Water use and growth responses of dryland wheat grown under elevated [CO2] are associated with root length in deeper, but not upper soil layer

Uddin, Shihab; Löw, Markus; Parvin, Shahnaj; Fitzgerald, Glenn J.; Bahrami, Helale; Tausz‐Posch, Sabine; Armstrong, Roger; O’Leary, G.; Tausz, Michael

doi:10.1016/j.fcr.2018.05.014

Cited by 36 publications

(26 citation statements)

References 88 publications

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“…Commonly observed shifts in the distribution of roots within the soil profile towards the surface (Pritchard & Rogers ) or into deeper depths (Uddin et al . 2018c), however, might decrease the efficiency of soil exploration (Fitter et al . ).…”

Section: Nitrogen Relations Under Elevated [Co2]mentioning

confidence: 99%

“…While a recent study on wheat in a dryland agro‐ecosystem indicated that yield stimulation by e[CO 2 ] is associated with root growth stimulation in deeper, but not in shallow, soil (Uddin et al . 2018c), there was no evidence that e[CO 2 ] mitigated drought through better or deeper water extraction in soybean FACE experiments (Gray et al . ).…”

Section: Interactions Of Elevated [Co2] and Droughtmentioning

confidence: 99%

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Elevated [CO₂] effects on crops: Advances in understanding acclimation, nitrogen dynamics and interactions with drought and other organisms

2019

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Future rapid increases in atmospheric CO 2 concentration [CO 2 ] are expected, with values likely to reach~550 ppm by mid-century. This implies that every terrestrial plant will be exposed to nearly 40% more of one of the key resources determining plant growth. In this review we highlight selected areas of plant interactions with elevated [CO 2 ] (e[CO 2 ]), where recently published experiments challenge long-held, simplified views. Focusing on crops, especially in more extreme and variable growing conditions, we highlight uncertainties associated with four specific areas. (1) While it is long known that photosynthesis can acclimate to e[CO 2 ], such acclimation is not consistently observed in field experiments. The influence of sink-source relations and nitrogen (N) limitation on acclimation is investigated and current knowledge about whether stomatal function or mesophyll conductance (g m ) acclimate independently is summarised.(2) We show how the response of N uptake to e[CO 2 ] is highly variable, even for one cultivar grown within the same field site, and how decreases in N concentrations ([N]) are observed consistently. Potential mechanisms contributing to [N] decreases under e[CO 2 ] are discussed and proposed solutions are addressed. (3) Based on recent results from crop field experiments in highly variable, non-irrigated, waterlimited environments, we challenge the previous opinion that the relative CO 2 effect is larger under drier environmental conditions. (4) Finally, we summarise how changes in growth and nutrient concentrations due to e[CO 2 ] will influence relationships between crops and weeds, herbivores and pathogens in agricultural systems.

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Section: Nitrogen Relations Under Elevated [Co2]mentioning

confidence: 99%

Section: Interactions Of Elevated [Co2] and Droughtmentioning

confidence: 99%

Elevated [CO₂] effects on crops: Advances in understanding acclimation, nitrogen dynamics and interactions with drought and other organisms

2019

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“…The inversed results were probability caused by root growth responded differently to drought and salinity stress, which is sensitively to obtain water from soil [56]. Furthermore, the interactive of drought and salinity stress signi cantly affected WUE at both leaf and yield levels, which means we should consider the comprehensive in uence of drought and salinity on WUE in the future for sustainable agriculture.…”

Section: Discussionmentioning

confidence: 99%

Biochar addition alleviate the negative effects of drought and salinity stress on soybean productivity and water use efficiency

Zhang

Ding

Wang

et al. 2020

Preprint

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Background: Environmental stress is a crucial factor restricting plant growth as well as crop productivity, thus influencing the agricultural sustainability. Biochar addition is proposed as an effective management to improve crop performance. However, there were few studies focused on the effect of biochar addition on crop growth and productivity under interactive effect of abiotic stress (e.g., drought and salinity). This study was conducted with a pot experiment to investigate the interaction effects of drought and salinity stress on soybean yield, leaf gaseous exchange and water use efficiency (WUE) under biochar addition. Results: Drought and salinity stress significantly depressed soybean phenology (e.g. flowering time) and all the leaf gas exchange parameters, but had inconsistent effects on soybean root growth and WUE at leaf and yield levels. Salinity stress significantly decreased photosynthetic rate, stomatal conductance, intercellular CO2 concentration and transpiration rate by 20.7%, 26.3%, 10.5% and 27.2%, respectively. Lower biomass production and grain yield were probably due to the restrained photosynthesis under drought and salinity stress. Biochar addition significantly enhanced soybean grain yield by 3.1-14.8%. Drought stress and biochar addition significantly increased WUE-yield by 27.5% and 15.6%, respectively, while salinity stress significantly decreased WUE-yield by 24.2%. Drought and salinity stress showed some negative interactions on soybean productivity and leaf gaseous exchange. But biochar addition alleviate the negative effects on soybean productivity and water use efficiency under drought and salinity stress. Conclusions: The results of the present study indicated that drought and salinity stress could significantly depress soybean growth and productivity. There exist interactive effects of drought and salinity stress on soybean productivity and water use efficiency, while we could employ biochar to alleviate the negative effects. We should consider the interactive effects of different abiotic restriction factors on crop growth thus for sustainable agriculture in the future.

