scholarly journals Responses of Phosphate-Solubilizing Microorganisms Mediated Phosphorus Cycling to Drought-Flood Abrupt Alternation in Summer Maize Field Soil

2022 ◽  
Vol 12 ◽  
Author(s):  
Wuxia Bi ◽  
Baisha Weng ◽  
Denghua Yan ◽  
Hao Wang ◽  
Mengke Wang ◽  
...  
Keyword(s):  
Driving Forces ◽  
Soil Microbial Communities ◽  
Mature Stage ◽  
Phosphate Solubilizing Bacteria ◽  
Field Soil ◽  
Summer Maize ◽  
Maize Field ◽  
P Cycling ◽  
Plant P Uptake ◽  
Phosphate Solubilizing

Soil microbial communities are essential to phosphorus (P) cycling, especially in the process of insoluble phosphorus solubilization for plant P uptake. Phosphate-solubilizing microorganisms (PSM) are the dominant driving forces. The PSM mediated soil P cycling is easily affected by water condition changes due to extreme hydrological events. Previous studies basically focused on the effects of droughts, floods, or drying-rewetting on P cycling, while few focused on drought-flood abrupt alternation (DFAA), especially through microbial activities. This study explored the DFAA effects on P cycling mediated by PSM and P metabolism-related genes in summer maize field soil. Field control experiments were conducted to simulate two levels of DFAA (light drought-moderate flood, moderate drought-moderate flood) during two summer maize growing periods (seeding-jointing stage, tasseling-grain filling stage). Results showed that the relative abundance of phosphate-solubilizing bacteria (PSB) and phosphate-solubilizing fungi (PSF) increased after DFAA compared to the control system (CS), and PSF has lower resistance but higher resilience to DFAA than PSB. Significant differences can be found on the genera Pseudomonas, Arthrobacter, and Penicillium, and the P metabolism-related gene K21195 under DFAA. The DFAA also led to unstable and dispersed structure of the farmland ecosystem network related to P cycling, with persistent influences until the mature stage of summer maize. This study provides references for understanding the micro process on P cycling under DFAA in topsoil, which could further guide the DFAA regulations.

The Presence of Beneficial Organisms Associated to N and P Economy in the Rhizosphere of Native Vegetation in an Oligotrophic Savanna of Guárico State, Venezuela

2017 ◽  
Vol 10 (1) ◽  
pp. 123-133
Author(s):  
Edith Mora ◽  
Marcia Toro ◽  
Danilo López-Hernández
Keyword(s):  
Soil Microorganisms ◽  
P Uptake ◽  
Ecological Niches ◽  
Phosphate Solubilizing Bacteria ◽  
Natural Conditions ◽  
Tropical Plants ◽  
Plant P Uptake ◽  
Am Symbiosis ◽  
Phosphate Solubilizing ◽  
Total Bacteria

Background:In natural conditions, tropical plants are adapted to different ecological niches that can be associated to soil microorganisms which play a key role in nutrient cycling likeArbuscular mycorrhiza(AM), phosphate solubilizing bacteria (PSB) and/or nitrogen fixing rhizobia.Methods:We report a survey of the presence in a Trachypogon savanna located at Estación Experimental La Iguana (EELI) in Central Venezuela, of some beneficial plant-microorganism associations. In this savanna, plants present a high AM symbiosis affinity. The high mycorrhization and the presence of potential PSB suggest a synergic effect in plant P-uptake.Results:After screening the rhizospheres of 25 plant species from the zone, we could isolate a high proportion of potential PSB in relation to the total bacteria number from the rhizospheres ofCentrosema venosumandGalactia jussiaeana.Conclusion:Therefore, the presence of potential PSB in the rhizosphere of those species constitutes an important finding to discover novel biofertilizers for crop plants.

scholarly journals Phosphate-Solubilizing Bacterium Acinetobacter pittii gp-1 Affects Rhizosphere Bacterial Community to Alleviate Soil Phosphorus Limitation for Growth of Soybean (Glycine max)

2021 ◽  
Vol 12 ◽  
Author(s):  
Donglan He ◽  
Wenjie Wan
Keyword(s):  
Bacterial Community ◽  
Crop Production ◽  
P Availability ◽  
Phosphate Solubilizing Bacteria ◽  
Organic P ◽  
P Cycling ◽  
Acinetobacter Pittii ◽  
Rhizosphere Bacterial Community ◽  
Phosphate Solubilizing ◽  
Inorganic And Organic

