Spermatogenesis and related plasma androgen and progestin level in wild male golden mahseer,Tor putitora (Hamilton, 1822), during the spawning season     

Neetu Shahi  Sumanta Kumar Mallik  Jyoti Pande  Partha Das  Atul Kumar Singh 《Fish physiology and biochemistry》2015,41(4):909-920

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Effects of transition season management on soil N dynamics and system N balances in rice–wheat rotations of Nepal     

M. Becker  F. Asch  S.L. Maskey  K.R. Pande  S.C. Shah  S. Shrestha 《Field Crops Research》2007

In the low-input rice–wheat production systems of Nepal, the N nutrition of both crops is largely based on the supply from soil pools. Declining yield trends call for management interventions aiming at the avoidance of native soil N losses. A field study was conducted at two sites in the lowland and the upper mid-hills of Nepal with contrasting temperature regimes and durations of the dry-to-wet season transition period between the harvest of wheat and the transplanting of lowland rice. Technical options included the return of the straw of the preceding wheat crop, the cultivation of short-cycled crops during the transition season, and combinations of both. Dynamics of soil N_min, nitrate leaching, nitrous oxide emissions, and crop N uptake were studied throughout the year between 2004 and 2005 and partial N balances of the cropping systems were established. In the traditional system (bare fallow between wheat and rice) a large accumulation of soil nitrate N and its subsequent disappearance upon soil saturation occurred during the transition season. This nitrate loss was associated with nitrate leaching (6.3 and 12.8 kg ha⁻¹ at the low and high altitude sites, respectively) and peaks of nitrous oxide emissions (120 and 480 mg m⁻² h⁻¹ at the low and high altitude sites, respectively). Incorporation of wheat straw at 3 Mg ha⁻¹ and/or cultivation of a nitrate catch crop during the transition season significantly reduced the build up of soil nitrate and subsequent N losses at the low altitude site. At the high altitude site, cumulative grain yields increased from 2.35 Mg ha⁻¹ with bare fallow during the transition season to 3.44 Mg ha⁻¹ when wheat straw was incorporated. At the low altitude site, the cumulative yield significantly increased from 2.85 Mg ha⁻¹ (bare fallow) to between 3.63 and 6.63 Mg ha⁻¹, depending on the transition season option applied. Irrespective of the site and the land use option applied during the transition season, systems N balances remained largely negative, ranging from −37 to −84 kg N ha⁻¹. We conclude that despite reduced N losses and increased grain yields the proposed options need to be complemented with additional N inputs to sustain long-term productivity.  相似文献   

Papaya yellow leaf curl virus: A newly identified begomovirus infecting Carica papaya L. from the Indian Subcontinent     

Chitra Nehra  Avinash Marwal  Rakesh Kumar Verma  Megha Mishra  Pradeep Sharma 《The Journal of Horticultural Science and Biotechnology》2019,94(4):475-480

India is one of the world’s largest producers of papaya. Viruses, mainly begomoviruses and potyviruses, cause a significant loss in papaya production. The study described here has identified a new species of begomovirus and a new species of betasatellite infecting Carica papaya in India. The sequences of the begomovirus and betasatellite show 90.03% nucleotide sequence identity to an isolate of Radish leaf curl virus and 92.25% identity to an isolate of Tomato leaf curl betasatellite, respectively. Maximum likelihood phylogenetic tree of begomovirus sequence of isolate DP2 (KX353622) showed distant relationships with previously characterised begomoviruses. Recombination analysis proposed six recombination breakpoints in begomovirus genome with other geographical begomovirus isolates.  相似文献   

Gharial (Gavialis gangeticus) populations and human influences on habitat on the River Chambal,India     

Suyash Katdare  Arjun Srivathsa  Apoorva Joshi  Pritish Panke  Ruchik Pande  Dharmendra Khandal  Mark Everard 《水产资源保护:海洋与淡水生态系统》2011,21(4):364-371

Mitochondrial phylogeography reveals high haplotype diversity and unique genetic lineage in Indian dugongs (Dugong dugon)     

Yellapu Srinivas  Anant Pande  Swapnali Gole  P.V.R. Prem Jothi  K. Madhu Magesh  Sameeha Pathan  Sohini Dudhat  Rukmini Shekar  Chinmaya Ghanekar  Devanshi Kukadia  Jeyaraj Antony Johnson  Samrat Mondol  Kuppusamy Sivakumar 《水产资源保护:海洋与淡水生态系统》2021,31(4):818-829

