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1.
K Swarup N P Tewari A K Srivastav 《Archives d'anatomie microscopique et de morphologie expérimentale》1986,75(4):271-277
Psittacula psittacula when subjected to long term hypercalcemia by intramuscular injections of vitamin D2 (20,000 I.U.) on alternate days and by increasing dietary calcium, exhibit a rise in the serum calcium level after 10, 20 and 30 days of treatment as compared to their corresponding controls. The ultimobranchial cells show progressive hypertrophy up to 20th day of the treatment. From 20th day till the end of the experiment (30 days) these cells show feeble staining response. The parathyroid glands suffer from degenerative changes due to its inactivity under chronic hypercalcemia. 相似文献
2.
Sadhana A. Samant Deepti D. Deobagkar N. N. Godbole Dileep N. Deobagkar 《Journal of genetics》1989,68(2):109-116
Sequences homologous to oncogeneyes (Y73/Esh/sarcoma viral oncogene cDNA) in theDrosophila melanogaster Oregon genome were detected byin situ hybridization on salivary gland chromosomes. Three separate sites, 8D/X, 57BC/2R and 95CD/3R, were identified. Presence of
sequences highly homologous toyes in the genomic DNA was confirmed by dot blot hybridization under high stringency conditions. 相似文献
3.
Pradhan Satyabrata Singh Sanjay Kumar Srivastav Manish Prakash Jai Lal Sanjay Kumar Padaria Jasdeep Chatrath Goswami Amit Kumar Maurya Naveen Kumar 《Plant Cell, Tissue and Organ Culture》2021,145(1):155-172
Plant Cell, Tissue and Organ Culture (PCTOC) - A method for in vitro screening and selection of drought (moisture stress) tolerant mango calli was developed. Poly ethylene glycol (PEG) (Molecular... 相似文献
4.
Siddharthan Surveswaran Sharad S. Kambale Mansa Srivastav Sachin A. Punekar Shrirang R. Yadav K. Praveen Karanth 《植物分类学报:英文版》2021,59(1):93-112
The Indian subcontinent has experienced a major shift in climatic regime from a wet tropical regime to increased seasonal rainfall, since the late Miocene. This shift has been attributed to the intensification of monsoons, which led to opening up of dry habitats in humid forests and formation of deciduous forests. We explored the role of this climatic shift in the origin and diversification of dry‐adapted plant genera Ceropegia and Brachystelma (Ceropegiae, Asclepiadoideae, Apocynaceae). We sampled Ceropegia and Brachystelma from across India and used five markers (two nuclear and three plastid regions) to reconstruct a global phylogeny of this group. Indian members of the tribe Ceropegiae were derived from Africa through at least four independent dispersal events. All dispersal events occurred in late Miocene after establishment of a monsoon climate. One of these early dispersing lineages underwent rapid radiation in peninsular India, giving rise to around 50 species. Thus, both dispersal and diversification events coincided with the intensification of monsoons and concomitant aridification. The role of environment in the evolution of floral characteristics and root type in the Indian radiation is also discussed. This is one of the first reports on a dry‐adapted endemic radiation of plants in India. 相似文献
5.
Dharmendra Singh Chandan Kumar Singh Ram Sewak Singh Tomar Jyoti Taunk Ranjeet Singh Sadhana Maurya Ashish Kumar Chaturvedi Pal Madan Singh Rajendra Dubey Sarawan Kumar 《PloS one》2016,11(1)
The success of drought tolerance breeding programs can be enhanced through molecular assortment of germplasm. This study was designed to characterize molecular diversity within and between Lens species with different adaptations to drought stress conditions using SSR markers. Drought stress was applied at seedling stage to study the effects on morpho-physiological traits under controlled condition, where tolerant cultivars and wilds showed 12.8–27.6% and 9.5–23.2% reduction in seed yield per plant respectively. When juxtaposed to field conditions, the tolerant cultivars (PDL-1 and PDL-2) and wild (ILWL-314 and ILWL-436) accessions showed 10.5–26.5% and 7.5%–15.6% reduction in seed yield per plant, respectively under rain-fed conditions. The reductions in seed yield in the two tolerant cultivars and wilds under severe drought condition were 48–49% and 30.5–45.3% respectively. A set of 258 alleles were identified among 278 genotypes using 35 SSR markers. Genetic diversity and polymorphism information contents varied between 0.321–0.854 and 0.299–0.836, with mean value of 0.682 and 0.643, respectively. All the genotypes were clustered into 11 groups based on SSR markers. Tolerant genotypes were grouped in cluster 6 while sensitive ones were mainly grouped into cluster 7. Wild accessions were separated from cultivars on the basis of both population structure and cluster analysis. Cluster analysis has further grouped the wild accessions on the basis of species and sub-species into 5 clusters. Physiological and morphological characters under drought stress were significantly (P = 0.05) different among microsatellite clusters. These findings suggest that drought adaptation is variable among wild and cultivated genotypes. Also, genotypes from contrasting clusters can be selected for hybridization which could help in evolution of better segregants for improving drought tolerance in lentil. 相似文献
6.
