THE INITIATION OF THE RHIZOSPHERE MYCOFLORA OF DWARF BEAN PLANTS

1967 ◽  
Vol 13 (5) ◽  
pp. 439-446 ◽  
Author(s):  
A. Thomas ◽  
D. Parkinson
Keyword(s):  
Seed Germination ◽  
Plant Growth ◽  
Rhizosphere Soil ◽  
Trichoderma Viride ◽  
Soil Washing ◽  
Soil Samples ◽  
Early Stages ◽  
Bean Plants ◽  
Humicola Grisea ◽  
Dwarf Bean

An attempt was made, using the soil-washing box technique, to obtain detailed information about the initiation of the rhizosphere mycoflora of dwarf bean seedlings.Tabulated information of the fungi isolated from washed non-rhizosphere soil and washed rhizosphere soil from plants during the first 20 days after seed germination is presented together with data of the fungi isolated from the waters in which these soil samples were washed. These data are discussed in relation to previous observations of fungi isolated from rhizospheres by other methods.The results obtained revealed that in the early days after seed germination the rhizosphere mycoflora was qualitatively similar to that of the non-rhizosphere soil. However, a number of distinct differences were discernible between the rhizosphere and non-rhizosphere populations even at these early stages of plant growth, namely that Cylindrocarpon radicicola, Humicola grisea, and a sterile sclerotial form (W1) were isolated with increased frequency from the rhizosphere, whereas Trichoderma viride was consistently isolated less frequently from the rhizosphere than from non-rhizosphere soil.

A COMPARISON OF METHODS FOR THE ISOLATION OF FUNGI FROM RHIZOSPHERES

1965 ◽  
Vol 11 (6) ◽  
pp. 1001-1007 ◽  
Author(s):  
D. Parkinson ◽  
A. Thomas
Keyword(s):  
Rhizosphere Soil ◽  
Soil Washing ◽  
Accurate Assessment ◽  
Comparison Of Methods ◽  
Fusarium Spp ◽  
Bean Plants ◽  
Isolation Methods ◽  
Soil Dilution ◽  
Dwarf Bean ◽  
Methods Of Isolation

A comparison was made between the fungi isolated from non-rhizosphere soil and from rhizosphere soil of mature dwarf bean plants by three methods of isolation: soil dilution plating, soil plating, and soil washing followed by the plating of washed soil particles. The data obtained with rhizosphere soil demonstrated that the use of the soil-washing technique allowed an increased frequency of isolation of sterile forms, Fusarium spp., and members of the Mucorales, whereas heavily sporing forms were isolated with decreased frequency. It is concluded that, compared with other isolation methods, the soil-washing technique allows a more accurate assessment of fungi active in the rhizosphere.

Quantitative study of fungi in the rhizosphere

1969 ◽  
Vol 15 (8) ◽  
pp. 875-878 ◽  
Author(s):  
D. Parkinson ◽  
A. Thomas
Keyword(s):  
Plant Growth ◽  
Vegetative Growth ◽  
Microbial Growth ◽  
Rhizosphere Soil ◽  
Maximum Activity ◽  
Fungal Mycelium ◽  
Bean Plants ◽  
Agar Film ◽  
Dwarf Bean ◽  
Stimulation Of

Working with dwarf bean plants, the authors studied changes in the lengths of fungal mycelium in rhizosphere and non-rhizosphere soil at different stages of plant growth, using the soil-agar film technique. In general it appears that the stimulation of microbial growth in the rhizosphere was slight in the early stages of plant growth; the length of mycelium in rhizosphere soil increased with increase in vegetative growth of the plants, and decreased markedly at senescence of the plants.Respirometric studies on rhizosphere and non-rhizosphere soil samples indicated greater activity in rhizosphere soil. The degree of stimulation of activity in rhizosphere soil varied according to the stage of plant growth, with maximum activity corresponding to the stage of maximum vegetative growth of the plants.

scholarly journals Isolation and Evaluation of Bacteria Exhibiting Multiple Plant Growth Traits in the Rhizosphere of Yellow Bell Pepper (Capsicum chinense)

2019 ◽  
pp. 1-6
Author(s):  
E. C. Chinakwe ◽  
N. U. Nwogwugwu ◽  
V. I. Ibekwe ◽  
P. O. Chinakwe ◽  
E. O. Egbadon ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Plant Growth ◽  
Rhizosphere Soil ◽  
Growth Traits ◽  
Soil Samples ◽  
Bell Pepper ◽  
Capsicum Chinense ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Plant Growth Promoting Traits

Aim: The study identified and evaluated bacteria exhibiting multiple plant growth traits in the Rhizosphere of Yellow Bell Pepper (Capsicum chinense).                                                              Study Design: Seeds of Capsicum chinense were planted in a soil and allowed to grow. After five eeks of planting, soil samples from the rhizosphere were collected and the bacterial community present in the rhizosphere soil of Capsicum chinense was studied. The isolated organisms were assessed for their ability to produce plant growth promoting traits. Place and Duration of Study: This study was carried out at an agricultural research farmland in the Federal University of Technology, Owerri, Nigeria. Methodology: Seeds of Capiscum chinense were planted in the soil samples in a greenhouse. Rhizosphere soil was collected for analysis to identify the bacterial composition of the rhizosphere soil.                                                                                                                                               Results: In this study the presence of Bacillus cereus, Staphylococcus aureus, Corynebacterium sp, Enterococcus feacalis and Bacillus polymyxa were evident in the rhizosphere samples collected. All isolates showed multiple plant growth promoting traits except Staphylococcus aureushich was positive for hydrogen cyanide production only. Conclusion: The results from this study showed that the bacterial community present in the soil can be used to effect significant vegetative crop yield and agricultural production. The isolated rhizobacteria can be formulated as bio-fertilizers or bioinnoculants, etc.