1. India plays a significant role in dugong conservation by having the largest population within South Asia. The status of dugongs in India is largely unknown due to a paucity of reliable ecological data. This study generated mitochondrial control region sequences from ~10% of dugong individuals from existing populations within India. Furthermore, data generated in this study were compared with the global data to assess genetic lineages, population structure, and genetic diversity of Indian populations.
2. Multiple analyses suggest that the Indian dugong populations are part of a single genetic cluster, comprising South Asia, North-west Indian Ocean, and South-west Indian Ocean populations. Despite small population size, they retain high genetic diversity with unique mitochondrial DNA haplotypes within South Asia. Within India, novel haplotypes are observed from all dugong habitats sampled, with overall high haplotype diversity (0.85 ± 0.04) but low nucleotide diversity (0.005 ± 0.001). Indian populations exhibit genetic differentiation with higher within-population variance (63.41%) than among populations (36.59%). Two of the haplotypes observed in India are shared with Sri Lanka, implying genetic connectivity between these populations.
3. The genetic data from Indian dugong populations provide critical insights into the identification of dugong corridors and important dugong conservation zones in India. We suggest site-specific interventions, including the creation of new marine protected areas and boundary reorganization and expansion of other existing protected areas, to ensure population connectivity. In addition, simultaneous efforts towards seagrass meadow restoration, reduction of dugong mortalities, and community participation in dugong conservation are recommended for population recovery of this threatened marine herbivore.

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Studies on bacteriological quality of nainital lake water in different seasons     

Jyotsna Pande  S. M. Das  D. S. Misra 《Water, air, and soil pollution》1983,19(2):149-154

The total coliform and E. coli load of Nainital lake water in different seasons has been studied. The variation of these organisms with season, rainfall and human activities in the catchment area were observed.  相似文献   

Giant eimerian schizonts in the Indian water-buffalo     

B B Bathia  B P Pande 《Acta veterinaria Academiae Scientiarum Hungaricae》1967,17(4):351-357

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Eimeria mrigai n. sp. (Eimeriidae: Sporozoa) in black buck (Antelope cervicapra)     

B P Pande  P P Chauhan  B B Bhatia  G S Arora 《Acta veterinaria Academiae Scientiarum Hungaricae》1972,22(3):225-230

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On eimerian oocysts from the purple moorhen (Porphyrio porphyrio L.) and the coot (Fulica atra atra). A preliminary study     

B B Bathia  B P Pande 《Acta veterinaria Academiae Scientiarum Hungaricae》1967,17(4):347-349

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Biological Control of Late Leaf Spot of Peanut (Arachis hypogaea) with Chitinolytic Bacteria     

Kishore GK  Pande S  Podile AR 《Phytopathology》2005,95(10):1157-1165

ABSTRACT Late leaf spot (LLS), caused by Phaeoisariopsis personata, is a foliar disease of groundnut or peanut (Arachis hypogaea) with high economic and global importance. Antifungal and chitinolytic Bacillus circulans GRS 243 and Serratia marcescens GPS 5, selected among a collection of 393 peanut-associated bacteria, were applied as a prophylactic foliar spray and tested for control of LLS. Chitin-supplemented application of B. circulans GRS 243 and S. marcescens GPS 5 resulted in improved biological control of LLS disease. Supplementation of bacterial cells with 1% (wt/vol) colloidal chitin reduced lesion frequency by 60% compared with application of bacterial cells alone, in the greenhouse. Chitinsupplemented application of GRS 243 and GPS 5 also resulted in improved and stable control of LLS in a repeated field experiment and increased the pod yields by 62 and 75%, respectively, compared with the control. Chitin-supplemented application of GPS 5 was tested in six onfarm trials, and the increase in pod yields was up to 48% in kharif (rainy season). A 55-kDa chitinase was purified from the cell-free culture filtrate of GPS 5 by affinity chromatography and gel filtration. Purified chitinase of S. marcescens GPS 5 (specific activity 120 units) inhibited the in vitro germination of P. personata conidia, lysed the conidia, and effectively controlled LLS in greenhouse tests, indicating the importance of chitinolysis in biological control of LLS disease by GPS 5.  相似文献