Nitrogen Metabolism During Storage in Relation to the Breakdown of Apples. I. Changes in protein nitrogen level in relation to incidence

Protein nitrogen content was followed in fruits of four apple varieties during cool storage under conditions designed to induce different rates of water loss. Increase in protein nitrogen content during cool storage did not appear to be related to the development of breakdown. High nitrogen level in the fruit, high relative humidity in the storage atmosphere, and advanced maturity at harvest all increased susceptibility to breakdown, but only the first of these factors influenced the protein nitrogen level. An inverse relationship between percentage water loss and breakdown incidence was demonstrated.

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Metabolomics Analysis Reveals Potential Mechanisms in Bupleurum L. (Apiaceae) Induced by Three Levels of Nitrogen Fertilization

Agronomy ◽

10.3390/agronomy11112291 ◽

2021 ◽

Vol 11 (11) ◽

pp. 2291

Author(s):

Jialin Sun ◽

Weinan Li ◽

Ye Zhang ◽

Yun Guo ◽

Zejia Duan ◽

...

Keyword(s):

Nitrogen Fertilization ◽

Total Content ◽

Nitrogen Level ◽

Gas Chromatography Mass Spectrometry ◽

Control Group ◽

High Nitrogen ◽

Yield And Quality ◽

High Nitrogen Level ◽

The Impact ◽

The Relationship

Bupleurum (Apiaceae) is widely used in traditional Chinese medicine to treat inflammatory and infectious diseases. Although roots are the only used parts in China, other countries use the whole plant. The yield and quality of Bupleurum depend mainly on fertilizers, especially nitrogen. The current study aimed to assess the relationship between the nitrogen fertilization level and the quality and metabolomic response of different parts (flowers, main shoots, lateral shoots and roots) of Bupleurum to three nitrogen fertilization levels (control group: 0 kg·ha−1; low-nitrogen group: 55 kg·ha−1; high-nitrogen group: 110 kg·ha−1). The results showed that a high nitrogen level increases Bupleurum yield and quality parameters only in aerial parts, especially flowers, but has no significant effect on roots. The HPLC method was exploited for simultaneous quantification of three saikosaponins (A, C and D), which are the main bioactive components in the plant. It was found that the total content of saikosaponins decreased with high nitrogen fertilization in roots but significantly increased in flowers. Moreover, nitrogen fertilizer promoted the content of saikosaponin A but inhibited saikosaponins C and saikosaponins D in most parts of the plant. To study the response of primary metabolites, we adopted gas chromatography–mass spectrometry (GC−MS) analysis; 84 metabolites were identified that were mostly up-regulated with a high nitrogen level in flowers but down-regulated in roots. Four differential metabolites—D-fructose, lactose, ether and glycerol—were recognized as key metabolites in Bupleurum under nitrogen fertilization. Meanwhile, The Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment results explained that the impact of nitrogen fertilization on Bupleurum was attributed to the C-metabolism, N-metabolism, and lipids metabolism. This research put forward new insights into potential mechanisms and the relationship between the quality and yield of Bupleurum and nitrogen fertilization.

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Effect of ammonium on growth of plant cells (Ipomoea sp.) in suspension cultures

Canadian Journal of Botany ◽

10.1139/b75-218 ◽

1975 ◽

Vol 53 (17) ◽

pp. 1942-1949 ◽

Cited By ~ 20

Author(s):

Dyson Rose ◽

S. M. Martin

Keyword(s):

Nitrogen Content ◽

Dry Weight ◽

Second Phase ◽

Growth Phases ◽

High Nitrogen Content ◽

High Nitrogen ◽

Batch Cultures ◽

High Nitrogen Level ◽

Ammonium Level ◽

Two Phases

Maintenance of the ammonium level in batch cultures of a plant cell line initiated from Ipomoea root tissue resulted in cells with a higher nitrogen content and a greater total accumulation of nitrogen in the cells. Utilization of nitrate was not suppressed. The increased supply of ammonium did not, by itself, increase the yield of dry cells, but it did permit a twofold or greater increase in cell yield when sucrose was added subsequently.Supplementary feeding of ammonium and sucrose to a batch culture that had exhausted the initial supply of ammonium rapidly returned the cells to a state of high nitrogen content, favored further utilization of nitrate, and greatly increased cell yield.These results are discussed in terms of growth phases. The presence of ammonium in the medium appeared to induce and maintain a growth phase characterized by a high nitrogen level in the cells. After the ammonium supply was depleted a second phase occurred, characterized by a rapid increase in dry weight without proportional accumulation of nitrogen. This second phase was not caused by a limiting rate of nitrate utilization, nor was it directly related to observed pH changes. We conclude that the two phases relate to the presence and absence of ammonium in the medium.

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Low-temperature induced floret sterility in the rice cultivars Calrose and Inga as influenced by nitrogen supply

Australian Journal of Experimental Agriculture ◽

10.1071/ea9840255 ◽

1984 ◽

Vol 24 (125) ◽

pp. 255 ◽

Cited By ~ 20

Author(s):

DP Heenan

Keyword(s):

Low Temperature ◽

Pollen Development ◽

Nitrogen Supply ◽

Nitrogen Level ◽

Rice Cultivars ◽

High Nitrogen ◽

Nitrogen Levels ◽

High Nitrogen Level ◽

Temperature Controlled

An experiment in temperature-controlled glasshouse chambers at Yanco Agricultural Institute examined floret sterility in lnga and Calrose rice induced by low temperature and high nitrogen level. Low temperature (12�C) ,for 4 d during microsporogenesis and anthesis produced considerable sterility in both cultivars; lnga was more sensitive than Calrose. Sensitivity was greatest when florets from the mid-section of the panicle were passing through the early microspore phase of pollen development. At both stages, the amount of low-temperature induced sterility was increased by high nitrogen supply. In the absence of low temperature, high nitrogen levels induced sterility in lnga only.

