Nitrogen Modulates the Effects of Heat, Drought, and Combined Stresses on Photosynthesis, Antioxidant Capacity, Cell Osmoregulation, and Grain Yield in Winter Wheat

Ru, Chen; Wang, Kaifei; Hu, Xiaotao; Chen, Dianyu; Wang, Wenè; Yang, Haosheng

doi:10.1007/s00344-022-10650-0

Cited by 28 publications

(17 citation statements)

References 58 publications

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“…61 Supplying N promotes crop growth and development, further improving the yield and quality. 10 A full life cycle study demonstrated that CDs significantly improved the yield and quality of soybeans at the mature stage under drought stress (Figure S15a−c). The 18.5% increase in the N content of leaves resulted in a 2.0-fold increase in the net photosynthetic rate (Figure S15d).…”

Section: Resultsmentioning

confidence: 99%

“…N is an essential element for all living organisms, as well as for the biosynthesis of key cellular components (e.g., proteins and nucleic acids) . Supplying N promotes crop growth and development, further improving the yield and quality . A full life cycle study demonstrated that CDs significantly improved the yield and quality of soybeans at the mature stage under drought stress (Figure S15a–c).…”

Section: Resultsmentioning

confidence: 99%

“…N metabolism has a significant osmotic effect prior to its utilization in protein synthesis, and the subsequent increase in protein content may further enhance water uptake as a result of protein hydration . Additionally, N is also an integral part of proteins, nucleic acids, and chlorophyll in plants, and N deficiency is closely related to plant growth and food quality . Therefore, improving N utilization would be an effective way to improve the drought tolerance and nutritional quality of soybeans.…”

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confidence: 99%

“…9 Additionally, N is also an integral part of proteins, nucleic acids, and chlorophyll in plants, and N deficiency is closely related to plant growth and food quality. 10 Therefore, improving N utilization would be an effective way to improve the drought tolerance and nutritional quality of soybeans. Recently, nanoenabled agriculture is still in its infancy; however, it is a field with both opportunities and challenges.…”

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confidence: 99%

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Carbon Dots Improve Nitrogen Bioavailability to Promote the Growth and Nutritional Quality of Soybeans under Drought Stress

Wang

Cao

et al. 2022

ACS Nano

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The inefficient utilization of nitrogen (N) in soil and drought stress seriously threatens agricultural and food production. Herein, soil application of carbon dots (CDs, 5 mg kg–1) promoted the growth and nutritional quality of soybeans by improving N bioavailability, which was beneficial to alleviate the economic losses caused by drought stress. Soil application of CDs enhanced the N-fixing ability of nodules, regulated rhizosphere processes, and ultimately enhanced N and water uptake in soybeans under drought stress. Compared to control (drought stress), the application of CDs under drought stress enhanced soybean nitrogenase activity by 8.6% and increased N content in soybean shoots and roots by 18.5% and 14.8%, respectively. CDs in soil promoted the secretion of root exudates (e.g., organic acids, fatty acids, and polyketides) and regulated beneficial microbial communities (e.g., Proteobacteria, Acidobacteria, Gemmatimonadetes, and Actinobacteria), thus enhancing the N release from soil. Besides, compared to control, the expression of GmNRT, GmAMT, GmLB, and GmAQP genes in roots were upregulated by 1.2-, 1.8-, 2.7-, and 2.3-fold respectively, implying enhanced N transport and water uptake. Furthermore, the proteins, fatty acids, and amino acids in soybean grains were improved by 3.4%, 6.9%, and 17.3%, respectively, as a result of improved N bioavailability. Therefore, CD-enabled agriculture is promising for improving the drought tolerance and quality of soybeans, which is of significance for food security in facing the crisis of global climate change.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Carbon Dots Improve Nitrogen Bioavailability to Promote the Growth and Nutritional Quality of Soybeans under Drought Stress

Wang

Cao

et al. 2022

ACS Nano

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“…If the VIP value was greater than 1, it was considered to have a significant effect on IWUE. 26,27 Structural equation modeling (SEM) was conducted based on the data of leaves, petiole morphological and anatomical traits, gas exchange capacity, stomatal traits, WUE and yield obtained in 2021 using Amos version 25.0 software (SPSS Inc., Chicago, USA). The SEMs were evaluated by non-significant Chi-square (χ 2 ) tests (P > 0.05), root mean square error of approximation (RMSEA ≤ 0.1) and goodness-of-fit index (GFI > 0.90).…”

