Effective use of water (EUW) and not water-use efficiency (WUE) is the target of crop yield improvement under drought stress

Blum, A.

doi:10.1016/j.fcr.2009.03.009

Cited by 1,009 publications

(841 citation statements)

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“…For example, WUE was 2 (P = 0.89), 12 (P = 0.37), and 27% (P = 0.10) lower for CW 3 , CW 2 and CW 1 , respectively, than for CW 4 . This result supports the premise that water deficit can increase plant WUE (Meyers et al, 1984;Blum, 2009).…”

Section: Wuesupporting

confidence: 79%

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Effect of rock fragments content on water consumption, biomass and water-use efficiency of plants under different water conditions

Shao

Liu

2016

Ecological Engineering

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a b s t r a c tThe proportion of rock fragments in soil affects water availability and therefore the characteristics of plants. The objective of this study was to evaluate the effect of rock-fragment content on plant water consumption, biomass, growth and water-use efficiency (WUE) under different water conditions. Four gravimetric treatments of rock-fragment contents (0, 10, 30 and 50%) and four treatments of water content were tested in sandy loamy soils. The water contents of the rock-free soil were 15-19% (80-100% of field capacity), 11-15% (60-80% of field capacity), 9-11% (47-60% of field capacity) and 6-9% (32-47% of field capacity). Transpiration, plant height, basal stem diameter and biomass of korshinsk peashrubs in the treatments were measured and compared. Plants grown in the soil with rock fragments transpired less, especially under well-watered conditions. The mean daily transpiration of plants in the soils with 30 and 50% rock-fragment contents was 18% (P = 0.021) and 34% (P = 0.001) lower, respectively, in 2014, and 25% (P = 0.008) and 31% (P = 0.002) lower, respectively, in 2015 relative to the soil without rock fragments and was not lower in the soil with 10% rock fragments. Plant height, basal stem diameter and biomass did not differ significantly between rock-fragment contents of 0 and 30% but were lower at 50%. WUE, the ratio between total transpiration and biomass, was highest at 30% and then decreased at 50%. Increasing plant water stress could thus improve WUE. The rock fragments in the soil had significant effects on plant water consumption, biomass, growth and WUE. Optimizing the rock-fragment content is necessary when the relationships between plants and water in stony ecosystems are evaluated.

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Section: Wuesupporting

confidence: 79%

“…WUE is often considered an important determinant of yield under stress (Blum, 2009). In our study, biomass WUE (or transpiration) was calculated as the ratio between biomass produced and water consumed (transpired).…”

Section: Wuementioning

confidence: 99%

Effect of rock fragments content on water consumption, biomass and water-use efficiency of plants under different water conditions

Shao

Liu

2016

Ecological Engineering

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“…For crop-plants the reproductive stage is the most drought sensitive developmental stage (Blum 2009;Peleg et al 2011a). In the current study we applied a short waterstress treatment at the pre-anthesis stage (booting stage, panicle elongation), by withholding water until the stress symptoms appeared in the transgenic plants (leaf rolling, leaf senescence and reduction of photosynthetic activity), follow re-watering (Peleg et al 2011b).…”

Section: (D) (A) (B) (C) (E)mentioning

confidence: 99%

The rice transcription factor OsWRKY47 is a positive regulator of the response to water deficit stress

et al. 2015

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“…However, for the selection of plants with high-performing yield components, when plants are grown under unfavorable conditions including water deficiency, the time-consuming mapping of quantitative traits, such as yield and stress tolerance, is difficult because genotypes are never unambiguously inferred from the phenotype. Additionally, estimating WUE relies either on long-term measurements of plant-water consumption or assessments of biomass production; and these large-scale approaches are not feasible in individual plant screening efforts (Blum, 2009;Brito et al, 2011;Tuberosa et al, 2011). As a complementary selection strategy, carbon isotope discrimination (∆) -an indirect indicator for WUE (Farquhar et al, 1989;Brito et al, 2011;Elazab et al, 2012) that correlates closely with water deficit tolerance (Centritto et al, 2009) -can be used as a phenomic facility for plant selection procedures under field condition, saving cost and time-consuming in expensive testing in cotton breeding programs.…”

Section: Introductionmentioning

confidence: 99%

Carbon isotope fractionation for cotton genotype selection

Brito

Suassuna

Diola³

et al. 2014

Pesq. agropec. bras.

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-The objective of this work was to evaluate the carbon isotope fractionation as a phenomic facility for cotton selection in contrasting environments and to assess its relationship with yield components. The experiments were carried out in a randomized block design, with four replicates, in the municipalities of Santa Helena de Goiás (SHGO) and Montividiu (MONT), in the state of Goiás, Brazil. The analysis of carbon isotope discrimination (Δ) was performed in 15 breeding lines and three cultivars. Subsequently, the root growth kinetic and root system architecture from the selected genotypes were determined. In both locations, Δ analyses were suitable to discriminate cotton genotypes. There was a positive correlation between Δ and seed-cotton yield in SHGO, where water deficit was more severe. In this site, the negative correlations found between Δ and fiber percentage indicate an integrative effect of gas exchange on Δ and its association with yield components. As for root robustness and growth kinetic, the GO 05 809 genotype performance contributes to sustain the highest values of Δ found in MONT, where edaphoclimatic conditions were more suitable for cotton. The use of Δ analysis as a phenomic facility can help to select cotton genotypes, in order to obtain plants with higher efficiency for gas exchange and water use.Index terms: Gossypium, carbon isotope discrimination, genetic breeding, phenotyping. Fracionamento isotópico do carbono na seleção de genótipo de algodoeiroResumo -O objetivo deste trabalho foi avaliar o fracionamento isotópico do carbono como facilidade fenômica para a seleção de algodoeiro em ambientes contrastantes e analisar a sua correlação com os componentes de rendimento. Foram conduzidos experimentos em blocos ao acaso, com quatro repetições, em Santa Helena de Goiás (SHGO) e Montividiu (MONT), GO. A análise da discriminação isotópica do carbono (Δ) foi realizada em 15 linhagens e três cultivares. Em seguida, foram determinadas a cinética de crescimento e a arquitetura do sistema radicular a partir de genótipos selecionados anteriormente. Em ambas as localidades, as análises de Δ mostraram-se adequadas para discriminar os genótipos de algodoeiro. Houve correlação positiva entre Δ e a produtividade de algodão em caroço em SHGO, onde o deficit hídrico foi mais severo. Neste local, as correlações negativas encontradas entre Δ e a percentagem de fibras indicam um efeito integrativo de trocas gasosas sobre Δ e sua associação com componentes de rendimento. Quanto à robustez e à cinética de crescimento do sistema radicular, o desempenho do genótipo GO 05 809 contribui para sustentar os maiores valores de Δ encontrados em MONT, onde as condições edafoclimáticas foram mais adequadas para o algodoeiro. O uso da análise de Δ como facilidade fenômica pode auxiliar a seleção de genótipos de algodoeiro, para a obtenção de plantas com maior eficiência quanto à troca gasosa e ao uso da água.Termos para indexação: Gossypium, discriminação isotópica do carbono, melhoramento genético, fenotipagem.

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Effective use of water (EUW) and not water-use efficiency (WUE) is the target of crop yield improvement under drought stress

Cited by 1,009 publications

References 69 publications

Effect of rock fragments content on water consumption, biomass and water-use efficiency of plants under different water conditions

Effect of rock fragments content on water consumption, biomass and water-use efficiency of plants under different water conditions

The rice transcription factor OsWRKY47 is a positive regulator of the response to water deficit stress

Carbon isotope fractionation for cotton genotype selection

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