Solubilization of inorganic phosphates and growth emergence of wheat as affected by Azotobacter chroococcum mutants

Kumar, Vivek; Narula, Neeru

doi:10.1007/s003740050497

Cited by 172 publications

(70 citation statements)

References 8 publications

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“…Both A. chroococcum and P. agglomerans were found to increase plant growth, plant dry matter, as well as N and P uptake [25,113]. Azospirillum-inoculated plants under drought conditions had increased Mg, K and Ca contents compared to non-inoculated plants [62,[114][115][116][117]. The increase in nutrient accumulation/uptake due to biofertilizers/ PGPR was previously reported in wheat [118][119][120].…”

Section: Pgpr and Plant Nutrient Uptakementioning

confidence: 81%

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The Role of Soil Beneficial Bacteria in Wheat Production: A Review

Çakmakçı¹,

Turan²,

Kıtır³

et al. 2017

Wheat Improvement, Management and Utilization

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Free-living plant growth-promoting rhizobacteria (PGPR) have favourable effect on plant growth, tolerance against stresses and are considered as a promising alternative to inorganic fertilizer for promoting plant growth, yield and quality. PGPR colonize at the plant root, increase germination rates, promote root growth, yield, leaf area, chlorophyll content, nitrogen content, protein content, tolerance to drought, shoot and root weight, and delayed leaf senescence. Several important bacterial characteristics, such as biological nitrogen fixation, solubilization of inorganic phosphate and mineralization of organic phosphate, nutrient uptake, 1-aminocydopropane-1-carboxylic acid (ACC) deaminase activity and production of siderophores and phytohormones, can be assessed as plant growth promotion traits. By efficient use, PGPR is expected to contribute to agronomic efficiency, chiefly by decreasing costs and environmental pollution, by eliminating harmful chemicals. This review discusses various bacteria acting as PGPR, their genetic diversity, screening strategies, working principles, applications for wheat and future aspects in terms of efficiency, mechanisms and the desirable properties. The elucidation of the diverse mechanisms will enable microorganisms developing agriculture further.

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Section: Pgpr and Plant Nutrient Uptakementioning

confidence: 81%

“…Wheat (Triticum aestivum L.) [142] Salinity Azospirillum sp Durum wheat (Triticum durum) [128] [207] Azorhizobium caulinodans Wheat N2 fixation Dry weight, nitrogen content [192] Azotobacter chroococcum Wheat Rhizospheric P solubilization, N2 fixation, IAA Seed emergence radicle and plumule length [114] Azotobacter sp.…”

Section: Pseudomonas Putida 108mentioning

confidence: 99%

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

Çakmakçı¹,

Turan²,

Kıtır³

et al. 2017

Wheat Improvement, Management and Utilization

View full text Add to dashboard Cite

show abstract

“…It has been reported that production of organic acids by PGPR contributes the conversion of insoluble form of P to soluble (H2 PO 4 , HPO 2 4 ) forms (Sundara et al, 2002;Richardson et al, 2009). PGPRs which enhance P solubilization have been isolated and their functions were studied in range of crops such as wheat, tomato and radish (Kim et al, 1998;Antoun et al, 1998;Singh and Kapoor, 1999;Kumar and Narula, 1999). In the case of other crops such as sugar cane, increase in brix has been reported as an indirect function of PGPR to control pathogen attack (Senthil et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

