Effect of drought and carbon dioxide on nutrient uptake and levels of nutrient‐uptake proteins in roots of barley

Bista, Deepesh R.; Heckathorn, Scott A.; Jayawardena, Dileepa M.; Boldt, Jennifer K.

doi:10.1002/ajb2.1542

Cited by 20 publications

(9 citation statements)

References 59 publications

(100 reference statements)

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“…We also found that the early-stage drought stress decreased biomass at 700 ppm CO 2 level. It was found that under elevated CO 2 (700 ppm) water limitation at the terminal growing stage reduced biomass in durum wheat, according to Garmendia et al [51], and in barley, according to Bista et al [52]; however, in the case of the examined barley cultivar, we found increased biomass values compared to the control. In disagreement with our findings, Varga et al [28] found no significant differences in the plants' biomass between the well-watered and drought-stressed winter wheat at different developmental stages at elevated CO 2 level (1000 ppm), which fact confirms the variety-specific CO 2 responses.…”

Section: Discussioncontrasting

confidence: 55%

CO2 Responses of Winter Wheat, Barley and Oat Cultivars under Optimum and Limited Irrigation

et al. 2021

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Field crop production must adapt to the challenges generated by the negative consequences of climate change. Yield loss caused by abiotic stresses could be counterbalanced by increasing atmospheric CO2 concentration, but C3 plant species and varieties have significantly different reactions to CO2. To examine the responses of wheat, barley and oat varieties to CO2 enrichment in combination with simulated drought, a model experiment was conducted under controlled environmental conditions. The plants were grown in climate-controlled greenhouse chambers under ambient and enriched (700 ppm and 1000 ppm) CO2 concentrations. Water shortage was induced by discontinuing the irrigation at BBCH stages 21 and 55. Positive CO2 responses were determined in barley, but the CO2-sink ability was low in oats. Reactions of winter wheat to enriched CO2 concentration varied greatly in terms of the yield parameters (spike number and grain yield). The water uptake of all wheat cultivars decreased significantly; however at the same time, water-use efficiency improved under 1000 ppm CO2. Mv Ikva was not susceptible to CO2 fertilization, while no consequent CO2 reactions were observed for Mv Nádor and Mv Nemere. Positive CO2 responses were determined in Mv Kolompos.

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Section: Discussioncontrasting

confidence: 55%

CO2 Responses of Winter Wheat, Barley and Oat Cultivars under Optimum and Limited Irrigation

et al. 2021

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“…58 In this study, drought significantly reduced the accumulation of plant N, P and K by the end-of-drought harvest in all sorghum species, suggesting that the forage quality of these drought-stressed plants also decreased. It has been recognized for decades that drought can decrease the rate of nutrient uptake by plants, independent of water uptake, 59,60 and hamper uptake and transference of macronutrients (N, P and K) in many plant species. [61][62][63] Nitrogen fertilization increased the content of N, P and K in all sorghum species under both well-watered and drought-stressed conditions, particularly at 120 kg N ha −1 .…”

Section: Discussionmentioning

confidence: 99%

Effects of nitrogen fertilization and drought on hydrocyanic acid accumulation and morpho‐physiological parameters of sorghums

Guo

2020

J Sci Food Agric

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BACKGROUND: Nitrogen fertilization can increase sorghum yield and quality and the hydrocyanic acid (HCN) accumulation in plants, increasing the risk of animal toxicity, particularly under drought conditions. In this study, plants of three sorghum genotypes (sweet sorghum, sudangrass and hybrid sorghum) were supplemented with nitrogen (0, 60, 90 and 120 kg N ha −1 ) under well-watered and drought-stressed conditions, aiming to investigate the responses of morpho-physiological parameters and HCN accumulation to drought and nitrogen fertilization.RESULTS: Drought caused a decline in growth and photosynthesis. Average HCN content increased by 27.85% in droughtstressed plants when compared with those in well-watered plants. Drought increased the proline and soluble protein content, the content of O 2 − , H 2 O 2 and malondialdehyde (MDA), and the activities of antioxidant enzymes in leaves of all three genotypes. Maximum plant growth and higher plant nutrient content (nitrogen and phosphorus) were observed at 120 kg N ha −1 , followed by 90 and 60 kg N ha −1 . However, a sharp increase in HCN content and a decrease in antioxidant enzyme activities were observed when nitrogen rates increased from 90 to 120 kg N ha −1 , suggesting that 90 kg N ha −1 might be better for sorghums under drought conditions. CONCLUSION: These results suggest that optimum nitrogen application on sorghum under drought conditions could achieve a balance between plant defense and food safety, attributed to the reduced MDA, O 2 − and H 2 O 2 accumulation, the improvement in photosynthesis parameters, the increase in soluble protein and proline content, and the increase in antioxidant enzyme activities.

