Plant Growth Promoting Potential of  Rhizobium Isolates  and Soil Health

Baba, Zahoor Ahmad; Asif, Muhammad; Shafeeq, Tahir; Sheikh, Fayaz Ahmad; Bhat, Zahoor Ahmad; Khan, Sana Ullah; Saher, Tabinda; Hamid, Basharat

doi:10.9755/ejfa.2015.04.043

Cited by 9 publications

(3 citation statements)

References 15 publications

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“…The maximum amount GA production of 14.51 g/25ml of broth was observed in the reference strain which was on par with the isolates AMVPR98 (14.43 g/25ml broth). The results of this study are in agreement with the findings of Baba et al, (2015) who reported that Rhizobium phaseoli isolated from organic farm and Kupwara district were found to produce 162 µl and 153 µl of GA respectively.…”

Section: Ga Productionsupporting

confidence: 93%

Characterization of Plant Growth Promoting Rhizobial Isolates for Pigeon Pea (Cajanus cajan [L.] Millsp)

Harshitha¹,

Goudar²,

Krishnaraj³

et al. 2020

Int.J.Curr.Microbiol.App.Sci

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Study was conducted to isolate and characterize Rhizobia from root nodules of pigeon pea from Vijayapur, Kalaburgi and Bagalkot districts of northern regions of Karnataka. Ten Rhizobial isolates and reference strain PPM35B were subjected for nodulation test. All the isolates showed positive result for nodulation. The number of nodules was ranging from 12 to 14.5 per plant. All these isolates were also subjected for functional characterization. The amount of IAA, GA production and ACC deaminase activity by different rhizobial isolates ranged from 16.60 to 22.85 g IAA/ ml of broth, 11.00 to 14.43 g/25ml of broth and 44.5 to 73.5 nmoles of α-ketobutyrate/mg/h of broth respectively. The diameter of P, Zn and Si solubilization by the rhizobial isolates was ranged from 4.5 to 10.3 mm, 9.5 to 20.5 mm and 5.5 to 6.5 mm, respectively. These isolates were further subjected for morphological and biochemical characterization. All the isolates were found to be rod shaped and gram negative. All the isolates were positive for citrate utilization, catalase, urease, oxidase, acid and gas production tests whereas negative for Voges proskauer's and indole production test.

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Section: Ga Productionsupporting

confidence: 93%

Characterization of Plant Growth Promoting Rhizobial Isolates for Pigeon Pea (Cajanus cajan [L.] Millsp)

Harshitha¹,

Goudar²,

Krishnaraj³

et al. 2020

Int.J.Curr.Microbiol.App.Sci

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“…The mean value of organic carbon was 1.57% for upper belts and 1.96 % for lower belts. Similar results were reported by Baba et al [18] and Ahad et al [19] + ) kg -1 in lower belts. The higher value of CEC in lower belts may be due to the higher amount of organic matter present in lower belts as it is well-established fact that presence of organic matter in soil has a positive impact on its CEC [20].…”

Section: Physico Chemical Propertiessupporting

confidence: 91%

Potassium Forms in Brown Sarson Growing Soils in District Kupwara, Kashmir

Chesti¹,

Mir²,

Khan³

et al. 2022

JEAI

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Distribution of different forms of potassium and their correlation with soil physico-chemical properties was studied in Brown Sarson growing soils of district Kupwara. The study was carried out to pave a way for drafting proper fertilization plan keeping in view the importance of potassium for crops and reluctance of farmers in applying the same. The study area was divided into two regions i: e upper belt and lower belt and surface soil samples (0-25 cm), ten from each belt were collected for analysis. The soil samples collected were studied for potassium forms and physico- chemical properties. The soils analyzed were clay loam to loamy in texture and acidic to neutral in reaction. The organic carbon content was higher in lower belts as compared to upper belts. The potassium fractions followed an order total-K > lattice-K > acid soluble-K > non exchangeable- K> available-K> exchangeable-K> water soluble-K. All forms of K were positively correlated to organic carbon, cation exchange capacity and clay content and negatively correlated with pH and calcium carbonate.

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“…etc., were found to be involved in the biosynthesis of IAA through the formation of indole-3-pyruvic acid and indole-3-acetic aldehyde [59][60][61][62][63]. Growth improvement through enzyme activity such as proteases, chitinases, cellulases, phosphatases, etc., is another mechanism used by plant growth-promoting (PGP) bacteria via attacking pathogens through the excretion of cell wall degenerating enzymes [56,[64][65][66][67]. KSB (Grz) isolate was noteworthy as it showed outstanding performance regarding the solubilization of insoluble K, and can be utilized as a K biofertilizer in colder regions.…”

Section: Production Of Plant Growth-promoting Substancesmentioning

confidence: 99%

Psychrotolerant Mesorhizobium sp. Isolated from Temperate and Cold Desert Regions Solubilizes Potassium and Produces Multiple Plant Growth Promoting Metabolites

et al. 2021

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Soil potassium (K) supplement depends intensively on the application of chemical fertilizers, which have substantial harmful environmental effects. However, some bacteria can act as inoculants by converting unavailable and insoluble K forms into plant-accessible forms. Such bacteria are an eco-friendly approach for enhancing plant K absorption and consequently reducing utilization of chemical fertilization. Therefore, the present research was undertaken to isolate, screen, and characterize the K solubilizing bacteria (KSB) from the rhizosphere soils of northern India. Overall, 110 strains were isolated, but only 13 isolates showed significant K solubilizing ability by forming a halo zone on solid media. They were further screened for K solubilizing activity at 0 °C, 1 °C, 3 °C, 5 °C, 7 °C, 15 °C, and 20 °C for 5, 10, and 20 days. All the bacterial isolates showed mineral K solubilization activity at these different temperatures. However, the content of K solubilization increased with the upsurge in temperature and period of incubation. The isolate KSB (Grz) showed the highest K solubilization index of 462.28% after 48 h of incubation at 20 °C. The maximum of 23.38 µg K/mL broth was solubilized by the isolate KSB (Grz) at 20 °C after 20 days of incubation. Based on morphological, biochemical, and molecular characterization (through the 16S rDNA approach), the isolate KSB (Grz) was identified as Mesorhizobium sp. The majority of the strains produced HCN and ammonia. The maximum indole acetic acid (IAA) (31.54 µM/mL) and cellulase (390 µM/mL) were produced by the isolate KSB (Grz). In contrast, the highest protease (525.12 µM/mL) and chitinase (5.20 µM/mL) activities were shown by standard strain Bacillus mucilaginosus and KSB (Gmr) isolate, respectively.

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Plant Growth Promoting Potential of Rhizobium Isolates and Soil Health

Cited by 9 publications

References 15 publications

Characterization of Plant Growth Promoting Rhizobial Isolates for Pigeon Pea (Cajanus cajan [L.] Millsp)

Characterization of Plant Growth Promoting Rhizobial Isolates for Pigeon Pea (Cajanus cajan [L.] Millsp)

Potassium Forms in Brown Sarson Growing Soils in District Kupwara, Kashmir

Psychrotolerant Mesorhizobium sp. Isolated from Temperate and Cold Desert Regions Solubilizes Potassium and Produces Multiple Plant Growth Promoting Metabolites

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