scholarly journals TaNRT2.1-6B is a dual-affinity nitrate transporter contributing to nitrogen uptake in bread wheat under both nitrogen deficiency and sufficiency

2022 ◽  
Author(s):  
Mengjiao Li ◽  
Tian Wang ◽  
Hui Zhang ◽  
Shuo Liu ◽  
Wenhu Li ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Nitrogen Uptake ◽  
Nitrogen Deficiency ◽  
Nitrate Transporter

The availability of mineral nitrogen in a wheat soil from southern New South Wales

1962 ◽  
Vol 2 (6) ◽  
pp. 185 ◽  
Author(s):  
RR Storrier
Keyword(s):  
Nitrogen Uptake ◽  
New South ◽  
New South Wales ◽  
Nitrogen Deficiency ◽  
Ammonia Nitrogen ◽  
Mineral Nitrogen ◽  
Wheat Crop ◽  
Wagga Wagga ◽  
Emergence Period ◽  
South Wales

In a red-brown earth soil from Wagga Wagga the fluctuations in the level of mineral nitrogen (ammonia plus nitrate-nitrogen) and its availability to wheat under growing period rainfalls of 6 inches and 16 inches were studied. Ammonia-nitrogen did not exceed 8 lb nitrogen per acre 6 inches but showed statistically significant short term fluctuations. Mineral nitrogen decreased steadily from the 4-5 leaf stage of plant growth, reaching minimum values in the ear-emergence period when a temporary nitrogen deficiency occurred. Following rainfalls of about one inch or more, conditions favoured biological activity and nitrogen was mineralized, absorbed by the crop and/or leached down the profile. In one season a release of mineral nitrogen about two weeks before flowering contributed an estimated 20-30 per cent of the total nitrogen uptake of the crop. Nitrogen uptake by the wheat crop ceased after flowering and subsequent changes in mineral nitrogen level reflect the net result of mineralization and demineralization processes, and nitrogen uptake by weeds, particularly skeleton weed. Absorption of nitrogen from the profile depended upon seasonal conditions, with the surface 18 inches suppling the greater part of the nitrogen absorbed by the crop. This indicates the need to sample regularly to at least a depth of 18 inches, particularly during the period from 4-5 leaf to flowering, when studying the relation between mineral nitrogen and crop growth. The data suggest that the response of wheat, as measured by grain yield and protein content, to the higher levels of mineral nitrogen in the improved soils of southern New South Wales is determined by soil moisture levels, particularly in the post-flowering period.

scholarly journals Pengaruh Pupuk Hayati Endofitik Dengan Azolla Pinnata Terhadap Serapan N , N-Total Tanah, Dan Bobot Kering Tanaman Padi (Oryza Sativa L.) Pada Tanah Salin

Agrologia ◽  
2018 ◽  
Vol 6 (2) ◽  
Author(s):  
Alin Kusumah Dewi ◽  
Mieke Rochimi Setiawati
Keyword(s):  
Nitrogen Uptake ◽  
Endophytic Bacteria ◽  
Saline Soil ◽  
Oryza Sativa L ◽  
Block Design ◽  
Nitrogen Deficiency ◽  
Dry Weight ◽  
Biological Properties ◽  
Azolla Pinnata ◽  
Total N

Saline soil contain excessive NaCl content which inhibit plant growth and lead to nitrogen deficiency. Endophytic bacteria live inside the plant tissue and has the ability to fix nitrogen directly from the atmosphere, meanwhile Azolla pinnata can be used as organic ameliorant that able to increase the number of availability nitrogen for plant in soil, and improve the physical, chemical, and biological properties of soil. The aims of this experiment were to find out the treatment that cause highest nitrogen uptake by plant, total-N of soil, and dry weight of rice in saline soil. The experimental design was randomized block design with eight treatments and four repetitions. The results showed that the application of biofertilizer and ameliorant increased nitrogen uptake by plant and dry weight of rice in saline soil, but there was no significant effect on  total-N of soil. This experiment suggested that endophytic bacteria biofertilizer and Azolla pinnata were effective to increase dry weight and nitrogen uptake of rice grown in soil with EC between  2 dS m-1 - 4 dS m-1.

scholarly journals Effects of waterlogging during grain filling on yield components, nitrogen uptake and grain quality in bread wheat

