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排序方式: 共有112条查询结果,搜索用时 31 毫秒
21.
Pankaj Kumar Mishra Shekhar Chandra Bisht Krishnan Jeevanandan Sanjay Kumar Jaideep Kumar Bisht Jagdish Chandra Bhatt 《Archives of Agronomy and Soil Science》2013,59(6):799-815
Plant growth-promoting bacteria (PGPB) Pseudomonas lurida-NPRp15 and Pseudomonas putida-PGRs4 possessing multiple plant growth-promoting traits were isolated from rhizoplane of pea and rhizosphere of garlic, respectively. The effects of individuals and combinations of Pseudomonas spp. with effective root nodulating symbiotic nitrogen fixing Rhizobium leguminosarum-FB1 on plant growth, nutrient uptake and yield of the rajmash plant were studied under greenhouse conditions. Bacterial inoculation resulted in significantly higher values for plant dry biomass, N, P, K, Zn and Fe contents as compared to the uninoculated control. Furthermore, dual inoculation of P. lurida-NPRp15 with R. leguminosarum-FB1 significantly increased root and shoot dry weight, nodulation, nutrient uptake, pod yield, and nutrient content of pods of rajmash VL63 compared to controls, single and triple inoculation. The results of the study indicate the potential of harnessing the benefit of plant growth-promoting and nitrogen-fixing microorganisms to improve the growth and yield of rajmash. 相似文献
22.
R. Raina S. Prawez D.J. Dimitrova N.K. Pankaj P.K. Verma 《Journal of veterinary science (Suw?n-si, Korea)》2008,9(3):241-245
We evaluated the pharmacokinetics of ciprofloxacin in serum (n = 6) and urine (n = 4) in goats following a single intravenous administration of 4 mg/kg body weight. The serum concentration-time curves of ciprofloxacin were best fitted by a two-compartment open model. The drug was detected in goat serum up to 12 h. The elimination rate constant (β) and elimination half-life (t1/2β) were 0.446 ± 0.04 h-1 and 1.630 ± 0.17 h, respectively. The apparent volume of distribution at steady state (Vdss) was 2.012 ± 0.37 l/kg and the total body clearance (ClB) was 16.27 ± 1.87 ml/min/kg. Urinary recovery of ciprofloxacin was 29.70% ± 10.34% of the administered dose within 36 h post administration. In vitro serum protein binding was 41% ± 13.10%. Thus, a single daily intravenous dose of 4 mg/kg is sufficient to maintain effective levels in serum and for 36 h in urine, allowing treatment of systemic, Gram-negative bacterial infections and urinary tract infections by most pathogens. 相似文献
23.
Pankaj Kumar Srivastava Manjul Gupta Shikha Nandita Singh Shri Krishna Tewari 《Land Degradation \u0026amp; Development》2016,27(4):1245-1254
A novel bioaugmented organic amendment (SFOA) [consisted of vermicompost (pre‐enriched with plant growth promoting fungi) mixed with pressmud and Azadirachta indica (A. Juss.) seed cake] was developed to reclaim sodic soil and support wheat production. A field trial of the SFOA application with/without chemical fertilizers conducted in completely randomized design with four replications to compare growth, yield and seed protein contents of wheat (Triticum aestivum L.) on sodic soil. The favourable changes occurred in different properties of amended soils were studied. A combined application of chemical fertilizer and SFOA significantly (p < 0·05) increased the number of spikelet per plant (63%) and weight of grains per ear (65%) in the amended soil compared with the control. Likewise, the grain yield, weight of 1000 grains and seed protein contents of wheat were significantly (p < 0·05) increased in the combined application compared with other treatments. The expression of protein bands with molecular weights of 36, 52 and 66 kDa were higher in seeds of wheat under the combined treatment. The improvement in wheat production was attributed to significant favourable changes in different soil characteristics such as bulk density, total organic C, alkaline phosphatase, β‐glucosidase, dehydrogenase and cellulase activities that were increased by 234%, 181%, 234%, 176%, 189% and 150%, respectively, in case of amended soil under the combined treatment compared with the control. The tested SFOA may be recommended as soil amendment for reclaiming sodic soil and supporting wheat cultivation with better crop growth and yield in combination with chemical fertilizers on sodic soil. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
24.
