scholarly journals Nitrogen Remobilization and N-P-K Concentration of Wheats of Different Ploidy Levels Respond Differently to Nitrogen Supply

2021 ◽  
Vol 10 (4) ◽  
Keyword(s):  
Nitrogen Supply ◽  
Nitrogen Remobilization ◽  
Ploidy Levels ◽  
K Concentration

scholarly journals Approach of monocarpic senescence control by nitrogen manipulation in mungbean and cowpea

2018 ◽  
Vol 16 (3) ◽  
pp. 386-395
Author(s):  
Md. Matiul Islam ◽  
Seijun Sakamoto ◽  
Shao -Hui Zheng
Keyword(s):  
Glycine Max ◽  
Nitrogen Supply ◽  
Nitrogen Remobilization ◽  
Vigna Sinensis ◽  
Low Concentration ◽  
Nitrogen Redistribution ◽  
Nitrogen Concentrations ◽  
Glycine Max L ◽  
Cowpea Variety ◽  
Monocarpic Senescence

Pods start growing almost at the same time and mature simultaneously in soybean (Glycine max (L.) Merrill) plants. But mungbean (Vigna radiata L. Wilczek) and cowpea (Vigna sinensis Endl.) perform unsynchronized pod maturity. To overcome unsynchronized pod maturity the nitrogen redistribution aspects of mungbean and cowpea were investigated based on the linkage of soybean. Pot experiment was conducted using a nodulating mungbean variety (cv. XANH NINH THUAN) in 2015 and cowpea variety (cv. IT98K-205-8) in 2016 in the vinyl house at Saga University in Japan. During the experiment, nutrient solution was applied by changing nitrogen concentrations to 5, 25 and 100 ppm (control). Mungbean plants provided with low concentration of 5 and 25 ppm of nitrogen supply was not capable to produce continuous pods. Cowpea plants supplied with low concentration of nitrogen was also unable to produce successful pods continuously. Insufficient nitrogen hampered the continuation of pod setting in both the cases, might be due to, all the vegetative stored nitrogen had been utilized for seed development during the vegetative phase before pod setting. In case of 100 ppm nitrogen supply, for both mungbean and cowpea, no senescence and nitrogen remobilization occurred. However, researches showed that soybean typically undergoes the remobilization evidence, i.e., monocarpic senescence, in 100 ppm of nitrogen supply. J.Bangladesh Agril. Univ. 16(3): 386–395, December 2018

Genetic variation in sodium and potassium concentration in herbage of Digitaria milanjiana, and its relation to provenance

1985 ◽  
Vol 36 (2) ◽  
pp. 201 ◽  
Author(s):  
JB Hacker ◽  
RW Strickland ◽  
KE Basford
Keyword(s):  
Annual Rainfall ◽  
Genetic Studies ◽  
Ploidy Levels ◽  
Low Concentrations ◽  
African Grass ◽  
Low Levels ◽  
High Concentrations ◽  
K Concentration ◽  
Diploid Level ◽  
Sodium And Potassium

Sixty-five accessions, including diploids, tetraploids and hexaploids, of the African grass Digitaria milanjiana, were grown in a grass garden in south-eastern Queensland, and sodium (Na) and potassium (K) concentrations of herbage were determined after regrowth periods of either 6 weeks or 6 months. The accessions were originally obtained from sites in Africa from l�S. to 25�S., and over 400-1700 mm mean annual rainfall. The Na concentration of herbage ranged from 0.01 to 2.30% (w/w) and was inversely correlated with K concentration. There was a clearly defined geographic distribution of accessions which had high or low Na concentrations. Accessions from coastal sites had high concentrations of Na in the dry matter (>0.25% DM), those from inland sites south of 20�S. had low concentrations of Na (usually <0.24% DM), and all those from inland sites north of latitude 20' S. were invariably very low in Na concentration (<0.09% DM). Accessions with high and low levels of Na occurred at all three ploidy levels. Genetic studies at the diploid level, using generation means analysis, showed differing patterns of inheritance of Na and K concentration for two crosses, even though they had one parent in common. Both additive and dominance effects were evident for Na and K; in addition, significant inter-allelic interactions occurred, especially involving dominance. The results are discussed in relation to the adaptive significance of Na accumulation, to its significance in animal production, and to the possibilities of breeding cultivars that have adequate Na concentration and are adapted to low rainfall regions.