2019 ◽  
Vol 47 (1) ◽  
pp. 42-52
Author(s):  
A.F. Arata ◽  
M.I. Dinolfo ◽  
M. Martínez ◽  
L. Lázaro
Keyword(s):  
Bread Wheat ◽  
Nitrogen Uptake ◽  
Yield Components ◽  
Grain Quality ◽  
Grain Filling

scholarly journals Sedimentary Nitrogen Uptake & Assimilation in the Temperate Zooxanthellate Anemone Anthopleura aureoradiata

2021 ◽  
Author(s):  
◽  
Shyam Ravi Morar
Keyword(s):  
Nitrogen Uptake ◽  
Littoral Zone ◽  
Carbon Fixation ◽  
Nitrogen Deficiency ◽  
Dry Weight ◽  
Rocky Intertidal ◽  
Nitrogen Status ◽  
Particulate Nitrogen ◽  
Sediment Treatment ◽  
Algal Symbionts

<p>This study investigated the potential for, and efficiency of, particulate nitrogen uptake from the sediment and subsequent consequences of this on the nutrient status of endosymbiotic dinoflagellates (zooxanthellae) in the temperate zooxanthellate anemone Anthopleura aureoradiata. Sediment was collected from a mudflat and labelled with (15NH4)2SO4 before being provided to A. aureoradiata at low (5 g dry weight) and high sediment (20 g dry weight) loads for 6 hours. While no discernible change in the isotopic content of the sediment could be detected, analysis of the host and algal symbionts revealed that 15N had been taken up. Uptake by the host was similar at both high and low sediment loads, but the algal symbionts acquired more nitrogen at the lower load (1.13 versus 0.93 atom % 15N in the low and high loads, respectively). Evaluation of this particulate nitrogen uptake from the sediment was further examined by measuring the nitrogen status of the zooxanthellae. This was determined by measuring the extent to which ammonium (40 muM NH+4) enhanced the rate of zooxanthellar dark carbon fixation above that seen in filtered seawater (FSW) alone; the enhancement ratio was expressed as [dark NH+4 rate/dark FSW rate]. VD'/VL, a further index of nitrogen status, was also calculated where VD' = [dark NH+4 rate - dark FSW rate] and VL = rate of carbon fixation in the light. When anemones were starved for 2-8 weeks, zooxanthellar nitrogen deficiency became apparent at greater than or equal to 4 weeks, with NH+4/FSW and VD'/VL averaging up to 2.90 and 0.11, respectively. In comparison, when anemones were fed 5 times per week for 8 weeks the addition of ammonium had little effect, indicating nitrogen sufficiency; NH+4/FSW and VD'/VL values were 1.03 and -1.0 x 10-3, respectively. The nitrogen status of zooxanthellae from anemones starved and incubated with and without sediment was examined with no apparent difference between sediment and no sediment treatments; zooxanthellar nitrogen deficiency became apparent at greater than or equal to 4 weeks in both treatments, with NH+4/FSW and VD'/VL averaging up to 3.73 and 0.17 for the sediment treatment and 2.74 and 0.15 for the no sediment treatment, respectively. The nitrogen status of zooxanthellae from anemones found on a mudflat (Pauatahanui Inlet) and a rocky intertidal site (Kau Bay) was different. Zooxanthellae from mudflat anemones were nitrogen sufficient with NH+4/FSW and VD'/VL values averaging up to 1.26 and -6.0 x 10-3, respectively. Nitrogen deficient zooxanthellae were present in anemones from the rocky intertidal. Anemones from tide pools in the upper littoral zone had NH+4/FSW and VD'/VL values of 2.99 and 0.11, respectively, while anemones from the mid littoral zone had NH+4/FSW and VD'/VL of 2.90 and 0.13, respectively; there was no significant difference in nitrogen status between zooxanthellae from high shore tide pool anemones and aerially exposed mid-littoral anemones. These results suggest that while particulate nitrogen can be taken up from the sediment by this species, dissolved inorganic nitrogen such as ammonium in the seawater, and especially the interstitial water surrounding infaunal anemones on mudflats, may be a more important source of nitrogen in the field.</p>

scholarly journals Nitrogen in Flowers

2021 ◽  
Author(s):  
Soraya Ruamrungsri ◽  
Kanokwan Panjama ◽  
Takuji Ohyama ◽  
Chaiartid Inkham
Keyword(s):  
Life Cycle ◽  
Nitrogen Uptake ◽  
Crop Production ◽  
Growth Stage ◽  
Nitrogen Deficiency ◽  
Nitrogen Supply ◽  
Stem Length ◽  
Tagetes Erecta ◽  
Optimum Level ◽  
Reproductive Phases

