scholarly journals Respiration and Nutrient Absorption of Plant Roots Growing under Aerobic or Anaerobic Condition : 2. Respiration and nutrient absorption of rice roots growing under aerobic condition

1967 ◽  
Vol 36 (3) ◽  
pp. 228-232 ◽  
Author(s):  
Hiroki ARIKADO
Keyword(s):  
Anaerobic Condition ◽  
Aerobic Condition ◽  
Nutrient Absorption ◽  
Plant Roots ◽  
Rice Roots

Oxygen concentration affects frequency and range of transconjugants for the incompatibility (Inc) P-1 and P-7 plasmids pBP136 and pCAR1

2020 ◽  
Vol 85 (4) ◽  
pp. 1005-1015
Author(s):  
Kentaro Ochi ◽  
Maho Tokuda ◽  
Kosuke Yanagiya ◽  
Chiho Suzuki-Minakuchi ◽  
Hideaki Nojiri ◽  
...  
Keyword(s):  
Oxygen Concentration ◽  
Anaerobic Condition ◽  
Environmental Samples ◽  
Aerobic Condition ◽  
Recipient Strain ◽  
Donor Strain ◽  
Anaerobic Conditions ◽  
Filter Mating ◽  
Aerobic And Anaerobic ◽  
Aerobic And Anaerobic Conditions

ABSTRACT The frequency of transconjugants were compared for the incompatibility (Inc) P-1 and P-7 plasmids pBP136 and pCAR1 under aerobic and anaerobic conditions. Filter mating assays were performed with one donor strain and one recipient strain using different donors of Pseudomonas and recipient strains, including Pseudomonas, Pantoea, and Buttiauxella. Under anaerobic condition, frequencies of transconjugants for both plasmids were 101-103-fold lower than those under aerobic condition regardless of whether aerobically or anaerobically grown donors and recipients were used. To compare the transconjugant ranges under aerobic and anaerobic conditions, conjugation was performed between the donor of pBP136 and recipient bacteria extracted from environmental samples. Several transconjugants were uniquely obtained from each aerobic or anaerobic condition. Our findings indicate that a plasmid can differently spread among bacteria depending on the oxygen concentrations of the environment.

scholarly journals Incubation Studies on Exchangable Zn for Varying Levels of added Zn Under Aerobic and Anaerobic Conditions in Grey Terrace Soils, Non Calcarious Floodplain Soils and Calcarious Floodplain Soils

2013 ◽  
Vol 9 (1-2) ◽  
pp. 9-15 ◽  
Author(s):  
KH Talukder ◽  
IU Ahmed ◽  
MS Islam ◽  
MS Islam ◽  
M Asaduzzaman ◽  
...  
Keyword(s):  
Anaerobic Condition ◽  
Early Stage ◽  
Aerobic Condition ◽  
Anaerobic Conditions ◽  
Floodplain Soil ◽  
Zinc Fractions ◽  
Floodplain Soils ◽  
Soil Zn ◽  
Aerobic And Anaerobic ◽  
Aerobic And Anaerobic Conditions

Fractions studies were done to know how the zinc applied to different soils was distributed in to various fractions when the soils incubated under aerobic and anaerobic condition. The added zinc provided significant increase in exchangeable Zn both under aerobic and anaerobic conditions although anaerobic condition gave lower results than aerobic condition. The higher results were obtained at early stage of incubation and it gradually reduced as the incubation period proceeded to 90 days. These results showed all most similar trends for all the soils under study. In general, added zinc showed significantly higher results to the different fractions of soil Zn both under anaerobic and aerobic incubation with very few exceptions. The highest amount of added Zn (12 kg/ha) always produced greater results than the lower doses. Only exchangeable Zn was found higher in the 1st measurement at 15 DAI then gradually decreased but in other cases, gradual increase in zinc fractions was seen as the incubation study proceed to longer duration provided with very few exceptions. In many cases, the exchangeable-Zn found higher only at 15 DAI but sharply reduced at 30 DAI. In general, the Gray Terrace Soil produced the highest results followed by Non Calcareous Gray Floodplain and the lowest results were observed in Dark Grey Floodplain & Brown Floodplain Soil. DOI: http://dx.doi.org/10.3329/jsf.v9i1-2.14643 J. Sci. Foundation, 9(1&2): 9-15, June-December 2011

scholarly journals Isolation and Molecular Characterization of Acid Producing Bacteria from Selected Oilfield Environments within the Niger Delta

