‘Neodomesticates’ of the Himalayan allium spices (Allium species) in Uttarakhand,India and studies on eco-geography and morphology     

Pandey  Anjula  Malav  Pavan Kumar  Rai  Madhav K.  Ahlawat  S. P. 《Genetic Resources and Crop Evolution》2021,68(5):2167-2179

Genetic Resources and Crop Evolution - The study on Himalayan allium spices was undertaken with specific reference to commercially important taxa belonging to the genus Allium viz. A. stracheyi...  相似文献   

“Kalpa 1” a new late colour development apple (Malus domestica Borkh.) bud sport originated from cv. Starking Delicious     

Prasad  Heerendra  Kumar  K.  Thakur  Dinesh Singh 《Genetic Resources and Crop Evolution》2021,68(6):2273-2279

Genetic Resources and Crop Evolution - Breeding in perennial fruit crops is time consuming process with relatively low success rate as compared with annual crops. Apple fruit coloration is...  相似文献   

A note on distribution and potential of Japanese wild adzuki bean [Vigna angularis var. nipponensis (Ohwi) Ohwi and H. Ohashi] in India     

Bhatt  K. C.  Malav  Pavan Kumar  Gore  Padmavati G.  Tripathi  Kuldeep  Rathi  R. S.  Tiwari  Umeshkumar L.  Ahlawat  S. P. 《Genetic Resources and Crop Evolution》2021,68(5):2157-2166

Genetic Resources and Crop Evolution - The present paper deals with the report on the potential of Vigna angularis var. nipponensis (Ohwi) Ohwi and H. Ohashi assembled from Northeastern hill region...  相似文献   

Soil loss hinders the restoration potential of tree plantations on highly eroded ravine slopes     

Kumar  Raj  Bhardwaj  A. K.  Rao  B. K.  Vishwakarma  A. K.  Kakade  Vijaysinha  Dinesh  D.  Singh  Gaurav  Kumar  Gopal  Pande  V. C.  Bhatnagar  P. R.  Bagdi  G. L. 《Journal of Soils and Sediments》2021,21(2):1232-1242

Journal of Soils and Sediments - Soil erosion and loss threatens vast tracts of agricultural and non-agricultural land, worldwide. High soil erosion severely affects establishment of vegetation via...  相似文献   

Seasonal changes of soil carbon fractions and enzyme activities in response to winter cover crops under long-term rotation and tillage systems     

Jasdeep Singh  Sandeep Kumar 《European Journal of Soil Science》2021,72(2):886-899

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Far infrared irradiation alters total polyphenol,total flavonoid,antioxidant property and quercetin production in tartary buckwheat sprout powder     

Amal Kumar Ghimeray  Pankaja Sharma  Phonesavanh Phoutaxay  Timnoy Salitxay  Sun Hee Woo  Sang Un Park  Cheol Ho Park 《Journal of Cereal Science》2014

The effects of far infrared irradiation (FIR) on total polyphenol (TP), total flavonoid (TF) content, antioxidant properties and aglycone quercetin production in tartary buckwheat sprout (TBS) were investigated. The study showed that FIR treatment decreased the total antioxidant capacity and metal chelating property in TBS in a temperature dependent manner, however, 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity increased with the temperature. Similarly, TP and TF content also increased with temperature. The HPLC result revealed that quercetin production was directly proportional to the temperature, and the maximum production (average 14.8 mg/g dw) of quercetin was at 120 °C which was 13.5 times higher than the untreated control sample of TBS. Overall, this research is expected to be helpful to improve the nutritional value of tartary buckwheat by optimizing the FIR conditions.  相似文献   

Anti-Chikungunya Viral Activities of Aplysiatoxin-Related Compounds from the Marine Cyanobacterium Trichodesmium erythraeum     

Deepak Kumar Gupta  Parveen Kaur  See Ting Leong  Lik Tong Tan  Michèle R. Prinsep  Justin Jang Hann Chu 《Marine drugs》2014,12(1):115-127

Tropical filamentous marine cyanobacteria have emerged as a viable source of novel bioactive natural products for drug discovery and development. In the present study, aplysiatoxin (1), debromoaplysiatoxin (2) and anhydrodebromoaplysiatoxin (3), as well as two new analogues, 3-methoxyaplysiatoxin (4) and 3-methoxydebromoaplysiatoxin (5), are reported for the first time from the marine cyanobacterium Trichodesmium erythraeum. The identification of the bloom-forming cyanobacterial strain was confirmed based on phylogenetic analysis of its 16S rRNA sequences. Structural determination of the new analogues was achieved by extensive NMR spectroscopic analysis and comparison with NMR spectral data of known compounds. In addition, the antiviral activities of these marine toxins were assessed using Chikungunya virus (CHIKV)-infected cells. Post-treatment experiments using the debrominated analogues, namely compounds 2, 3 and 5, displayed dose-dependent inhibition of CHIKV when tested at concentrations ranging from 0.1 µM to 10.0 µM. Furthermore, debromoaplysiatoxin (2) and 3-methoxydebromoaplysiatoxin (5) exhibited significant anti-CHIKV activities with EC₅₀ values of 1.3 μM and 2.7 μM, respectively, and selectivity indices of 10.9 and 9.2, respectively.  相似文献   