Vinayagamurthy Balamurugan Paramasivam Saravanan Arnab Sen Kaushal Kishor Rajak Gnanavel Venkatesan Paramanandham Krishnamoorthy Veerakyathappa Bhanuprakash Raj Kumar Singh 《Journal of veterinary science (Suw?n-si, Korea)》2012,13(3):279-285
This study measured the clinical prevalence of peste des petits ruminants (PPR) among sheep and goats in India between 2003 and 2009 by analyzing clinical samples from suspected cases of PPR that were submitted to the Rinderpest and Allied Disease Laboratory, Division of Virology, IVRI, Mukteswar for PPR diagnosis. PPR outbreaks were confirmed by detecting PPR virus (PPRV)-specific antigen in the clinical samples. Clinical samples (blood, nasal swabs, spleen, lymph node, kidney, liver, intestine, and pooled tissue materials) were taken from a total of 592 sheep and 912 goats in different states of India and screened for the presence of PPRV antigen using a monoclonal antibody-based sandwich ELISA kit. A total of 20, 38, and 11 laboratory-confirmed PPR outbreaks occurred among sheep, goat, and combined sheep and goat populations, respectively. Our findings provide evidence of widespread PPR endemicity in India. The underlying reasons could be variations in husbandry practices in different geographical regions, agro-climatic conditions, and livestock migration. Furthermore, decrease in the number of PPR outbreaks over time might be due to the effectiveness of current live PPR vaccines and timely vaccination of target species. Vaccination against PPR has been practiced in India since 2002 to control this disease. 相似文献
25.
Pankaj Kumar Tripathi 《Pesticide biochemistry and physiology》2004,79(1):1-9
When the freshwater snail Lymnaea acuminata was exposed to sub-lethal doses (2.0, 5.0, and 8.0 mg/L) of carbaryl, fecundity was significantly reduced and even stopped at higher sub-lethal doses and altered metabolic activity in the body tissue of the snail was observed. The change from aerobic to anaerobic metabolism results in lesser energy production in the body tissues of the snails, causing paralysis and finally death. This reduced fecundity and altered metabolism suggests that it would be better to avoid the use of carbaryl pesticides in the water bodies or fields adjoining the water bodies particularly in the rainy season. 相似文献
26.
Azita Khorsandi Dai Shi Andrea K. Stone Aarti Bhagwat Yuping Lu Caishuang Xu Prem Prakash Das Brittany Polley Leonid Akhov Jessica Gerein Xiumei Han Pankaj Bhowmik L. Irina Zaharia James D. House Nandhakishore Rajagopalan Takuji Tanaka Darren R. Korber Michael T. Nickerson 《Cereal Chemistry》2024,101(1):131-143
27.
One-hundred and sixty-seven accessions belonging to 13 wild Oryza species were screened against the bacterial leaf blight (BB) pathogen (Xanthomonas oryzae pv. oryza) in Punjab, India. Nine species were identified as carrying resistant genes against the four most prevalent pathotypes under conditions in Punjab. These included O. barthii (eight accessions), O. longistaminata (five accessions), O. meridionalis (three accessions), O. nivara (five accessions), O. rufipogen (two accessions), and one accession each from O. punctata, O. minuta, O. malampuzhaensis and O. latifolia. This is the first report showing the availability of BB resistance in two species namely, O. meridionalis and O. punctata. The resistant accessions, especially those with a similar genome (AA) could potentially be used for the transfer of BB resistance to well-adapted high-yielding rice cultivars. 相似文献
28.
Quantitative observations on the biology of Metaphire houletti were made in cow and horse manure and oak litter in laboratory conditions over a period of 240 days. The study revealed that
copulation is not a prerequisite for production of viable cocoons, indicating that M. houletti may be parthenogenetic. The mean growth rate was 2.86 mg worm–1 day–1 reaching sexual maturity at 45 days and producing 0.015 cocoons worm–1 day–1 (kept singly) and 2.82 mg worm–1 day–1, reaching sexual maturity at 45 days and producing 0.03 cocoons worm–1 day–1 (kept in batches) in cow manure; 4.08 mg worm–1 day–1, reaching sexual maturity at 46 days and producing 0.02 cocoons worm–1 day–1 (kept singly) and 2.97 mg worm–1 day–1, reaching sexual maturity at 45 days and producing 0.016 cocoons worm–1 day–1 (kept in batches) in horse manure; 3.73 mg worm–1 day–1 reaching sexual maturity at 45 day and producing 0.023 cocoons worm–1 day–1 (kept singly) and 2.73 mg worm–1 day–1, reaching sexual maturity at 47 days and producing 0.028 cocoons worm–1 day–1 (kept in batches) in oak litter. After an incubation period of 31.9±1.2 days 82% of the cocoons hatched with a mean of 1.12±0.06
hatchlings per cocoon. The earthworms reared in batches did not demonstrate any advantage over those reared singly in all
substrates. Higher growth rates were observed in earthworms raised singly than those raised in batches in all substrates.