Section: Discussionmentioning

confidence: 99%

Deficit irrigation combined with nitrogen application in the early growth stage of sugar beet increases the production capacity of canopy and avoids yield loss

Zhou

Wang

et al. 2023

J Sci Food Agric

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BackgroundProperly reduced irrigation combined with nitrogen (N) application can be used to improve crop water use efficiency (WUE) in arid regions, but its effect on sugar beet is unknown at present. A two‐year field experiment was conducted to evaluate the effects of N application (N0, 0; N1, 150; N2, 225 kg N ha−1) on the canopy production capacity (CPC), yield and WUE of sugar beet under normal irrigation (W1, 70% of field capacity (FC)) and deficit irrigation (DI) (W2, 50% FC) in the early growth stage (EGS).ResultsThe results showed that the W2 treatment reduced the CPC by reducing gas exchange, leaf area index (LAI) and chlorophyll content (SPAD value) of sugar beet leaves compared to the W1 treatment. However, DI combined with N application increased these parameters. Specifically, N application increased the net photosynthetic rate by 40.7% by increased gas exchange, SPAD and LAI compared to the N0 treatment. In addition, N application increased WUE by 12.5% by increasing thickness of upper surface, stomatal aperture and cross‐sectional area of petiole. This ultimately led to a significant increase in taproot yield (TY; 19.7%) and sugar yield (SY; 57.6%). Although the TY of the N2 treatment was higher than that of the N1 treatment, the SY and WUE did not increase significantly and the harvest index decreased significantly by 9.3%.ConclusionDI combined with 150 kg N ha−1in the EGS of sugar beet increases the WUE in arid areas while avoiding yield loss by improving the CPC. © 2023 Society of Chemical Industry.

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Nitrogen deficiency tolerance conferred by introgression of a QTL derived from wild emmer into bread wheat

Govta,

Fatiukha,

Govta

et al. 2024

Theor Appl Genet

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Key message Genetic dissection of a QTL from wild emmer wheat, QGpc.huj.uh-5B.2, introgressed into bread wheat, identified candidate genes associated with tolerance to nitrogen deficiency, and potentially useful for improving nitrogen-use efficiency. Abstract Nitrogen (N) is an important macronutrient critical to wheat growth and development; its deficiency is one of the main factors causing reductions in grain yield and quality. N availability is significantly affected by drought or flooding, that are dependent on additional factors including soil type or duration and severity of stress. In a previous study, we identified a high grain protein content QTL (QGpc.huj.uh-5B.2) derived from the 5B chromosome of wild emmer wheat, that showed a higher proportion of explained variation under water-stress conditions. We hypothesized that this QTL is associated with tolerance to N deficiency as a possible mechanism underlying the higher effect under stress. To validate this hypothesis, we introgressed the QTL into the elite bread wheat var. Ruta, and showed that under N-deficient field conditions the introgression IL99 had a 33% increase in GPC (p < 0.05) compared to the recipient parent. Furthermore, evaluation of IL99 response to severe N deficiency (10% N) for 14 days, applied using a semi-hydroponic system under controlled conditions, confirmed its tolerance to N deficiency. Fine-mapping of the QTL resulted in 26 homozygous near-isogenic lines (BC4F5) segregating to N-deficiency tolerance. The QTL was delimited from − 28.28 to − 1.29 Mb and included 13 candidate genes, most associated with N-stress response, N transport, and abiotic stress responses. These genes may improve N-use efficiency under severely N-deficient environments. Our study demonstrates the importance of WEW as a source of novel candidate genes for sustainable improvement in tolerance to N deficiency in wheat.

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Nitrogen Modulates the Effects of Heat, Drought, and Combined Stresses on Photosynthesis, Antioxidant Capacity, Cell Osmoregulation, and Grain Yield in Winter Wheat

Cited by 28 publications

References 58 publications

Carbon Dots Improve Nitrogen Bioavailability to Promote the Growth and Nutritional Quality of Soybeans under Drought Stress

Carbon Dots Improve Nitrogen Bioavailability to Promote the Growth and Nutritional Quality of Soybeans under Drought Stress

Deficit irrigation combined with nitrogen application in the early growth stage of sugar beet increases the production capacity of canopy and avoids yield loss

Nitrogen deficiency tolerance conferred by introgression of a QTL derived from wild emmer into bread wheat

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