Alexey?TeplyakovEmail author Sadhana?Pullalarevu Galina?Obmolova Victoria?Doseeva Andrey?Galkin Osnat?Herzberg Miroslawa?Dauter Zbigniew?Dauter Gary?L?GillilandEmail author 《BMC structural biology》2004,4(1):5
Background
The yffB (PA3664) gene of Pseudomonas aeruginosa encodes an uncharacterized protein of 13 kDa molecular weight with a marginal sequence similarity to arsenate reductase from Escherichia coli. The crystal structure determination of YffB was undertaken as part of a structural genomics effort in order to assist with the functional assignment of the protein. 相似文献7.
Building on the lead from antimalarial isonitriles 1-4 of marine origin, several easily accessible synthetic isonitriles were assessed for their antimalarial activity against Plasmodium falciparum (in vitro) and multidrug resistant Plasmodium yoelii in Swiss mice model (in vivo). Isonitrile 11 has shown promising activity in both these assays. 相似文献
8.
A new immobilization matrix based on zeolite has been developed to immobilize Azotobacter chroococcum, for fixing nitrogen, with an intention to hold the cells in the root zone of the plants and to protect them under stressful
conditions. The matrix has been developed by modifying the surface of the zeolite with surfactant. This enhances the hydrophobicity
of the material and also modifies the surface charge, which in turn enhances the immobilization. Surface modified zeolite-A
(SMZ-A) has been compared with commercial zeolite-A (CZA) for immobilization efficiency. CZA is non-toxic for A. chroococcum but is inefficient to adsorb the cells whereas SMZ-A showed 100% adsorption of the microbial cells wherein it was observed
that for 1 l of broth culture with total viable count of 108 cfu ml−1 cells of A. chroococcum, a minimum dose of 0.7 g SMZ-A and minimum contact time of 10 h is required to achieve 100% adsorption. Adsorption was confirmed
by the cell count and light as well as scanning electron microscopy. Most importantly, the cells adsorbed on SMZ-A could fix
the atmospheric nitrogen up to 13 mg g−1 sucrose consumed, which was comparable with the control (unadsorbed cells), which confirms the survival and nitrogen fixation
activity of the bacteria.
Responsible Editor: Euan K. James. 相似文献
9.
In vitro anti-mycobacterial activities of several 5-substituted acyclic pyrimidine nucleosides containing 1-(2-hydroxyethoxy)methyl and 1-[(2-hydroxy-1-(hydroxymethyl) ethoxy)methyl] acyclic moieties are investigated against three mycobacteria viz. Mycobacterium tuberculosis, Mycobacterium bovis, and Mycobacterium avium, which cause serious infections and mortality in healthy people as well as patients with AIDS. 1-(2-Hydroxyethoxy)methyl-5-(1-azido-2-haloethyl or 1-azidovinyl) analogs (4-7), 1-[(2-hydroxy-1-(hydroxymethyl)ethoxy)methyl]-5-decynyluracil (37), and 1-[(2-hydroxy-1-(hydroxymethyl)ethoxy)methyl]-5-dodecynyluracil (38) exhibited significant in vitro anti-tubercular activity against these mycobacteria. 相似文献
10.