Screening and antimicrobial activity of actinomycetes isolated from the rhizosphere of Clitoria ternatea

2016 ◽  
Vol 1 (01) ◽  
Author(s):  
Vemavarapu Bhaskara Rao ◽  
Kandlagunta Guru Prasad ◽  
Krishna Naragani ◽  
Vijayalakshmi Muvva
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Calcium Carbonate ◽  
Rhizosphere Soil ◽  
Soil Samples ◽  
Antimicrobial Spectrum ◽  
Clitoria Ternatea ◽  
Primary Screening

The air dried rhizosphere soil samples pretreated with calcium carbonate was employed for the isolation of actinomycete strains. Serial dilution plate technique was used for the isolation of actinomycetes. A total of 20 actinomycete strains designated as BS1-BS20 were isolated from the rhizosphere of medicinal plant Clitoria ternatea. All the 20 strains were subjected to primary screening for antimicrobial activity. Among the 20 strains screened, 10 strains exhibited high antimicrobial spectrum against Staphylococcus aureus, Escherichia coli and Candida albicans.

KEBERADAAN BAKTERI PELARUT FOSFAT DAN AKTIVITAS ENZIM FOSFATASE TANAH DAERAH PERAKARAN TANAMAN OBAT DARI KEBUN RAYA CIBODAS

2018 ◽  
Vol 6 (3) ◽  
Author(s):  
Suliasih Suliasih
Keyword(s):  
Alkaline Phosphatase ◽  
Soil Sample ◽  
Rhizosphere Soil ◽  
Botanical Garden ◽  
Soil Enzyme ◽  
Soil Samples ◽  
Phosphate Solubilizing Bacteria ◽  
Bacillus Sp ◽  
Phosphate Solubilizing ◽  
Serratia Rubidaea

A study was undertaken to investigate to occurance of phosphate solubilizing bacteria from rhizosphere soil samples of medicine plants in Cibodas Botanical Garden. 13 soil samples of medicine plants are collected randomly The result shows that 71 isolates of phosphate solubilizing bacteria were isolated, and 10 species of these organism was identified as Azotobacter sp, Bacillus sp, Chromobacterium sp, C.violaceum, Citrobacter sp. , Enterobacter sp., E. liquefaciens. Nitrosomonas sp., Serratia rubidaea, Sphaerotillus natans. Azotobacter sp. And Bacillus sp. Are found in all of soil tested. Conversely, Serratia rubidaea is only in the sample from rhizosphere of Plantago mayor The activity of acid alkaline phosphatase in soil tested ranged from 0.78 – 60,18 ugp nitrophenole/g/h, with the higest values being recorded in soil sample from rhizosphere of “Lavender”.Keywords : phosphate solubilizing bacteria, soil enzyme phosphatase

scholarly journals Phytase-Producing Rahnella aquatilis JZ-GX1 Promotes Seed Germination and Growth in Corn (Zea mays L.)

2021 ◽  
Vol 9 (8) ◽  
pp. 1647
Author(s):  
Gui-E Li ◽  
Wei-Liang Kong ◽  
Xiao-Qin Wu ◽  
Shi-Bo Ma
Keyword(s):  
Seed Germination ◽  
Plant Growth ◽  
Biomass Accumulation ◽  
Root Surface ◽  
Phosphorus Concentration ◽  
Maize Seedlings ◽  
Total Phosphorus Concentration ◽  
Rahnella Aquatilis ◽  
Maize Seeds

Phytase plays an important role in crop seed germination and plant growth. In order to fully understand the plant growth-promoting mechanism by Rahnella aquatilis JZ-GX1，the effect of this strain on germination of maize seeds was determined in vitro, and the colonization of maize root by R. aquatilis JZ-GX1 was observed by scanning electron microscope. Different inoculum concentrations and Phytate-related soil properties were applied to investigate the effect of R. aquatilis JZ-GX1 on the growth of maize seedlings. The results showed that R. aquatilis JZ-GX1 could effectively secrete indole acetic acid and had significantly promoted seed germination and root length of maize. A large number of R. aquatilis JZ-GX1 cells colonized on the root surface, root hair and the root interior of maize. When the inoculation concentration was 107 cfu/mL and the insoluble organophosphorus compound phytate existed in the soil, the net photosynthetic rate, chlorophyll content, phytase activity secreted by roots, total phosphorus concentration and biomass accumulation of maize seedlings were the highest. In contrast, no significant effect of inoculation was found when the total P content was low or when inorganic P was sufficient in the soil. R. aquatilis JZ-GX1 promotes the growth of maize directly by secreting IAA and indirectly by secreting phytase. This work provides beneficial information for the development and application of R. aquatilis JZ-GX1 as a microbial fertilizer in the future.