This chapter explores the literature and research on nitrogen in flowers. An overview of nitrogen deficiency symptoms in some flowers, i.e., Curcuma alismatifolia (ornamental curcuma), Tagetes erecta (marigold), Zinnia violacea (zinnia), and Gomphrena globose (gomphrena) were presented. Additionally, nitrogen uptake, translocation, and application in some flowers, i.e., ornamental curcuma, narcissus, orchids, and rose, were discussed in this chapter. Nitrogen affects the life cycle of flower, including vegetative and reproductive phases. Flower size, stem length, number of flowers per plant, and color were reduced by nitrogen deficiency. Therefore, the optimum level of nitrogen supply in each growth stage is important for flower crop production.

scholarly journals Sedimentary Nitrogen Uptake & Assimilation in the Temperate Zooxanthellate Anemone Anthopleura aureoradiata

2021 ◽  
Author(s):  
◽  
Shyam Ravi Morar
Keyword(s):  
Nitrogen Uptake ◽  
Littoral Zone ◽  
Carbon Fixation ◽  
Nitrogen Deficiency ◽  
Dry Weight ◽  
Rocky Intertidal ◽  
Nitrogen Status ◽  
Particulate Nitrogen ◽  
Sediment Treatment ◽  
Algal Symbionts

<p>This study investigated the potential for, and efficiency of, particulate nitrogen uptake from the sediment and subsequent consequences of this on the nutrient status of endosymbiotic dinoflagellates (zooxanthellae) in the temperate zooxanthellate anemone Anthopleura aureoradiata. Sediment was collected from a mudflat and labelled with (15NH4)2SO4 before being provided to A. aureoradiata at low (5 g dry weight) and high sediment (20 g dry weight) loads for 6 hours. While no discernible change in the isotopic content of the sediment could be detected, analysis of the host and algal symbionts revealed that 15N had been taken up. Uptake by the host was similar at both high and low sediment loads, but the algal symbionts acquired more nitrogen at the lower load (1.13 versus 0.93 atom % 15N in the low and high loads, respectively). Evaluation of this particulate nitrogen uptake from the sediment was further examined by measuring the nitrogen status of the zooxanthellae. This was determined by measuring the extent to which ammonium (40 muM NH+4) enhanced the rate of zooxanthellar dark carbon fixation above that seen in filtered seawater (FSW) alone; the enhancement ratio was expressed as [dark NH+4 rate/dark FSW rate]. VD'/VL, a further index of nitrogen status, was also calculated where VD' = [dark NH+4 rate - dark FSW rate] and VL = rate of carbon fixation in the light. When anemones were starved for 2-8 weeks, zooxanthellar nitrogen deficiency became apparent at greater than or equal to 4 weeks, with NH+4/FSW and VD'/VL averaging up to 2.90 and 0.11, respectively. In comparison, when anemones were fed 5 times per week for 8 weeks the addition of ammonium had little effect, indicating nitrogen sufficiency; NH+4/FSW and VD'/VL values were 1.03 and -1.0 x 10-3, respectively. The nitrogen status of zooxanthellae from anemones starved and incubated with and without sediment was examined with no apparent difference between sediment and no sediment treatments; zooxanthellar nitrogen deficiency became apparent at greater than or equal to 4 weeks in both treatments, with NH+4/FSW and VD'/VL averaging up to 3.73 and 0.17 for the sediment treatment and 2.74 and 0.15 for the no sediment treatment, respectively. The nitrogen status of zooxanthellae from anemones found on a mudflat (Pauatahanui Inlet) and a rocky intertidal site (Kau Bay) was different. Zooxanthellae from mudflat anemones were nitrogen sufficient with NH+4/FSW and VD'/VL values averaging up to 1.26 and -6.0 x 10-3, respectively. Nitrogen deficient zooxanthellae were present in anemones from the rocky intertidal. Anemones from tide pools in the upper littoral zone had NH+4/FSW and VD'/VL values of 2.99 and 0.11, respectively, while anemones from the mid littoral zone had NH+4/FSW and VD'/VL of 2.90 and 0.13, respectively; there was no significant difference in nitrogen status between zooxanthellae from high shore tide pool anemones and aerially exposed mid-littoral anemones. These results suggest that while particulate nitrogen can be taken up from the sediment by this species, dissolved inorganic nitrogen such as ammonium in the seawater, and especially the interstitial water surrounding infaunal anemones on mudflats, may be a more important source of nitrogen in the field.</p>

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