Soil biochemical activity

The bacteria capable of fixing atmospheric nitrogen were isolated from cassava cultivated soils of Vietnam. The potential isolates were identified by analyzing the 16S rRNA gene and by morphological, biochemical, cultural characteristics. The selected isolates were assigned to the species Bacillus sp. DQT2 M17, Bacillus subtilis DTAN6 M17, and Bacillus megaterium DSHB I8.

9p vicaptainmarvel 21-04-2023 5 2   Download

The study "Biochar mitigates salt stress by regulating nutrient uptake and antioxidant activity, alleviating the oxidative stress and abscisic acid content in cabbage seedlings" was conducted as factorial completely randomized design with two factors; salinity levels (0 and 150 mM NaCl) and biochar doses (weighed at the rate of 0%, 2.5%, and 5% by soil weight). Growth parameters such as stem diameter, leaf area, shoot fresh weight, root fresh weight, shoot dry weight, and root dry weight of cabbage seedlings treated with 150 mM NaCl were lower than the control.

10p lyhuyenthu 31-01-2023 6 2   Download

A carboxymethylcellulose (CMC)-degrading bacterium was isolated from soil, identified as Bacillus methylotrophicus according to the physiological properties and analyses of 16S rRNA and a partial sequence of the gyrase A (gyrA) gene, and named as B. methylotrophicus Y37. The CMCase enzyme was purified to homogeneity by 20.4-fold with 21.73% recovery using single-step hydrophobic interaction chromatography and biochemically characterized. CMCase showed a molecular weight of approximately 50 kDa as determined by SDS-PAGE.

14p langthannam 29-12-2021 9 0   Download

In this paper, the protective role of melatonin in counteracting metal-induced free radical generation was highlighted. Using the HPLC-FLD technique melatonin was identified and quantified in the roots and leaves of lemon balm (Melissa officinalis L.), grown under photoperiod conditions. Furthermore, the response of plants pre-treated with exogenous 0.1 mM melatonin to the increased zinc (Zn) and cadmium (Cd) concentrations was observed, with changes in mineral (Ca, Mg), physiological and antioxidant status of the plant during heavy metals stress.

12p tudichquannguyet 29-11-2021 13 1   Download

The rhizosphere is part of the soil surrounding the plant roots or being influenced by the plant roots. The exudates released from roots make it a site for complex biochemical activity. Microorganisms make up one of the dynamic parts of this rhizosphere, and affect soil and plant growth by various means.

6p caygaocaolon11 21-04-2021 10 1   Download

Enhancement in phosphorus (P) efficiency of crop plants require a better understanding of alterations in root architecture phenes and physio-biochemical processes under phosphorus deprived condition. This study analyzed the morpho-physiological and biochemical alterations associated with P efficiency of crop. Six pigeonpea [Cajanus cajan (L.) Millsp] genotypes (AL1758, AL1817, AL201, H005, ICPL93081, and ICPL88039) were tested under two P treatments [P fertilizer not added in soil and recommended dose of P (Single Super phosphate @ 250kg/ ha)].

15p trinhthamhodang1218 26-02-2021 20 2   Download

These chitinase-producing bacterial strains were tested for antagonistic activity against the causal agent of bulb and stem rots of lilies, Fusarium oxysporum, and the results indicated antifungal activity of the four strains HP02, VRQ9, HM03, and GL10. The HP02 strain had the highest level of chitinase activity and was capable of being antagonistic to Fusarium oxysporum. Based on morphological and biochemical characteristics, 16S rRNA gene sequencing, and phylogenetic analysis of this sequence along with sequences from GenBank, HP02 was identified as Bacillus subtilis.

11p gaocaolon8 09-11-2020 19 1   Download

The study revealed that the Suggestive module (M4) showed great impact not only against major pests of chilli viz., Scirtothrips dorsalis, Polyphagotarsonemus latus, Helicoverpa armigera and Spodoptera litura but also on the activity of natural enemies like Chrysopera carnea, Cheilomenes sexmaculatus, Coccinella septampunctata and Oxypes sp...

11p cothumenhmong7 08-09-2020 19 1   Download

A pot culture experiment was conducted in earthen pots contains 5 kg of well mixed air dried red sandy loam soil. The rice var. BPT 5204 used as test crop. Carefully selected uniform sized seeds were directly sowed in each pot.

7p trinhthamhodang7 31-08-2020 10 1   Download

In the present study ten different Bacillus isolates were isolated from various soil samples and their identification was performed on the basis of Gram staining, colony morphology and biochemical tests. Gram positive rod shaped bacteria showing large, circular, opaque colonies having white or greyish white appearance were preserved on Nutrient agar slants for further identification. All isolates showed positive results for Catalase, Urease, Oxidase and motility biochemical tests.

