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Journal of Integrative Agriculture 2015年第8期14卷 1588-1597页

作者： ZHAO Lei ZHANG Ya-qing College of Life Science Shandong Normal University

Salinity is one of the major abiotic stresses limiting crop growth and *** study investigated the underlying mechanisms of Trichoderma asperellum Q1 in promoting cucumber growth under salt stress, including the abilities of the strain to solubilize phosphate and to produce *** results showed that *** Q1 could solubilize inorganic or organic phosphate and the activities of phosphatases and phytase could be detected in the culture *** hydroponic experiments, the growth of cucumber seedlings was increased in the hydroponic system treated by culture filtrate of strain Q1 with tricalcium phosphate or calcium phytate under salt *** strain also exhibited the ability to produce indole acetic acid（IAA）, gibberellic acid（GA） and abscisic acid（ABA） in liquid medium without any *** levels of those three phytohormones in cucumber seedling leaves also increased after inoculated with this strain, along with increased root growth and root activities of the *** results demonstrated the mechanisms of *** Q1 in alleviating the suppression effect of salt stress involving the change of phytohormone levels in cucumber plant and its ability of phosphate solubilization.

关键词： Trichoderma asperellum Q1 cucumber seedlings phosphate solubilization phytohormone salt stress

phosphate solubilization potential of native rhizospheric microflora and their impact on growth of Madhuca latifolia(Mahua):An oil yielding medicinal plant of India

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Studies in Fungi 2018年第1期3卷 59-72页

作者： Mishra S Pany S Gupta N Plant Pathology and Microbiology Division Regional Plant Resource Centre BhubaneswarOdisha 751015 India

Madhuca latifolia is an economically important medicinal and oil yielding plant of India having slow growth *** microbial application to the rhizosphere of host plant are beneficial for growth and development of plants,a comprehensive experimental study by using native microflora of Madhuca latifolia had been carried out in the nursery *** and identification of native rhizospheric soil revealed the occurrence of 17 different types of bacteria(gram negative and positive)and 30 numbers of fungi belonging to myceloid type,Aspergillus,Alternaria,Colletotrichum,Fusarium and *** study was confined to phosphate solubilizing microbes for which solubilization potential(solubilization index and solubilization efficiency)was *** experiments in pot culture with red laterite soil were set in two experimental categories(1)non-transplanted and(2)*** grown under both the conditions with and without microbial application were maintained up to 120 days and final data recorded for morphological,physiological growth and as soil *** mineral solubilizing potential of native microbial strains has been *** inoculants were more effective than the bacterial inoculants as far as the growth and development of plants *** all,bacteria MLB-1,MLB-6,Aspergillus terreus and non-sporulating dematiaceous form of fungi were prominent in improving plant *** has also been confirmed the useful and beneficial impact of indigenous *** records made during the study is useful for development of bioinoculants for forest trees,nursery of quality planting material which will also helps in establishment at plantation site.

关键词： Bacteria bioinoculants forest trees fungi Madhuca latifolia phosphate solubilization

Effect of Lanthanum on solubilization of Rock phosphate in Liquid Culture by Aspergillus Niger and Penicillium Oxalicum

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Journal of Rare Earths 2004年第S1期22卷 177-180页

作者：王光华周德瑞杨谦金剑赵英 Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Northeast (Institute) of Geography and Agricultural Ecology Chinese Academy Sciences Harbin 150040 China Technology Extension Center of Heilongjiang Province Harbin 150001 China

Rock phosphate (RP) is a low efficient P fertilizer when directly used in the soil. phosphate-solubilizing microorganisms (PSMs) can solubilize RP in fermentation or soil condition. The effect of different concentration of lanthanum (La) on the solubilization of RP was investigated by two isolates of phosphate-solubilizing fungi (PSF) Aspergillus niger P39 and Penicillium oxalicum P66 in liquid culture. Experimental results show that relatively higher concentration of La in the culture solution inhibites fungal growth and delays RP solubilizing activity of two isolates. This inhibitory effect of La on RP solubilization varies with PSF (isolate P66 is more sensitive to La than P39 in this experiment). Comparing the pH value of culture media with soluble P content as affected by La application, only within individual isolate not different isolates the negatively significant relationship was observed.