Effect of potassium and nitrogen supply on the distribution of minerals and organic acids and the composition of grape juice of Sultana vines

1989 ◽  
Vol 29 (1) ◽  
pp. 133 ◽  
Author(s):  
EH Ruhl
Keyword(s):  
Organic Acids ◽  
Nitrogen Source ◽  
Sugar Content ◽  
Grape Juice ◽  
Nitrogen Supply ◽  
Fruit Yield ◽  
Juice Quality ◽  
K Concentration

Fruiting Sultana vines grown under glasshouse conditions were supplied with 2 K+ levels (0.05 or 0.15 g K+/week) and fertilised with either NH4+ [as (NH4)2SO4] or NO3- [as Ca(NO3)2] as a nitrogen source. Enhanced K+ supply (0.15 g/week) increased K+ concentration in laminae by 1896, in petioles by 59% and in stems by 23%, and reduced Mg2+ of laminae and petioles by 18 and 24% respectively, while Ca2+ was not effected. K+ supply had no effect on tartrate or malate concentration in laminae, stem or roots. Use of NO3- instead of NH4+ as a nitrogen source led to 220% higher citrate and 168% higher malate concentrations in laminae. In roots NO3- supply caused 61% higher citrate, 41% higher tartrate and 26% higher malate concentrations. Higher K+ fertilisation (0.15 g/week) had no effect on fruit yield or sugar content, but increased grape juice pH from 3.95 to 4.08, malate concentration from 0.94 to 1.20 g/ L and K+ concentration from 46.8 to 56.8 mmol/L, thereby causing lower grape juice quality.

Impact of : ratio and nitrogen supply on nitrogen remobilization in potted chrysanthemum grown in a subirrigation system

2014 ◽  
Vol 94 (5) ◽  
pp. 867-880
Author(s):  
William N. MacDonald ◽  
M. James Tsujita ◽  
Theo J. Blom ◽  
Barry J. Shelp
Keyword(s):  
Nitrogen Supply ◽  
N Use Efficiency ◽  
Nitrate Content ◽  
Nitrogen Remobilization ◽  
Nitrate Accumulation ◽  
Inflorescence Development ◽  
Total N ◽  
N Supply ◽  
Use Efficiency ◽  
N Use

MacDonald, W. N., Tsujita, M. J., Blom, T. J. and Shelp, B. J. 2014. Impact of [Formula: see text]:[Formula: see text] ratio and nitrogen supply on nitrogen remobilization in potted chrysanthemum grown in a subirrigation system. Can. J. Plant Sci. 94: 867–880. Subirrigation is being adopted as an environmentally friendly strategy for managing the nutrition of potted greenhouse plants. Here, we investigated two strategies for enhancing the remobilization of N during the development of the inflorescence in subirrigated potted chrysanthemum (Chrysanthemum morifolium Ramat.) in an attempt to improve nitrogen (N) use efficiency. (1) The replacement of a portion of the nitrate in the nutrient solution with ammonium decreased the nitrate content, especially in the stem plus petioles, and increased the reduced N content early in the growth cycle, but did not improve N use efficiency. (2) The use of a lower N supply (200 vs. 400 mg total N per pot delivered over 3 and 5 wk, respectively), either as nitrate or ammonium nitrate, eliminated nitrate accumulation prior to inflorescence development, thereby improving N use efficiency. Inflorescence quality was unaffected; however, at the lower N level there was some evidence of chlorosis on the oldest leaves. Thus, there may be considerable potential to reduce the N supply in a commercial greenhouse setting as long as an adequate supply is provided early in the growing period.