Phosphorus (P) availability is a major restriction to crop production, and phosphate-solubilizing bacteria (PSBs) in soils are responsible for P turnover. However, it remains unknown whether the application of PSB can facilitate both inorganic and organic P transformation and enhance function of plant rhizosphere bacteria. In this study, we applied Illumina MiSeq sequencing, plate-colony counting, quantitative PCR, and multiple ecological analyses. We found that the inoculation of PSB Acinetobacter pittii gp-1 significantly promoted the growth of soybean represented by better vegetation properties (e.g., plant height and root P) and increased activities of phosphatase (4.20–9.72 μg/g/h) and phytase (0.69–1.53 μmol/g/day) as well as content of indole acetic acid (5.80–40.35 μg/g/h). Additionally, the application of strain A. pittii gp-1 significantly increased abundances of both inorganic and organic P-cycling-related genes (i.e., phoD, bpp, gcd, and pstS). More importantly, the application of A. pittii gp-1 could increase the function represented by P-cycling-related enzymes (e.g., phosphotransferase) of rhizosphere bacterial community based on functional profiling. To our knowledge, this is the first report that the application of PSB A. pittii promotes inorganic and organic P utilization and increases the function of rhizosphere bacterial community. Therefore, the PSB A. pittii gp-1 could be a good candidate for the promotion of soybean growth.

scholarly journals Influence of an Arbuscular Mycorrhizal Fungus and Phosphate-Solubilizing Bacterium Inoculation at Stem Cutting Stage on P Uptake and Growth of Impatiens walleriana Plants in an Unsterile Field Soil

2019 ◽  
Vol 27 (2) ◽  
pp. 11-22
Author(s):  
Muthukumar Thangavelu ◽  
Prabhu Arumugam
Keyword(s):  
Growth Parameters ◽  
Arbuscular Mycorrhizal ◽  
Am Fungi ◽  
P Uptake ◽  
Phosphate Solubilizing Bacteria ◽  
Stem Cuttings ◽  
Field Soil ◽  
Dual Inoculation ◽  
Impatiens Walleriana ◽  
Phosphate Solubilizing

AbstractMicroorganisms play an important role in the propagation and growth of plants. Propagation of plants through stem cuttings is a popular method widely practiced in horticulture and forestry. As the information on the interactive role of arbuscular mycorrhizal (AM) fungi and phosphate-solubilizing bacteria (PSB) in the regeneration and growth of clonally propagated plants is limited, we inoculated stem cuttings of Impatiens walleriana with Rhizophagus fasciculatus and Bacillus megaterium var. phosphaticum individually or in combination in an unsterile Alfisol field soil. The inoculated cuttings were harvested after 45 days of cultivation and various growth parameters and phosphorus (P) uptake were measured. Inoculation with the AM fungus or PSB individually improved plant growth parameters, whereas the dual inoculation did not give synergistic results. Plants inoculated at cutting stage with R. fasciculatus accumulated the highest plant biomass and showed maximum microbial inoculation effect and efficiency of P uptake. Inoculation with the PSB stimulated symbiosis with native AM fungi but a synergistic effect has not been found when both AM fungi and PSB were co-inoculated. It could be concluded that screening for compatibility between microorganisms is essential before selecting the bioinoculants for dual inoculation.

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

Performance of Phosphate Solubilizing Bacteria in Tea (Camellia sinensis L.) Rhizosphere

2021 ◽  
Author(s):  
Parimal Panda ◽  
Prasenjit Ray ◽  
Bisweswar Mahato ◽  
Bappa Paramanik ◽  
Ashok Choudhury ◽  
...  
Keyword(s):  
Camellia Sinensis ◽  
Phosphate Solubilizing Bacteria ◽  
Phosphate Solubilizing

scholarly journals Phosphate solubilizing bacteria isolated from Tuban mangrove soil, Indonesia

2021 ◽  
Vol 762 (1) ◽  
pp. 012007
Author(s):  
Fatimah ◽  
I N Annizah ◽  
D D Alawiyah ◽  
R D Susetyo ◽  
T Surtiningsih ◽  
...  
Keyword(s):  
Phosphate Solubilizing Bacteria ◽  
Mangrove Soil ◽  
Phosphate Solubilizing
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