Vegetos 

About: Vegetos is an academic journal published by Springer Science+Business Media. The journal publishes majorly in the area(s): Biology & Medicine. It has an ISSN identifier of 0970-4078. Over the lifetime, 1430 publications have been published receiving 4249 citations.

Influence of inceptisol and alfisol's Potassium Solubilizing Bacteria (KSB) isolates on release of K from waste mica

Abstract: Major part of potassium in soil exists in form of insoluble K-minerals. Fraction of Ksolubilized from such minerals through potassium solubilizing bacteria (KSB) will reduce cost on import of K- fertilizers. Nine and four isolates of K-solubilizing bacteria from Inceptisol (KI) and Alfisol (KA), respectively were evaluated for their ability to release of K from waste mica at 7, 14 and 21 days of incubation in modified Aleksandrov medium containing powdered waste mica as sole source of potassium. Morphological characteristics, zone of solubilization at week end and acidity of broth at different incubation periods were also studied. Majority of the isolates were entire smooth margin, raised, translucent, gram +ve rods and whitish to creamy in appearance. Isolates from cereals caused more zone of solubilization than pulse isolates. Isolates either from Alfisol or from Inceptisol efficiently decreased pH of the broth with increase in incubation periods. Isolates of same soil type differed in their K-release capacity. KSB isolates from Inceptisol showed higher K solubilization potential than isolates from Alfisol. Isolate KI1 & KA19 caused maximum acidity but lowest release of K from mica indicated that decrease in pH of the medium is not the only mechanism of K release from native K mineral of soil. Isolate KI16 and KA59 were high slime producer and showed highest 23.88 and 13.71 μg mL−1 K solubilization capacity, respectively and emerged out as potential isolates of Ksolubilizers as a K- biofertilizers.

Can we use Maize (Zea mays) Rhizobacteria as Plant Growth Promoter

Abstract: Plant Growth Promoting Rhizobacteria (PGPR) is a group of bacteria that has the ability to enhance plant growth and yield via various plant growth promoting substances as well as biofertilizers. Ten bacterial isolates screened from rhizosphere of maize growing at Indo-Gangetic plain of eastern Uttar Pradesh, India showed potential nutrients solubilization and plant growth promoting activities. Rhizobacterial were able to produce phytohormone auxin (IAA) in the tryptophan supplemented medium which showed maximum production by strain BHU8. Phosphate solubilization activity was highly observed in isolate BHU8 followed by BHU3, BHU9 and BHU10. Plant cell wall hydrolyzing enzymes (Cellulase and Pectinase) were expressed in BHU3, BHU8, BHU9 and BHU10 and among ten rhizobacterial strains only six strains (BHU1, BHU2, BHU3, BHU5, BHU8 and BHU10) produced siderophore. Based on 16S rDNA gene sequence strains BHU1, BHU2, BHU3, BHU8, BHU10 showed 99.6%, 99.8%, 99.8%, 99.7% and 99.9% sequence alignment respectively with Pseudomonas brassicacearum, Pseudomonas taiwanensis Pseudomonas aeruginosa, Pseudomonas saponiphila and Pseudomonas oryzihabitans, respectively whereas strains BHU4 and BHU5 showed 99.7% similarity with Rhizobium radiobacter and strains BHU6 and BHU9 showed 99.9% sequence aligned with Bacillus oceanisediminis and Bacillus flexus, respectively. Strain BHU7 exhibited 99.9% similarity with Enterobacter asburiae.

Phenolic Content, Reducing Power and Membrane Protective Activities of Solanum xanthocarpum Root Extracts

Abstract: Present study reports the reducing and lipo-protective activities of phytoconstituents present in S. xanthocarpum root. The phytochemicals were sequentially extracted with the solvents with increasing polarity. Differential amount of total phenolic contents was present in various root extracts. Polar fractions accounted for higher phenolics contents. Ethyl alcohol (ET) extract exhibited maximum phenolics content (101.78 ±0.41 mg catechol equivalent/g) followed by ethyl acetate (EA) and aqueous (AQ) extracts (59.55 ±0.25 and 45.32 ±0.33 mg CE/g, respectively). Reducing power and lipo-protective activities were assessed for the determination of antioxidant capacity. Lipo-protective activity was determined by lipid peroxidation inhibition (LPOI) assays in tissue (rat kidney) homogenate. ET, AQ and HX (hexane) fractions demonstrated considerable reducing power at different test concentrations exhibiting dose dependent response in the range 250–1000 μg/ml. Some of the polar extracts produced about 50% protection against lipid peroxidation. Analysis of the data showed positive correlation of reducing power with total phenolic content (r2=0.322) and %LPOI (r2=0.317). The relationship between total phenolics content and %LPOI was also found to be positive (r2=0.539).

Vegetational Structure, Diversity and Fuel Load in Fire Affected Areas of Tropical Dry Deciduous Forests in Chhattisgarh

Abstract: Forest fires are shaping forest vegetation and landscape in many parts of India and cause great loss to the forest ecosystem, diversity of flora and fauna and economic wealth. The study was conducted to analyze the structure and diversity of vegetation in different fire regimes and to assess the fuel load in tropical dry deciduous forest. Delineation and identification of fire prone areas were done on the basis of historical ground fire data in conjunction with satellite remote sensing data provided by NRSA. The composition, structure and diversity of different forest fire zones was conducted by stratified random sampling to measure trees, saplings, seedlings, shrubs, herbs and litter. The regeneration pattern of the different forest fire zones was prepared by graphical population structures. The fuel load for each fire zones was estimated. The duffs litter and wood litter of all fire zones were weighed separately. Along the fire gradients the tree species exhibited highest density of seedlings in low fire zone. The highest density of saplings and trees were present in non-fire zone whereas shrubs and herbs layer showed the highest density in medium fire zone. In this study we found that non-fire zone contained more species as compared to burnt areas. The diversity pattern showed that the medium fire zone showed maximum diversity followed by non-fire zone, whereas low fire zone had minimum Shannon index. The regeneration pattern of tree species in all the fire zones and non-fire zone generally showed five general patterns. In the high fire zone the seedlings were much affected which will result discontinuation of conversion into saplings with the progress of time and ultimately the gap in the regeneration status.

Evaluation of biochemical changes in leaves of tomato infected with Alternaria alternata and its metabolites.

Abstract: The present study was carried out to evaluate the biochemical changes occurring in tomato leaves following treatment with leaf spot disease causing pathogen Alternaria alternata and two of its phytotoxic metabolites. Results revealed that the pathogen treatment caused severe foliar necrosis and by 10th day of treatment almost 3/4th of the leaf area was necrotized. A significant decline in the chlorophyll content was observed in the leaves treated with the pathogen and its metabolites. Reducing sugars showed a visible decline in the treated leaves in comparison to the control leaves. When compared with the control an increase in total soluble protein was observed in leaves treated with the pathogen and its metabolites. In case of phenol, a significant enhancement in phenol content of the pathogen and metabolite treated leaves was observed than the amount detected in control leaves. The results indicate that infection of tomato by the leaf spot pathogen Alternaria alternata and its metabolites causes severe alterations in the amount of various biochemical components.