12p caygaocaolon6 30-07-2020 25 1   Download

Most Bacillus species have ability to produce secondary metabolites such as amylases and biosurfactants. This study was carried out to determine the amylase and boisurfactant production potentials of some Bacillus species obtained from agricultural soil. Soil samples were collected from agricultural research farm of Adekunle Ajasin University, Akungba-Akoko, Ondo State, Nigeria. All isolates were identified based on the morphological and biochemical characteristics using Bergey’s manual of determinative bacteriology.

9p caygaocaolon6 30-07-2020 16 2   Download

Soil forms an integral part of the ecosystem and at present the quality of a soil is defined not only in terms of its productive capacity, but also by taking the ecosystem into consideration. Consequently, when soil productivity has to be maximized, environmental effects must be given proper consideration. Thus the changes in soil quality caused by different types of land use must first be quantified for attaining sustainability in use and management.

14p trinhthamhodang6 09-07-2020 19 1   Download

Fomesafen is widely used as herbicide for weed control. Fomesafen have both foliar and soil activity. It mostly control broadleaves. Fomesafen is labeled for postemergence applications to soybeans, peanuts, and rice. Although bronzing or burning of soybean leaf tissue is evident after application, yield is rarely affected. The present study was designed to evaluate the effect of repeated exposure of Fomesafen (Herbicide) by oral gavage method on the blood biochemistry of female wistar rats.

9p kethamoi6 29-06-2020 17 1   Download

Phosphorus is a major limiting factor for plant growth particularly in the tropics and subtropics areas. It play an important role in many biochemical process viz., energy storage and transfer, cell division, cell enlargement and several other processes in plants. The availability of P to plants is a problem owing to its slow diffusion and high fixation in soils. Due to low solubility and mobility in soil, phosphorus use efficiency is very low ranges from 10-20% in normal soil.

7p kethamoi6 29-06-2020 12 0   Download

Amylase with maximum activity at alkaline pH prefers most industrial applications. The present study investigate amylase production and optimization by bacterial strain isolated and identified from rice mill waste dumped soil. The potent isolate KR9 was identified based on biochemical characteristics and 16S rRNA gene analysis confirmed that this isolate belonged to the genus Bacillus and it was most closely related to B. cereus (99 % similarity). The selected isolate B. cereus KR9 was optimized for pH, growth period and carbon and nitrogen sources.

9p nguaconbaynhay6 23-06-2020 17 0   Download

Zinc (Zn) is a micronutrient, which is involved in activating many physiological and biochemical processes. Inadequate supply of Zn affects crop growth, development and in turn yields. Most of us depend on agriculture based foods which are grown under inadequate Zn supply and hence we get less of Zn as recommended. A few strategic approaches are being adapted to overcome inadequacy of Zn in food. Biofortification is one of the best strategies to enhance the Zn content in the food grain.

9p quenchua6 15-06-2020 12 1   Download

Study was conducted to isolate and analyse the plant growth promotional activity of Bacillus strains isolated from Doni river belt of Vijayapura district. Total of 30 isolates were obtained from 15 rhizosphere soil samples. Further all the isolates were subjected for P-solubilization efficiency. All the 30 isolates showed zone of solubilization on Pikovskaya’s media.

12p quenchua6 15-06-2020 8 2   Download

Analysis of defense-related enzymatic activities of the fungal bioagents viz., Trichoderma viride, T. harzianum, Pochonia chlamydosporia and Purpureocillium lilacinum against root-knot nematode Meloidogyne incognita on Tomato were carried out and revealed that all the tested fungal bioagents have the ability to induce defense-related enzymatic activity against M.

16p angicungduoc5 14-06-2020 6 0   Download

Phosphate is the key macronutrient required for the growth of plants. The soluble forms of phosphorus when applied to soil are rendered insoluble by undergoing chemical fixation. The soil collected from organic farm, SKUAST- Jammu was investigated for screening the phosphate solubilizing bacteria. In the present study, soil samples were collected from rice rhizosphere of sixteen varieties grown in OFRC, SKUAST- Jammu. This study revealed the existence of Phosphate Solublizing bacteria in the rhizosphere soils of rice.

8p trinhthamhodang1213 29-05-2020 11 0   Download

Nutrient supply and availability during crop growth influences various microbial mediated biochemical reactions and nutrient transformations. Studies were conducted during kharif season of 2015-16 and 2016-17 in the farmer field of Vijayanagar camp, tq/dist: raichur, to study the influence of different nutrient management approaches on soil enzyme activity, soil microbial population and grain yield of dry DSR.

9p chauchaungayxua5 08-05-2020 6 1   Download