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“…The authors studied the impact of bioactive substances and bacterial preparations on the winter durum wheat productivity, which are still little studied. In this regard, the impact of presowing treatment and the one applied to vegetative plants with growth-regulating preparations is currently relevant (3)(4)(5)(6)(7)(9)(10)(11)(12)(13)(14)(15)(16).…”

Section: Introductionmentioning

confidence: 99%

The Structure and Productivity of Winter Durum Wheat Subject to Pre-Sowing Treatment

Podlesnykh¹,

Galochkina²

2018

International Scientific and Practical Conference "AgroSMART - Smart Solutions for Agriculture" (AgroSMART 2018)

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The paper studies the productivity of winter durum wheat of Zolotko variety subject to the treatment of seed grains with the preparations Poly-Feed, Plodorodiye Sibiri, Vitazim, Agat-25K, Micromak, potassium humate applied separately and in the mixture of Poly-Feed + Plodorodiye Sibiri + Vitazim followed by the treatment of plants with Vitazim, Fertigrain Foliar and the mixture of Vitazim + Fertigrain Foliar in the forest-steppe of the Central Chernozem Region. The experiments were conducted in 2014/15-2015/16 in the fields of Voronezh SAU. For the treatment of winter durum wheat seeds, the most effective preparations to increase tillering capacity were Agat-25K (1.18 seeds/plant), Vitazim (1.17 seeds/plant) and potassium humate (1.17 seeds/plant). The number of kernels per head increased provided that the seeds were treated with Agat-25K, Micromak, Plodorodiye Sibiri, especially followed by the further treatment of plants with the mixture of Vitazim + Fertigrain Foliar. The weight of grains in the ear increased up to 1.28 and 1.27g when the seeds were treated with Agat-25K and Micromak jointly with the treatment of plants with Vitazim + Fertigran Foliar. A thousand grain weight was greater when the seeds were treated with Agat 25K, Micromak and potassium humate jointly with the treatment of plants with a mixture of Vitazim + Fertigrean Foliar and amounted to 45.0; 44.9 and 44.85g, respectively. A high yield was obtained when Agat-25K and Micromak were used for treating seeds, together with treating plants with a mixture of Vitazim + Fertigrean Foliar. It amounted to 52.7 and 52.2 c/ha, respectively. The highest synergetic efficiency was observed when treating the seeds with Agat-25K or Micromak together with treating the plants with Vitazim + Fertigrain Foliar mixture.

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Water use and growth responses of dryland wheat grown under elevated [CO2] are associated with root length in deeper, but not upper soil layer

Cited by 36 publications

References 88 publications

Elevated [CO₂] effects on crops: Advances in understanding acclimation, nitrogen dynamics and interactions with drought and other organisms

Elevated [CO₂] effects on crops: Advances in understanding acclimation, nitrogen dynamics and interactions with drought and other organisms

Biochar addition alleviate the negative effects of drought and salinity stress on soybean productivity and water use efficiency

The Structure and Productivity of Winter Durum Wheat Subject to Pre-Sowing Treatment

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Water use and growth responses of dryland wheat grown under elevated [CO2] are associated with root length in deeper, but not upper soil layer

Cited by 36 publications

References 88 publications

Elevated [CO2] effects on crops: Advances in understanding acclimation, nitrogen dynamics and interactions with drought and other organisms

Elevated [CO2] effects on crops: Advances in understanding acclimation, nitrogen dynamics and interactions with drought and other organisms

Biochar addition alleviate the negative effects of drought and salinity stress on soybean productivity and water use efficiency

The Structure and Productivity of Winter Durum Wheat Subject to Pre-Sowing Treatment

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Product

Resources

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Elevated [CO₂] effects on crops: Advances in understanding acclimation, nitrogen dynamics and interactions with drought and other organisms

Elevated [CO₂] effects on crops: Advances in understanding acclimation, nitrogen dynamics and interactions with drought and other organisms