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Facile synthesis of nitrogen-doped unzipped carbon nanotubes and their electrochemical properties

RSC Advances ◽

10.1039/c4ra15008b ◽

2015 ◽

Vol 5 (11) ◽

pp. 8175-8181 ◽

Cited By ~ 16

Author(s):

Liang Chen ◽

Haihui Zhou ◽

Shudan Wei ◽

Zhongxue Chen ◽

Zheng Huang ◽

...

Keyword(s):

Carbon Nanotubes ◽

Electrochemical Properties ◽

Nitrogen Level ◽

High Nitrogen ◽

Facile Synthesis ◽

Nitrogen Doped ◽

Surface Areas ◽

Good Crystallinity ◽

High Nitrogen Level

N-UCNTs with a high nitrogen level, large surface areas and good crystallinity are synthesized by pyrolysis of an O-UCNTs/melamine composite.

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Nitrogen doped activated carbon/graphene with high nitrogen level: Green synthesis and thermo-electrical properties of its nanofluid

Materials Letters ◽

10.1016/j.matlet.2015.03.110 ◽

2015 ◽

Vol 152 ◽

pp. 192-195 ◽

Cited By ~ 35

Author(s):

Seyed Farid Seyed Shirazi ◽

Samira Gharehkhani ◽

Hooman Yarmand ◽

Ahmad Badarudin ◽

Hendrik Simon Cornelis Metselaar ◽

...

Keyword(s):

Activated Carbon ◽

Electrical Properties ◽

Green Synthesis ◽

Nitrogen Level ◽

High Nitrogen ◽

Nitrogen Doped ◽

High Nitrogen Level

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Molybdenum nutrition of rice under low and high nitrogen level

Plant and Soil ◽

10.1007/bf00015931 ◽

1977 ◽

Vol 46 (3) ◽

pp. 681-685 ◽

Cited By ~ 6

Author(s):

D. K. Das Gupta ◽

P. Basuchaudhuri

Keyword(s):

Nitrogen Level ◽

High Nitrogen ◽

High Nitrogen Level

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Influence of nitrogen supply on spring barley productivity and nitrate reductase activity

Acta Agrobotanica ◽

10.5586/aa.1982.019 ◽

2013 ◽

Vol 35 (2) ◽

pp. 191-203

Author(s):

U. Wojcieska ◽

E. Wolska ◽

M. Król

Keyword(s):

Nitrate Reductase ◽

Nitrate Reductase Activity ◽

Reductase Activity ◽

Spring Barley ◽

Nitrogen Level ◽

High Nitrogen ◽

Yield Increase ◽

Lateral Shoots ◽

Yield Structure ◽

High Nitrogen Level

The aim of the present study was to obtain some informations on the productivity of four chosen barley varieties growing at low and high nitrogen level. Some parameters of the yield structure and nitrate reductase activity were taken into consideration. It was found that there exist some differences in the yield between the compared varieties and some differences in their reaction to a high N level in the soil. The grain yield increase of the plants treated with high nitrogen doses was above all the result of the increase in dry matter of the lateral shoots and in leaf area. Distinct increase in the number of grains per ear and 1000-grains weight was also observed. The amount of reduced nitrogen collected during the growth season depended, in part, on the nitrate reductase activity and in part on the amount of the enzyme present in the plant. A rise of the nitrogen level caused an increase in nitrate reductase activity, in all varieties. The different influence of nitrogen on the growth of green organs in the compared varieties caused differences in the amount of the enzyme present in the plants and in protein yields.

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Poultry Manure as a Fertilizer

EDIS ◽

10.32473/edis-aa205-2013 ◽

2013 ◽

Vol 2013 (11) ◽

Cited By ~ 1

Author(s):

Michael A. Davis ◽

Doug R. Sloan ◽

Gerald Kidder ◽

R. D. Jacobs

Keyword(s):

Organic Matter ◽

Environmental Factors ◽

Nitrogen Content ◽

Soil Amendment ◽

Poultry Manure ◽

Nutrient Retention ◽

High Nitrogen Content ◽

High Nitrogen ◽

Animal Science ◽

Fact Sheet

Animal manures have been used as natural crop fertilizers for centuries. Because of poultry manure’s high nitrogen content, it has long been recognized as one of the most desirable manures. Besides fertilizing crops, manures also supply other essential plant nutrients and serve as a soil amendment by adding organic matter, which helps improve the soil’s moisture and nutrient retention. Organic matter persistence will vary with temperature, drainage, rainfall, and other environmental factors. This 2-page fact sheet was written by Michael A. Davis, D.R. Sloan, Gerald Kidder, and R.D. Jacobs, and published by the UF Department of Animal Science, November 2013. http://edis.ifas.ufl.edu/aa205

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