关键词： lanthanum rock phosphate phosphate-solubilizing microorganisms phosphate solubilization

Co-inoculation of indigenous Pseudomonas oryzihabitans and Bradyrhizobium *** the growth,symbiotic efficacy,nutrient acquisition,and grain yield of soybean

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Pedosphere 2022年第3期32卷 438-451页

作者： Kailash Chand KUMAWAT Inderjeet SINGH Sharon NAGPAL Poonam SHARMA Rajeev Kumar GUPTA Asmita SIRARI Department of Microbiology Punjab Agricultural UniversityLudhiana 141004(India) Department of Plant Breeding and Genetics Punjab Agricultural UniversityLudhiana 141004(India) Department of Soil Science Punjab Agricultural UniversityLudhiana 141004(India)

Soil microbes play a vital role in improving plant growth,crop productivity,and soil health through solubilization of essential *** investigation was conducted to access the efficacy of Bradyrhizobium ***-3 and the indigenous phosphate-solubilizing Pseudomonas oryzihabitans LSE-3 in improving the symbiosis,nutrient accumulation,and yield of *** isolate LSE-3,selected on the basis of phosphate solubilization,was screened for beneficial traits,antagonistic activities,and *** levels of indole acetic acid production(50.34±2.35μg mL^(-1)),phosphate solubilization(184.4±7.4 mg L^(-1)),biofilm formation(optical density at 560 mm,1.3896±0.04),siderophore production(121.46±1.61μg mL^(-1)),and 1-aminocyclopropane-1-carboxylate deaminase activity(0.51±0.07 mmolα-ketobutyrateμg^(-1) protein h^(-1))were significantly higher with the dual inoculants(LSBR-3 and LSE-3)than with the single inoculant *** plant growth-promoting traits of single and dual inoculants were evaluated for the synergistic effects on soybean under field *** plots treated with LSBR-3+LSE-3 exhibited improvement in seed germination,plant height,plant biomass,and chlorophyll content compared with the uninoculated *** inoculant treatments resulted in significantly higher symbiotic efficacy evidenced by increased nodulation(40.0±0.75 plant^(-1)),nodule biomass(188.52±6.29 mg plant^(-1)),and leghemoglobin content(11.02±0.83 mg g^(-1) fresh nodule),and significantly increased activities of phosphatase(75.16±3.17 and 58.77±6.08μg p-nitrophenol g^(-1) h^(-1) for alkaline and acid phosphatase,respectively)and dehydrogenase(32.66±1.92μg triphenylformazan g^(-1) h^(-1))compared with the *** inoculation with LSBR-3 and LSE-3 enhanced the uptake of macro-and micronutrients,reduced Na content in shoots,and resulted in 10.85%higher grain yield and ***$96.80 ha^(-1) higher profit compared with the *** is the first report on the effectiv

关键词： bacteria biofilm formation phosphate solubilization plant growth-promoting trait sustainable agriculture zinc solubilization

Role of beneficial microbial gene pool in mitigating salt/nutrient stress of plants in saline soils through underground phytostimulating signalling molecules

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Pedosphere 2023年第1期33卷 153-171页

作者： Shalini TIWARI Barkha SHARMA Neha BISHT Lakshmi TEWARI Department of Microbiology College of Basic Science&HumanitiesG.B.Pant University of Agriculture&TechnologyPantnagarUttarakhand 263145India

Soil salinity diminishes soil health and reduces crop yield,which is becoming a major global *** stress is one of the primary stresses,leading to several other secondary stresses that restrict plant growth and soil *** major secondary stresses induced in plants under saline-alkaline conditions include osmotic stress,nutrient limitation,and ionic stress,all of which negatively impact overall plant *** stressed conditions,certain beneficial soil microflora are known to have evolved phytostimulating mechanisms,such as the synthesis of osmoprotectants,siderophores,1-aminocyclopropane-1-carboxylic acid(ACC)deaminase activity,phosphate solubilization,and hormone production,which enhance plant growth and development while mitigating nutrient *** soil-borne bacterial species such as Bacillus,Pseudomonas,and Klebsiella and fungal strains such as Trichoderma,Aspergillus,Penicillium,Alternaria,and Fusarium also aid in reducing salinity ***-solubilizing microorganisms also assist in nutrient acquisition via both enzymatic and non-enzymatic *** the case of enzymatic processes,they produce different enzymes such as alkaline phosphatases and phytases,whereas non-enzymatic processes produce organic acids such as gluconic,citric,malic,and oxalic *** native halotolerant/halophilic soil microbial gene pool with multifunctional traits and stress-induced gene expression can be developed as suitable bio-inoculants to enhance stress tolerance and optimize plant growth in saline soils.

