -Maize is a very sensible crop to water deficit, which is a frequent cause of reduction in its grain yield. The objective of this work was to verify the occurrence of osmotic adjustment in maize cultivated in different soil management systems and water availability. The maize was cropped in no-tillage (NT) and conventional tillage (CT), with irrigation and no-irrigation. For measurements of minimum leaf water potential, a pressure chamber was utilized. Osmotic adjustment was calculated as the difference between osmotic potentials at full turgor, in irrigated and non-irrigated plants. Highest values of minimum leaf water potential were found in plants cropped in NT, as a response to the highest soil potential on this cropping system. Pressure potential and the osmotic potential at full turgor were reduced as a response to water deficit, resulting on an osmotic adjustment in both cropping systems, with a highest intensity in the CT system. Minimum leaf water potential showed sensitivity to water deficit, which makes it a good indicator of plant water status on maize. Maize crop showed tolerance to water deficit through the mechanism of osmotic adjustment.

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“…Stomatal closure is stimulated by a leaf water potential decrease due to soil drying (Jensen et al 2000), and it has been suggested that soil water deficit stimulates a root-shoot chemical signal, xylem borne abscisic acid (ABA), which is transported to the shoot and regulates the shoot physiological activity (Davies and Zhang 1991;Ali et al 1998;Liu et al 2005). Some methods have been developed to relate ABA synthesis rate in response to soil drying (Lhomme 2001).…”

Section: Introductionmentioning

confidence: 99%

Influence of leaf water potential on diurnal changes in CO2 and water vapour fluxes

Wang

et al. 2007

Boundary-Layer Meteorol

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Mass and energy fluxes between the atmosphere and vegetation are driven by meteorological variables, and controlled by plant water status, which may change more markedly diurnally than soil water. We tested the hypothesis that integration of dynamic changes in leaf water potential may improve the simulation of CO 2 and water fluxes over a wheat canopy. Simulation of leaf water potential was integrated into a comprehensive model (the ChinaAgrosys) of heat, water and CO 2 fluxes and crop growth. Photosynthesis from individual leaves was integrated to the canopy by taking into consideration the attenuation of radiation when penetrating the canopy. Transpiration was calculated with the Shuttleworth-Wallace model in which canopy resistance was taken as a link between energy balance and physiological regulation. A revised version of the Ball-Woodrow-Berry stomatal model was applied to produce a new canopy resistance model, which was validated against measured CO 2 and water vapour fluxes over winter wheat fields in Yucheng (36 • 57 N, 116 • 36 E, 28 m above sea level) in the North China Plain during 1997, 2001 and 2004. Leaf water potential played an important role in causing stomatal conductance to fall at midday, which caused diurnal changes in photosynthesis and transpiration. Changes in soil water potential were less important. Inclusion of the dynamics of leaf water potential can improve the precision of the simulation of CO 2 and water vapour fluxes, especially in the afternoon under water stress conditions.

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Leaf gas exchange and water relation characteristics of field quinoa (Chenopodium quinoa Willd.) during soil drying

Cited by 195 publications

References 27 publications

Transcriptome Analysis of Drought Induced Stress in <i>Chenopodium quinoa</i>

Transcriptome Analysis of Drought Induced Stress in <i>Chenopodium quinoa</i>

Ajuste osmótico em milho cultivado em diferentes sistemas de manejo de solo e disponibilidade hídrica

Influence of leaf water potential on diurnal changes in CO2 and water vapour fluxes

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Leaf gas exchange and water relation characteristics of field quinoa (Chenopodium quinoa Willd.) during soil drying

Cited by 195 publications

References 27 publications

Transcriptome Analysis of Drought Induced Stress in &lt;i&gt;Chenopodium quinoa&lt;/i&gt;

Transcriptome Analysis of Drought Induced Stress in &lt;i&gt;Chenopodium quinoa&lt;/i&gt;

Ajuste osmótico em milho cultivado em diferentes sistemas de manejo de solo e disponibilidade hídrica

Influence of leaf water potential on diurnal changes in CO2 and water vapour fluxes

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Transcriptome Analysis of Drought Induced Stress in <i>Chenopodium quinoa</i>

Transcriptome Analysis of Drought Induced Stress in <i>Chenopodium quinoa</i>