Hair cell changes after cationic stimulation of corti's organ

1989 ◽  
Vol 47 ◽  
pp. 798-799
Author(s):  
Cesar D. Fermin ◽  
Hans-Peter Zenner
Keyword(s):  
Organ Of Corti ◽  
Cross Sectional ◽  
Surface Areas ◽  
High K ◽  
Anatomical Arrangement ◽  
Cell Cytosol ◽  
High Concentrations ◽  
K Concentration ◽  
Cell Changes

Contraction of outer and inner hair cells (OHC&IHC) in the Organ of Corti (OC) of the inner ear is necessary for sound transduction. Getting at HC in vivo preparations is difficult. Thus, isolated HCs have been used to study OHC properties. Even though viability has been shown in isolated (iOHC) preparations by good responses to current and cationic stimulation, the contribution of adjoining cells can not be explained with iOHC preparations. This study was undertaken to examine changes in the OHC after expossure of the OHC to high concentrations of potassium (K) and sodium (Na), by carefully immersing the OC in either artifical endolymph or perilymph. After K and Na exposure, OCs were fixed with 3% glutaraldehyde, post-fixed in osmium, separated into base, middle and apex and embedded in Araldite™. One μm thick sections were prepared for analysis with the light and E.M. Cross sectional areas were measured with Bioquant™ software.Potassium and sodium both cause isolated guinea pig OHC to contract. In vivo high K concentration may cause uncontrolled and sustained contractions that could contribute to Meniere's disease. The behavior of OHC in the vivo setting might be very different from that of iOHC. We show here changes of the cell cytosol and cisterns caused by K and Na to OHC in situs. The table below shows results from cross sectional area measurements of OHC from OC that were exposed to either K or Na. As one would expect, from the anatomical arrangement of the OC, OHC#l that are supported by rigid tissue would probably be displaced (move) less than those OHC located away from the pillar. Surprisingly, cells in the middle turn of the cochlea changed their surface areas more than those at either end of the cochlea. Moreover, changes in surface area do not seem to differ between K and Na treated OCs.

Nitrogen distribution in young Norway spruce (Picea abies) trees as affected by pedospheric nitrogen supply

1997 ◽  
Vol 101 (4) ◽  
pp. 764-769 ◽  
Author(s):  
Heike Stoermer ◽  
Bettina Seith ◽  
Ulrike Hanemann ◽  
Eckhard George ◽  
Heinz Rennenberg
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Nitrogen Supply ◽  
Nitrogen Distribution

Influence of increased nutrient supply on Microcystis aeruginosa at cellular and proteomic levels

2020 ◽  
Vol 85 ◽  
pp. 47-58
Author(s):  
Y Jiang ◽  
Y Liu
Keyword(s):  
Microcystis Aeruginosa ◽  
Regulatory Protein ◽  
Acid Synthesis ◽  
Nutrient Supply ◽  
Nitrogen Supply ◽  
Nitrogen And Phosphorus ◽  
Comprehensive Description ◽  
Amino Acid Synthesis ◽  
High Nutrient ◽  
Proteomic Responses

Various studies have observed that increased nutrient supply promotes the growth of bloom-forming cyanobacteria, but only a limited number of studies have investigated the influence of increased nutrient supply on bloom-forming cyanobacteria at the proteomic level. We investigated the cellular and proteomic responses of Microcystis aeruginosa to elevated nitrogen and phosphorus supply. Increased supply of both nutrients significantly promoted the growth of M. aeruginosa and the synthesis of chlorophyll a, protein, and microcystins. The release of microcystins and the synthesis of polysaccharides negatively correlated with the growth of M. aeruginosa under high nutrient levels. Overexpressed proteins related to photosynthesis, and amino acid synthesis, were responsible for the stimulatory effects of increased nutrient supply in M. aeruginosa. Increased nitrogen supply directly promoted cyanobacterial growth by inducing the overexpression of the cell division regulatory protein FtsZ. NtcA, that regulates gene transcription related to both nitrogen assimilation and microcystin synthesis, was overexpressed under the high nitrogen condition, which consequently induced overexpression of 2 microcystin synthetases (McyC and McyF) and promoted microcystin synthesis. Elevated nitrogen supply induced the overexpression of proteins involved in gas vesicle organization (GvpC and GvpW), which may increase the buoyancy of M. aeruginosa. Increased phosphorus level indirectly affected growth and the synthesis of cellular substances in M. aeruginosa through the mediation of differentially expressed proteins related to carbon and phosphorus metabolism. This study provides a comprehensive description of changes in the proteome of M. aeruginosa in response to an increased supply of 2 key nutrients.

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