关键词： abiotic stress crop improvement gene expression halotolerant microbial diversity phosphate solubilization plant growth promoting traits soil health

Soil organic carbon and phosphorus availability regulate abundance of culturable phosphate-solubilizing bacteria in paddy fields

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Pedosphere 2020年第3期30卷 405-413页

作者： Arvind KUMAR Lal Chand RAI Molecular Biology Section Laboratory of Algal BiologyCenter of Advanced Study in BotanyBanaras Hindu UniversityVaranasi 221005India Department of Biotechnology Guru Ghasidas VishwavidyalayaBilaspur 495009India

Low availability of phosphorus(P) is a major constraint for optimal crop production, as P is mostly present in its insoluble form in soil. Therefore,phosphate-solubilizing bacteria(PSB) from paddy field soils of the Indo-Gangetic Plain, India were isolated, and their abundance was attempted to be correlated with the physicochemical characteristics of the soils. Ninety-four PSB were isolated on Pikovskaya’s agar medium, and quantitative phosphate solubilization was evaluated using NBRIP medium. The isolates solubilized P up to a concentration of 1 006 μg mL-1 from tricalcium phosphate with the secretion of organic acids. These isolates were identified by 16 S rRNA gene sequence comparison, and they belonged to Gammaproteobacteria(56 isolates),Firmicutes(28 isolates), Actinobacteria(8 isolates), and Alphaproteobacteria(2 isolates). Phylogenetic analysis confirmed the identification by clustering the isolates in the clade of the respective reference organisms. The correlation analysis between PSB abundance and physicochemical characteristics revealed that the PSB population increased with increasing levels of soil organic carbon, insoluble P, K+, and Mg2+. The promising PSB explored in this study can be further evaluated for their biofertilizer potential in the field and for their use as potent bio-inoculants.

关键词： bacterial abundance insoluble P organic acids phosphate solubilization phylogenetic analysis 16S rRNA gene

Rhizoplane microbiota of superior wheat varieties possess enhanced plant growth-promoting abilities

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Frontiers in Biology 2016年第6期11卷 481-487页

作者： Ayesha Siddiqa Yasir Rehman Shahida Hasnain Department of Microbiology and Molecular Genetics University of the Punjab Lahore Pakistan The Women University Multan Multan Pakistan

BACKGROUND： Microbes affect the growth of plants. In this study, the diversity and plant growth-supporting activities of wheat rhizospheric bacteria were examined. METHODS： Sampling was performed thrice at different phases of plant growth. Microbes associated with the rhizoplane of three wheat varieties （Seher, Lasani, and Faisalabad） were cultured and assessed for their plant growth-promoting abilities based on auxin production, hydrogen cyanide production, phosphate solubilization, and nitrogen fixation. RESULTS： Bacterial load （CFU/mL） declined, and the succession of bacterial diversity occurred as the plants aged. Most auxin-producing bacteria and the highest concentrations of auxin （77 ~tg/mL） were observed during the second sampling point at the filleting stage. The Seher variety harbored the most auxin-producing as well as phosphate-solubilizing bacteria. Most of the bacteria belonged to Bacillus and Pseudomonas. Planomicrobium, Serratia, Rhizobium, Brevundimonas, Stenotropho- monas, and Exiguobacterium sp. were also found. CONCLUSIONS： These results suggest that the rhizoplane microbiota associated with higher-yield plant varieties have better plant growth-promoting abilities as compared to the microbiota associated with lower-yield plant varieties.

关键词： wheat microbiota rhizoplane auxin phosphate solubilization

Growth promoting effect of microbial inoculants on Acacia nilotica grown under nursery conditions

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Studies in Fungi 2021年第1期6卷 400-407页

作者： Dash S Gupta N Plant Pathology and Microbiology Division Regional Plant Resource CentreBhubaneswar-751015 OdishaIndia

Present study was carried out on Acacia nilotica seedlings grown under different bioinoculation treatments by using laboratory grown liquid cultures of 10 fungal isolates,11 Rhizobium isolates and 5 other bacterial *** cultures were screened for their effects on growth of Acacia nilotica grown in greenhouse *** selected microbial inoculants were assessed as considering their individual performance or in combination with the other inoculants in specific *** higher performance was shown with the combination of Penicillum chrysogenum Thom.1,B 5 bacterial isolate,R10 and/or R11 isolates of ***,it was observed that the above microbial mixed culture inoculation was promoted plant growth specifically number of leaves and the leaf ***,nursery application of mixed microbial inoculants,specifically as above could be beneficial for the production of quality planting material(QPM)of Acacia nilotica and subsequent field applications.

关键词： Acacia nilotica Aspergillus Growth Penicillium phosphate solubilization Rhizobium