2019 ◽  
pp. 1-9
Author(s):  
W. F. Briggs ◽  
H. O. Stanley ◽  
G. C. Okpokwasili ◽  
O. M. Immanuel ◽  
C. J. Ugboma
Keyword(s):  
Anaerobic Condition ◽  
Niger Delta ◽  
Heterotrophic Bacteria ◽  
Petroleum Industry ◽  
Aerobic Condition ◽  
Oil Field ◽  
Plate Count ◽  
Phenol Red ◽  
Bacterial Dna ◽  
Acid Producing Bacteria

Acid producing bacteria are considered an important group of corrosive bacteria that have economic importance to petroleum industry. In this research, acid producing bacteria were isolated from produced water sample collected at ten (10) oil field environments within the Niger Delta region. The multiple tube fermentation technique was used to isolate the bacteria while Phenol red dextrose broth was used as the microbiological medium for the isolation of the acid producing bacteria. Also total heterotrophic bacteria count (THBC) was determined under aerobic and anaerobic condition using the standard plate count technique and the boiling method used for the extraction of acid producing bacterial DNA after growing in Luria Bertani broth. The extracted bacterial DNA were purified and quantified before PCR amplification. The PCR amplicons were subjected to gel electrophoresis. The bacterial DNA bands were quantified using 1500bp ladder. The result obtained showed that some acid producing bacteria isolated could survive as facultative microorganisms belonging to genera such as Klebsiella, Pantoea, Escherichia, Providentia, Proteus, Shewanella, Myroides and Pseudomonas. There was growth in all samples under aerobic condition with a THBC ranging from 3.602x102Cfu/ml – 4.698x102Cfu/ml while the range was within 3.301x102Cfu/ml – 5.676x102Cfu/ml under anaerobic condition. For physicochemical parameters determined, temperature range for all samples was within 23.9ºC – 24.8ºC; pH was within 7.24 – 8.10; total dissolved solids was within 470 mg/ml – 16160 mg/ml and conductivity was within 1.885 µs/cm – 845.2 µs/cm.  The results also showed that acid producing bacteria grow mostly under aerobic condition unlike the sulphate reducing bacteria.

scholarly journals EFFECTS OF PH SOAKING SOLUTIONS AND HYPOXIA/ANAEROBIC TREAMENT ON GABA ACCUMULATION IN GERMINATED MUNG BEAN (VIGNA RADIATA L.)

2017 ◽  
Vol 55 (2) ◽  
pp. 150 ◽  
Author(s):  
Trung Nhat Truong ◽  
Nguyen Tuong Danh ◽  
Dong Thi Anh Dao
Keyword(s):  
Anaerobic Condition ◽  
Vigna Radiata ◽  
Mung Bean ◽  
Ph Value ◽  
Aerobic Condition ◽  
Culture Conditions ◽  
Anaerobic Conditions ◽  
Gaba Production ◽  
Gaba Content ◽  
Gaba Accumulation