Methane production potential and methanogenic archaeal community structure in tropical irrigated Indian paddy soils     

Suresh Kumar Dubey  Alpana Singh  Takeshi Watanabe  Susumu Asakawa  Ankit Singla  Hironori Arai  Kazuyuki Inubushi 《Biology and Fertility of Soils》2014,50(2):369-379

Soil characteristics regulate various belowground microbial processes including methanogenesis and, consequently, affect the structure and function of methanogenic archaeal communities due to change in soil type which in turn influences the CH₄ production potential of soils. Thus, five different soil orders (Alfisol, Entisol, Inceptisol, Podzol and Vertisol) were studied to assess their CH₄ production potential and also the methanogenic archaeal community structure in dryland irrigated Indian paddy soils. Soil incubation experiments revealed CH₄ production to range from 178.4 to 431.2 μg CH₄ g^-1 dws in all soil orders as: Vertisol<Inceptisol<Entisol<Podzol<Alfisol. The numbers of methanogens as quantified using real-time quantitative polymerase chain reaction (qPCR) targeting mcrA genes varied between 0.06 and 72.97 (×10⁶ copies g^-1 dws) and were the highest in Vertisol soil and the least in Alfisol soil. PCR-denaturing gradient gel electrophoresis (DGGE)-based approach targeting 16S rRNA genes revealed diverse methanogenic archaeal communities across all soils. A total of 43 DGGE bands sequenced showed the closely related groups to Methanomicrobiaceae, Methanobacteriaceae, Methanocellales, Methanosarcinaceae, Methanosaetaceae and Crenarchaeota. The composition of methanogenic groups differed among all soils and only the Methanocellales group was common and dominant in all types of soils. The highest diversity of methanogens was found in Inceptisol and Vertisol soils. Methane production potential varied significantly in different soil orders with a positive relationship (p?<?0.05) with methanogens population size, permanganate oxidizable C (POXC) and CO₂ production. The present study suggested that CH₄ production potential of different soils depends on physicochemical properties, methanogenic archaeal community composition and the population size.  相似文献   

Target region amplification polymorphism (TRAP) for assessing genetic diversity and marker-trait associations in chickpea (Cicer arietinum L.) germplasm     

Yogesh Kumar  Soon Jae Kwon  Clarice J. Coyne  Jinguo Hu  Michael A. Grusak  Theodore J. Kisha  Rebecca J. McGee  Ashutosh Sarker 《Genetic Resources and Crop Evolution》2014,61(5):965-977

The effective utilization of crop diversity held in genebanks depends on our knowledge of useful traits and available markers associated with the target traits. Target region amplification polymorphism (TRAP) was used to evaluate the genetic diversity and underlying relationships among 263 accessions of chickpea landraces maintained by the USDA-ARS Western Regional Plant Introduction Station in Pullman, WA, USA. Two-hundred sixty-two TRAP markers were amplified by eight primer combinations. Altogether, 110 (42 %) markers were polymorphic, the other 152 (58 %) displayed no variation. These polymorphic markers revealed important differences among the accessions, with an estimated, mean pair-wise genetic distance of 25.82 %, ranging from 2.8 to 50.0 %. Genetic distance analysis divided the accessions into two major groups, with 113 and 150 accessions each, and substantial association between molecular diversity and geographic origin was evident. Bayesian analysis of population structure revealed two groups (K = 2) with evidence for six sub-groups. Additionally, the population structure of a subset of 110 lines was determined (K = 3) for testing marker-trait associations (MTAs). Phenotypic traits included the concentrations of protein and nine mineral elements in the seeds. Two MTAs were significant (p < 0.01) for concentrations of Ca and K, and three MTAs were significant for Cu and Ni concentrations. The results indicate that this population is useful for genome-wide association studies on other economic traits given the level of genetic diversity uncovered and the marker-trait associations in seed minerals discovered.  相似文献   

Simulations of atmospheric variability induced by sea surface temperatures and implications for global warming     

Kumar A  Leetmaa A  Ji M 《Science (New York, N.Y.)》1994,266(5185):632-634

An atmospheric general circulation model was forced with observed interannual changes in the global sea surface temperatures (SSTs) for the period 1982 to 1993. The simulated seasonal surface air temperature patterns over land areas closely resemble the observed. Over most of the globe, the patterns also resemble those associated with EI Ni?o events and are also reproduced in simulations with weak warm tropical SSTs near the date line. An exception is northern Asia, where the mechanisms for the observed warming are unclear. The results suggest that enhanced air-sea interactions resulting from recent, more persistent warm oceanic conditions in the tropics contributed to the observed global warming trend during this period.  相似文献