scholarly journals Foliar-Applied Potassium Silicate Coupled with Plant Growth-Promoting Rhizobacteria Improves Growth, Physiology, Nutrient Uptake and Productivity of Faba Bean (Vicia faba L.) Irrigated with Saline Water in Salt-Affected Soil

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 894
Author(s):  
Emad M. Hafez ◽  
Hany S. Osman ◽  
Usama A. Abd El-Razek ◽  
Mohssen Elbagory ◽  
Alaa El-Dein Omara ◽  
...  
Keyword(s):  
Plant Growth ◽  
Fresh Water ◽  
Faba Bean ◽  
Saline Water ◽  
Plant Growth Promoting Rhizobacteria ◽  
Control Treatment ◽  
Combined Application ◽  
Bean Plants ◽  
Plant Growth Promoting ◽  
Growth Promoting

The continuity of traditional planting systems in the last few decades has encountered its most significant challenge in the harsh changes in the global climate, leading to frustration in the plant growth and productivity, especially in the arid and semi-arid regions cultivated with moderate or sensitive crops to abiotic stresses. Faba bean, like most legume crops, is considered a moderately sensitive crop to saline soil and/or saline water. In this connection, a field experiment was conducted during the successive winter seasons 2018/2019 and 2019/2020 in a salt-affected soil to explore the combined effects of plant growth-promoting rhizobacteria (PGPR) and potassium (K) silicate on maintaining the soil quality, performance, and productivity of faba bean plants irrigated with either fresh water or saline water. Our findings indicated that the coupled use of PGPR and K silicate under the saline water irrigation treatment had the capability to reduce the levels of exchangeable sodium percentage (ESP) in the soil and to promote the activity of some soil enzymes (urease and dehydrogenase), which recorded nearly non-significant differences compared with fresh water (control) treatment, leading to reinstating the soil quality. Consequently, under salinity stress, the combined application motivated the faba bean vegetative growth, e.g., root length and nodulation, which reinstated the K+/Na+ ions homeostasis, leading to the lessening or equalizing of the activity level of enzymatic antioxidants (CAT, POD, and SOD) compared with the controls of both saline water and fresh water treatments, respectively. Although the irrigation with saline water significantly increased the osmolytes concentration (free amino acids and proline) in faba bean plants compared with fresh water treatment, application of PGPR or K-silicate notably reduced the osmolyte levels below the control treatment, either under stress or non-stress conditions. On the contrary, the concentrations of soluble assimilates (total soluble proteins and total soluble sugars) recorded pronounced increases under tested treatments, which enriched the plant growth, the nutrients (N, P, and K) uptake and translocation to the sink organs, which lastly improved the yield attributes (number of pods plant−1, number of seeds pod−1, 100-seed weight). It was concluded that the combined application of PGPR and K-silicate is considered a profitable strategy that is able to alleviate the harmful impact of salt stress alongside increasing plant growth and productivity.

scholarly journals Trace elements in aerial parts and rhizosphere of Thymus pannonicus All.

2011 ◽  
Vol 6 (4) ◽  
pp. 616-623 ◽  
Author(s):  
Jelena Arsenijević ◽  
Slavica Ražić ◽  
Zoran Maksimović ◽  
Svetlana Đogo
Keyword(s):  
Trace Elements ◽  
Soil Acidity ◽  
Rhizosphere Soil ◽  
Absorption Spectrometry ◽  
Soil Samples ◽  
Acid Digestion ◽  
Aerial Parts ◽  
Physiological Properties ◽  
Flameless Atomic Absorption Spectrometry ◽  
Zinc Levels

AbstractThis paper brings out the results of the study on the levels of selected trace elements (Cu, Fe, Mn, Zn and Cr) in aerial parts of Thymus pannonicus All. (Lamiaceae) and rhizosphere soil from twelve locations in Serbia. Prior to assays by flame and flameless atomic absorption spectrometry, samples were subjected to microwave-assisted acid digestion. Real and potential acidity of soil samples were also measured. Obtained results for soil samples, although slightly higher for some elements (Cu: 12.38–45.18 mg/kg; Fe: 22102–46193 mg/kg; Mn: 776.95–4901.27 mg/kg; Zn: 62.27–214.02 mg/kg; Cr: 48.86–69.13 mg/kg), were found to fit into biogeochemical background. Element contents in plant samples differed depending on collecting site (Cu: 5.26–14.07 mg/kg; Fe: 25.92–1454.07 mg/kg; Mn: 89.29–278.25 mg/kg; Zn: 1.81–10.64 mg/kg; Cr: 1.11–3.51 mg/kg), which can be partly explainable by different nutrient availability influenced by soil acidity. Zinc levels in T. pannonicus were below expected and seem to be strongly influenced by plant physiological properties.

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