This study investigated the accumulation of γ-aminobutyric acid (GABA) in mung bean sprouts (Vigna Radiata L.) during germination under hypoxia/anaerobic conditions. Raw mung bean seeds were soaked in water at 35oC for 8 hours, dried and germinated under aerobic or hypoxia/anaerobic conditions at 35oC or 40oC for 0, 6, 12, 24, 36 and 48 hours.  Free amino acid and GABA contents were measured during the course of germination. Effect of soaking pH (5.3, 6.3 and 7.3) on GABA content of germinated mung beans under hypoxia/anaerobic condition was also investigated. The other objective of this study was to optimize the culture conditions of GABA production in germinated mung bean. A significant increase (p < 0.05) of GABA content was found in mung bean samples germinated under hypoxia/anaerobic condition. As this result, the combination of soaking pH 6.3 and 12 hour germination at 35oC was found to yield the highest GABA content (1519.07±19.58ppm).  This figure was 1.41 times as high as the content in aerobic condition and 25.32 times as high as the analysis of the raw mung beans. And experimental analysis showed that the optimal condition with aeration treatment for GABA accumulation in germinated mung bean was at a temperature of 36.6oC, time of 14.5 h and a pH value of 5.83; the highest GABA yield was 1638.67ppm, which was 27.77 times higher than raw seeds. In conclusion, germinated mung bean is a good source of GABA and hypoxia/anaerobic condition in combination with soaking pH, germination time and temperature can increase significantly GABA content in germinated mung beans.

scholarly journals Rooting System of Rice Cultivated under System of Rice Intensification (SRI) Method which Improving Rice Yield

2018 ◽  
Vol 25 (2) ◽  
pp. 63
Author(s):  
Nurul Hidayati ◽  
Triadiati Triadiati ◽  
Iswandi Anas
Keyword(s):  
Conventional Method ◽  
Root Respiration ◽  
Rice Yield ◽  
Root Hairs ◽  
Plant Roots ◽  
System Of Rice Intensification ◽  
Aerenchyma Formation ◽  
Rice Plants ◽  
Rice Roots ◽  
Rice Intensification

The development of plant roots is known to play a very important role in the uptake of water and nutrients by rice plants. However, there are few studies on what changes, if any, are induced in the rooting systems of rice plants under System of Rice Intensification (SRI) management. This research evaluated changes of rice roots with SRI method compared to conventional method of irrigated rice cultivation and assessed influences that could improve rice yield. Under SRI management, plant roots were significantly longer and heavier than with conventional method. SRI method also increased the number of root hairs by 60%, and root hairs were healthier and more vigorous compared with conventional method. However, root respiration was not different in the two methods. There was less formation of aerenchyma (air pockets) in rice roots with SRI method, as both the number and size of root aerenchyma were lower with SRI than with conventional method. The SRI method was able to improve the root length, root dry weight compared to the conventional method. The SRI method was also able to increase the number of root hairs by 60% compared with the conventional method. Eh measurements in the soil with SRI method were higher than with conventional method. However, there was no significant different in root respiration. The aerenchyma formation of rice roots in SRI method was lower than conventional method.

scholarly journals Treatment of catfish processing wastewater by the combination of anaerobic and aerobic package cage rotating biological contactors

2017 ◽  
Vol 1 (T1) ◽  
pp. 122-130
Author(s):  
Viet Hoang Le ◽  
Duc Hue Ngo ◽  
Thuan Huu Nguyen ◽  
Ngan Vo Chau Nguyen
Keyword(s):  
Retention Time ◽  
Anaerobic Condition ◽  
Hydraulic Retention Time ◽  
Aerobic Condition ◽  
National Standards ◽  
Treatment Technology ◽  
Second Stage ◽  
Rotating Biological Contactors

The study aimed to diversify the treatment technology of catfish processing wastewater. The experiments were implemented on lab-scale package cage rotating biological contactors with the first stage in anaerobic condition and the second stage in the aerobic condition, using PVC flexible conduit medium. The selected hydraulic retention time of anaerobic stage was 12 hours, and that of aerobic rotating package cage biological contactor was 4 hour 12 minutes. The results showed that almost monitoring parameters (pH, SS, DO, COD, BOD5, TKN, Ptotal) met the national standards of QCVN 11-MT:2015/BTNMT (column A), except +NH4 only reached the QCVN 11-MT:2015/BTNMT (column B). The results confirmed that combining both anaerobic and aerobic package cage rotating biological contactors with PVC flexible conduict medium could apply to treat catfish processing wastewater.

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