PGPR Improves Yield of Strawberry Species under Less-Fertilized Conditions

Kurokura

Hiraide

Shimamura

et al. 2017

Environmental Control in Biology

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Plant growth promoting rhizobacteria (PGPR) is applied as biofertilizer to expect better production potential on commercial crops while keeping sustainability, but their function is dependent on the combination of PGPR and target crops. It has been reported that the application of PGPR in the soil resulted in the increment of strawberry yield, but other reports argue that PGPR has no effect on the yield potential. In addition, it is not clear whether the application timing of PGPR affects in a forcing cultivation system which usually requires transplanting. In this study, responses of diploid wild strawberry (Fragaria vesca) and garden strawberry (F. ananassa Duch.) varieties to PGPR application were examined. Application of PGPR, Bacillus cereus KI-2, during the flower induction increased the total yield and number of fruits in F. vesca 'Hawaii-4', and in garden strawberry 'Hoko-wase'. The application resulted in earlier flowering in 'Hoko-wase' while no difference was observed in 'Tochi-otome'. Sucrose content was also altered in cultivar dependent manner so that it was increased in 'Hawaii-4', while it was decreased in 'Tochi-otome'. These results indicate that PGPR has a potential to improve the yield factors while keeping the quality of the fruits, but the effect is cultivar dependent.

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“…Cada isolado foi inoculado e reinoculado na superfície do meio GEL, e ambas as inoculações incubadas por sete dias a 30 o C. Posteriormente, foi determinado o índice de solubilização (IS) de fosfato de cálcio, obtido pela razão entre o diâmetro do halo e o diâ-metro da colônia, conforme descrito por Kumar & Narula (1999), sendo a capacidade de solubilização de fosfato classificada em baixa (IS < 2), média (2 < IS < 3) e alta (IS > 3), de acordo com Silva Filho & Vidor (2000).…”

Section: Methodsunclassified

Ação de herbicidas na atividade de bactérias solubilizadoras de fosfato da rizosfera de cana-de-açúcar

et al. 2009

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RESUMO -Objetivou-se com este trabalho avaliar a ação de herbicidas na atividade e no crescimento de isolados bacterianos solubilizadores de fosfato, provenientes da rizosfera de plantas de cana-de-açúcar. Dois isolados bacterianos, Sac 4 e Sac 13, classificados como de alta e de baixa capacidade de solubilização de fosfato inorgânico, respectivamente, foram usados no experimento. O crescimento e a atividade dos isolados solubilizadores foram avaliados na presença dos herbicidas trifloxysulfuron-sodium, ametryn e trifloxysulfuronsodium + ametryn, nas doses de 0, ½, ¾, 1 e 2 vezes a dose de referência (0,45, 60 e 0,74 + 30 mg L -1 , respectivamente). O isolado Sac 4 teve seu crescimento reduzido na presença dos herbicidas ametryn e trifloxysulfuron-sodium + ametryn, sendo a maior redução na presença da mistura (92,43%). Não se observaram efeitos dos herbicidas no crescimento do isolado bacteriano Sac 13. A atividade solubilizadora de fosfato inorgânico de ambos os isolados não foi alterada na presença dos herbicidas, indicando que esses compostos apresentam seletividade a algumas populações de microrganismos do solo.Palavras-chave: trifloxysulfuron-sodium, ametryn, microrganismos do solo.ABSTRACT -The objective of this work was to evaluate the effects of herbicides on the phosphate-solubilizing activity and growth of bacteria isolated from sugarcane rhizosphere. Two bacterial isolates, Sac 4 and Sac 13, classified as being of high and low capability of solubilizing inorganic phosphate, respectively, were used in the experiments. The growth and phosphatesolubilizing activities were evaluated in the presence of trifloxysulfuron-sodium, ametryn, and trifloxysulfuron-sodium + ametryn, at 0, ½, ¾, 1, and 2 times the reference dose (0.45, 60, 0.74 + 30 mg L -1 , respectively). For Sac 4, the herbicides ametryn and trifloxysulfuron-sodium + ametryn reduced growth, with the largest reduction being observed for trifloxysulfuron-sodium + ametryn, while for Sac 13, no effect of the herbicides was observed. The phosphate-solubilizing activity of both bacterial isolates was not affected by the herbicides tested; this indicates that the impact of these compounds on the soil microorganisms is selective to certain populations.

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Solubilization of inorganic phosphates and growth emergence of wheat as affected by Azotobacter chroococcum mutants

Cited by 172 publications

References 8 publications

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

PGPR Improves Yield of Strawberry Species under Less-Fertilized Conditions

Ação de herbicidas na atividade de bactérias solubilizadoras de fosfato da rizosfera de cana-de-açúcar

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