Received: 30 April 1998 相似文献
29.
Pankaj Kumar Srivastava Baleshwar Soumit Kumar Behera Nandita Singh Radhey Shyam Tripathi 《植物养料与土壤学杂志》2011,174(1):93-102
The study was conducted under the “Uttar Pradesh Sodic Lands Reclamation Project” to examine changes that occurred in the reclaimed sodic land in two districts of Uttar Pradesh, India. The study focuses on long‐term seasonal changes in the floral diversity and soil characteristics of the reclaimed sodic land over a period of 10 y. The changes in the floristic composition, plant density, and soil characteristics (microbial biomass carbon [MBC], pH, exchangeable‐sodium percentage (ESP), and electrical conductivity) were compared among the different study plots after different years of sodic‐land reclamation. The study plots comprised reclaimed land with rice–wheat cultivation; semireclaimed land under rice cultivation only and nonreclaimed barren sodic land. There was a significant variation in the floristic composition of the three study plots. Dominance in the floristic composition was shifted from monocotyledonous weeds in the nonreclaimed sodic land to dicotyledonous weeds in the reclaimed land after 10 y of reclamation. Among the soil characteristics, the most remarkable changes were observed in soil MBC and ESP during the course of sodic‐land reclamation. Soil MBC increased up to 480% and ESP values decreased up to 79% in the reclaimed plots with reference to the nonreclaimed plots. The soil amelioration was more pronounced in the upper layer (0–30 cm) as compared to the lower layer (below 30 cm depth). A positive significant correlation was revealed between soil MBC and floristic composition of the reclaimed plots. These changes in floristic composition and soil characteristics could be used as good indicators of the eco‐restoration of the sodic lands. The present study provides useful insights in understanding the temporal progress of eco‐restoration in the reclaimed sodic lands. 相似文献
30.
P. Kaushal D. R. Malaviya A. K. Roy Shalini Pathak A. Agrawal Ambica Khare S. A. Siddiqui 《Euphytica》2008,164(1):81-92
One hundred and sixty accessions representing global germplasm of guinea grass (Panicum maximum Jacq.), an important apomictic (aposporous) fodder crop, were subjected to study on reproductive diversity in apomictic seed
development utilizing ovule clearing and flow cytometric seed screen (FCSS). Single seed FCSS of selected 14 tetraploid and
five hexaploid lines demonstrated uncoupling between the three apomixis components, viz. apomeiosis, parthenogenesis and functional
endosperm development, in natural as well as experimental populations, though it differed across ploidy levels and genotypes.
Reconstruction of reproductive pathways yielded a total of eight different pathways of seed development, arising by uncoupling/recombination
between apomixis components. Amongst these, two pathways involving modifications in embryo-sac (ES) (presence of two polar
nuclei in aposporous ES that fuse prior to fertilization) and fertilization process (fusion of only one polar nucleus in a
sexual ES) have been reported for the first time. Some of the combinations, such as MI (haploids arising from parthenogenetic development of reduced egg cell), were found viable only in hexaploid background. Germplasm
lines with higher expression of individual components were also identified. These components (including autonomous endosperm
development) were also experimentally partitioned in hexaploid progenies (derived from a tetraploid parent viz. accession
IG 04-164) that showed segregation in their reproductive capacities, and are reported for the first time. Occurrence of several
apomixis recombinants (phenotypic) in guinea grass lines suggested their hybrid origin, favors a multigene model for apomixis,
with their penetrance affected by modifiers and epigenetic mechanisms, in contrast to earlier reports of single locus control.
Implications of partitioning components on apomixis research are discussed. 相似文献