Growth and physiological characterization of low nitrogen responses in Tibetan wild barley (<i>Hordeum spontaneum</i>) and cultivated barley (<i>Hordeum vulgare</i>)

Shah, Jawad Munawar; Asgher, Zeshan; Zeng, Jianbin; Quan, Xiaoyan; Ali, Essa; Shamsi, Imran Haider; Zhang, Guoping

doi:10.1080/01904167.2016.1262405

Cited by 10 publications

(9 citation statements)

References 34 publications

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“…Many studies confirmed that plants were also able to use organic N, including amino acids, peptides and proteins [ 23 ]. In this study the plants subjected to glycine showed N starvation symptoms, characterized by decreased total biomass and root/shoot length for all genotypes, which is in agreement with the previous studies [ 33 , 34 ]. Similarly, in lettuce, fresh and dry weight were significantly reduced under glycine-N supply as compared to nitrate N [ 35 ].…”

Section: Discussionsupporting

confidence: 93%

Genotypic Difference in the Responses to Nitrogen Fertilizer Form in Tibetan Wild and Cultivated Barley

Naz

Shen

Lwalaba

et al. 2021

Plants

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Nitrogen (N) availability and form have a dramatic effect on N uptake and assimilation in plants, affecting growth and development. In the previous studies, we found great differences in low-N tolerance between Tibetan wild barley accessions and cultivated barley varieties. We hypothesized that there are different responses to N forms between the two kinds of barleys. Accordingly, this study was carried out to determine the response of four barley genotypes (two wild, XZ16 and XZ179; and two cultivated, ZD9 andHua30) under 4Nforms (NO3−, NH4+, urea and glycine). The results showed significant reduction in growth parameters such as root/shoot length and biomass, as well as photosynthesis parameters and total soluble protein content under glycine treatment relative to other N treatments, for both wild and cultivated barley, however, XZ179 was least affected. Similarly, ammonium adversely affected growth parameters in both wild and cultivated barleys, with XZ179 being severely affected. On the other hand, both wild and cultivated genotypes showed higher biomass, net photosynthetic rate, chlorophyll and protein in NO3− treatment relative to other three N treatments. It may be concluded that barley undisputedly grows well under inorganic nitrogen (NO3−), however in response to the organic N wild barley prefer glycine more than cultivated barely.

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Section: Discussionsupporting

confidence: 93%

Genotypic Difference in the Responses to Nitrogen Fertilizer Form in Tibetan Wild and Cultivated Barley

Naz

Shen

Lwalaba

et al. 2021

Plants

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“…WUE was significantly greater under W2N2 and W2N3 than under the other treatments ( Table 7 ). Nitrogen fertilizer application at different growth stages can improve NUE ( Agyin-Birikorang et al, 2017 ; Shan et al, 2017 ). In the present study, NUpE was not affected by irrigation methods and could increase with increasing topdressing fertilizer ratio under all irrigation methods.…”

Section: Discussionmentioning

confidence: 99%

An Analysis Based on Japonica Rice Root Characteristics and Crop Growth Under the Interaction of Irrigation and Nitrogen Methods

Wang

Jia

et al. 2022

Front. Plant Sci.

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Water shortages and nitrogen (N) fertilizer overuse limit japonica rice production in Northeastern China. The interactions between water-saving irrigation and nitrogen management on rice root and shoot growth is still our research focus. Here, japonica rice (DN425) was subjected to the irrigation methods W1 (flooding irrigation), W2 [mild alternate wetting and drying irrigation (AWD); −10 kPa], W3 (severe AWD; −30 kPa), and different N fertilizer ratios were applied in different growth stages, namely, N1 (6:3:1:0), N2 (5:3:1:1), and N3 (4:3:2:1). From jointing to full heading stages, the highest photosynthate production capacity and root activity were obtained under W1N2. AWD markedly affected the root system and resulted in root senescence at later growth stages. Grain yield and N utilization efficiency were closely and positively correlated with the relative water content, crop growth rate (CGR), leaf area duration (LAD), the increase rate of root length density, root surface area density, and root volume density (RVD) from the jointing to full heading stages. This positive correlation was also observed in the increased rate of root bleeding sap (RBS) under W1N2 and CGR under W2N3. From full heading to maturity stages, N2 could promote root growth, LAD, and CGR under AWD to a greater extent than those under the other treatments. Water use efficiency (WUE) and N uptake efficiency (NUpE) were both negatively associated with the decreased rate of RVD, root dry weight (RDW), and RBS. They were closely and positively correlated with the increased rate of RDW and CGR. Our results suggested that W2N2 treatment delayed root senescence, maintained leaf photosynthesis, optimized the crop growth rate from full heading to maturity stages, and improved grain yield. The optimal grain yield, WUE, and NUpE were achieved at the irrigation water amount and topdressing fertilizer ratio of 41.40–50.34 × 102 and 31.20–34.83 kg ha–1, respectively.

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“…During vegetative growth, plants uptake more N; thus, the shoots and roots incorporate a large quantity of N to increase biomass [32]. In wheat, total biomass, straw biomass and straw N content had a significant positive correlation with yield under N sufficient and deficient conditions [33].…”

Section: Effect Of N Fertilizers On Crop Growth and Yieldmentioning

confidence: 96%

Advances in Understanding the Molecular Mechanisms and Potential Genetic Improvement for Nitrogen Use Efficiency in Barley

et al. 2020

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Nitrogen (N) fertilization plays an important role in crop production; however, excessive and inefficient use of N fertilizer is a global issue that incurs high production costs, pollutes the environment and increases the emission of greenhouse gases. To overcome these negative consequences, improving nitrogen use efficiency (NUE) would be a key factor for profitable crop production either by increasing yield or reducing fertilizer cost. In contrast to soil and crop management practices, understanding the molecular mechanisms in NUE and developing new varieties with improved NUE is more environmentally and economically friendly. In this review, we highlight the recent progress in understanding and improving nitrogen use efficiency in barley, with perspectives on the impact of N on plant morphology and agronomic performance, NUE and its components such as N uptake and utilization, QTLs and candidate genes controlling NUE, and new strategies for NUE improvement.

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Growth and physiological characterization of low nitrogen responses in Tibetan wild barley (Hordeum spontaneum) and cultivated barley (Hordeum vulgare)

Cited by 10 publications

References 34 publications

Genotypic Difference in the Responses to Nitrogen Fertilizer Form in Tibetan Wild and Cultivated Barley

Genotypic Difference in the Responses to Nitrogen Fertilizer Form in Tibetan Wild and Cultivated Barley

An Analysis Based on Japonica Rice Root Characteristics and Crop Growth Under the Interaction of Irrigation and Nitrogen Methods

Advances in Understanding the Molecular Mechanisms and Potential Genetic Improvement for Nitrogen Use Efficiency in Barley

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