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“…In barley, drought stress alone significantly reduces the uptake of N and P but the increase of CO 2 has no clear effect. However, high levels of CO 2 and drought cause a mild increase in the activity of NRT1 and AMT1 which are root transporters for NO 3 − and NH 4 + , respectively (Bista et al, 2020). This observation could indicate a positive effect in the uptake of nutrients under drought stress caused by elevated CO 2 .…”

Section: Environmental and Atmospheric-related Stressesmentioning

confidence: 98%

“…Thus, elevated CO 2 has been correlated with enhanced root biomass, length, area and density due to an increase in carbon assimilation in sorghum (Chaudhuri et al, 1986). An increase in root length, as a consequence of elevated CO 2 and drought, has been observed in several crops such as wheat, barley and coffee (Chaudhuri et al, 1990;De Souza et al, 2015;Avila et al, 2020;Bista et al, 2020). In addition to the effect on root growth, elevated CO 2 also enhances root respiration in drought-stressed pepper plants (del Amor et al, 2010).…”

Section: Environmental and Atmospheric-related Stressesmentioning

confidence: 99%

Effects of Combined Abiotic Stresses Related to Climate Change on Root Growth in Crops

2022

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Climate change is a major threat to crop productivity that negatively affects food security worldwide. Increase in global temperatures are usually accompanied by drought, flooding and changes in soil nutrients composition that dramatically reduced crop yields. Against the backdrop of climate change, human population increase and subsequent rise in food demand, finding new solutions for crop adaptation to environmental stresses is essential. The effects of single abiotic stress on crops have been widely studied, but in the field abiotic stresses tend to occur in combination rather than individually. Physiological, metabolic and molecular responses of crops to combined abiotic stresses seem to be significantly different to individual stresses. Although in recent years an increasing number of studies have addressed the effects of abiotic stress combinations, the information related to the root system response is still scarce. Roots are the underground organs that directly contact with the soil and sense many of these abiotic stresses. Understanding the effects of abiotic stress combinations in the root system would help to find new breeding tools to develop more resilient crops. This review will summarize the current knowledge regarding the effects of combined abiotic stress in the root system in crops. First, we will provide a general overview of root responses to particular abiotic stresses. Then, we will describe how these root responses are integrated when crops are challenged to the combination of different abiotic stress. We will focus on the main changes on root system architecture (RSA) and physiology influencing crop productivity and yield and convey the latest information on the key molecular, hormonal and genetic regulatory pathways underlying root responses to these combinatorial stresses. Finally, we will discuss possible directions for future research and the main challenges needed to be tackled to translate this knowledge into useful tools to enhance crop tolerance.

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Effect of drought and carbon dioxide on nutrient uptake and levels of nutrient‐uptake proteins in roots of barley

Cited by 20 publications

References 59 publications

CO2 Responses of Winter Wheat, Barley and Oat Cultivars under Optimum and Limited Irrigation

CO2 Responses of Winter Wheat, Barley and Oat Cultivars under Optimum and Limited Irrigation

Effects of nitrogen fertilization and drought on hydrocyanic acid accumulation and morpho‐physiological parameters of sorghums

Effects of Combined Abiotic Stresses Related to Climate Change on Root Growth in Crops

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