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35 results on '"Rathee, Sonia"'

4. Natural Language-Based Naive Bayes Classifier Model for Sentence Classification

Author

Yadav, Amita, Rathee, Sonia, Shalu, Zafar, Sherin, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Gupta, Deepak, editor, Khanna, Ashish, editor, Bhattacharyya, Siddhartha, editor, Hassanien, Aboul Ella, editor, Anand, Sameer, editor, and Jaiswal, Ajay, editor

Published
2023
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18. The role of floral traits in community assembly processes at high elevations in the Himalayas

Author

Ahmad, Mustaqeem, Rosbakh, Sergey, Bucher, Solveig Franziska, Sharma, Padma, Rathee, Sonia, Uniyal, Sanjay Kr, Batish, Daizy R., Singh, Harminder P., Ahmad, Mustaqeem, Rosbakh, Sergey, Bucher, Solveig Franziska, Sharma, Padma, Rathee, Sonia, Uniyal, Sanjay Kr, Batish, Daizy R., and Singh, Harminder P.

Abstract

There is a common agreement that, to maximise our understanding of trait-based community assembly, traits related to different organs should be considered as they relate to different ecological niche axes. Floral traits, in particular, have been suggested to play an important role in the plant community assembly along with environmental gradients as they determine reproductive success, one of the key functions in plants. However, the role of floral traits in community assembly research remains largely unverified empirically. Using a large and novel dataset on plant traits and plant communities, we analysed the variability of six floral traits of 139 herbaceous species in 21 sites located along an elevation gradient (2000–4000 m) in the western Himalayas. The variability of floral traits along the gradient was analysed using community-weighted mean (CWM) trait values and functional diversities (FDs) calculated for each study community. The CWMs showed that with increasing elevation, flowering began later, and flowers tended to be larger with decreasing specific flower area (SFA). Along with the convergence in the onset of flowering and SFA (i.e. lower FD at high-elevation sites), these patterns suggest that abiotic filtering and plant–pollinator interactions could affect the floral trait composition of the communities. Most likely, increasing low-temperature stress towards high-elevation sites selected for late-flowering species that produce flowers with larger display areas. The low abundance and activity of pollinators at high elevation could also explain why these traits were selected in the communities studied. Delayed flowering with increasing elevation might facilitate the phenological overlap of plants and their pollinators, as pollinator activity at higher elevation peaks in the second half of the vegetation period. The dominance of a species with low SFA and larger display area in high-altitude communities could be attributable to increased flower longevi

Published
2023

19. Comparison of synthetic and organic biodegradable chelants in augmenting cadmium phytoextraction in Solanum nigrum.

Author

Sharma, Padma, Rathee, Sonia, Ahmad, Mustaqeem, Raina, Riya, Batish, Daizy R., and Singh, Harminder P.

Subjects
*SOLANUM nigrum, *PHYTOREMEDIATION, *HYPERACCUMULATOR plants, *ETHYLENE glycol, *CADMIUM, *NITRILOTRIACETIC acid
Abstract

This study focused to enhance the cadmium (Cd) phytoextraction efficiency in Solanum nigrum by applying four biodegradable chelants (10 mM)-ethylene glycol tetraacetic acid (EGTA), ethylenediamine disuccinate (EDDS), nitrilotriacetic acid (NTA), and citric acid (CA), when grown in Cd-spiked soil (12 and 48 mg kg−1). Plant height, dry biomass, photosynthetic traits, and metal accumulation varied significantly with Cd and chelant treatments. Cadmium-toxicity resulted in reduction of plant growth and photosynthetic physiology, whereas chelant supplementation alleviated the toxic effect of Cd and increased its accumulation. Tolerance index value increased with addition of chelants in the order: EGTA (1.57–1.63) >EDDS (1.39–1.58) >NTA (1.14–1.50) >CA (1–1.22) compared with Cd (0.46–1.08). Transfer coefficient of root increased with supplementation of EGTA (3.40–3.85), EDDS (3.10–3.40), NTA (2.60–2.90), and CA (1.85–2.29), over Cd-alone (1.61–1.63). Similarly, translocation factor was also increased upon addition of EGTA (0.52–0.73), EDDS (0.35–0.81), NTA (0.38–0.75), and CA (0.53–0.54), compared with Cd-alone (0.36–0.59). Maximum Cd removal (67.67% at Cd12 and 36.05% at Cd48) was observed with supplementation of EGTA. The study concludes that the supplementation of EGTA and EDDS with S. nigrum can be employed as an efficient and environmentally safe technique for reclamation of Cd-contaminated soils. Apart from the selection of a good hyperaccumulator, the choice of chelant (biodegradable/non-biodegradable) is an important aspect for the successful phytoextraction of metals from contaminated soil. We reported for the first time the potential of ethylene glycol tetraacetic acid (EGTA; a biodegradable chelant) in enhancing Cd phytoextraction by Solanum nigrum. Comparative appraisal of metal extraction efficiency of biodegradable chelants at low (12 mg kg−1) and high (48 mg kg−1) Cd dose depicted that EGTA performed better than EDDS, NTA, and CA (other biodegradable chelants). EGTA supplementation did not induce toxicity in plants; rather it improved metal accumulation, morphology, and photosynthetic physiology. [ABSTRACT FROM AUTHOR]

Published
2023
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33. Chemical Composition and Potential of Eucalyptus camaldulensisDehnh. Essential Oil and Its Major Components as Anti-inflammatory and Anti-leishmanial Agent

Author

Grewal, Kamaljit, Joshi, Jyoti, Rathee, Sonia, Kaur, Sukhbir, Singh, Harminder Pal, and Batish, Daizy R.

Abstract

AbstractThe present study evaluated cytotoxic, anti-inflammatory, and anti-leishmanial properties of essential oil (EO) from fresh foliage of Eucalyptus camaldulensisDehnh., and its major constituent compounds− 1,8-cineole, β-pinene and α-pinene. The chromatographic analysis of the hydrodistilled EO using gas chromatography-mass spectrometry (GC/MS) revealed the presence of 25 compounds which constituted 99.45% of EO. The EO comprised of 36% monoterpenoid hydrocarbons and 22.3% oxygenated monoterpenes. The most abundant constituent was 1,8-cineole (17.1%) followed by β-pinene (16.5%). In addition, significant quantities of β-eudesmol (10.9%), limonene (9.5%), and α-pinene (7.9%) were observed. Cell cytotoxicity concentration was observed to be highest in 1,8-cineole (CC50> 640 µg/mL), followed by α-pinene (CC50> 320 µg/mL), β-pinene (CC50> 160 µg/mL) and EO (CC50> 20 µg/mL). Investigation of anti-inflammatory potential by carrageenan-induced rat paw edema model revealed maximum inhibition in α-pinene (85.6% at 500 mg/kg body wt. and 81% at 250 mg/kg body wt.) after 3 h, which was comparable to indomethacin (positive control). Among the EO and its components, β-pinene exhibited maximum anti-leishmanial potential with IC50of 2.57 ± 0.15 mL. The study concluded that E. camaldulensisEO possesses significant anti-inflammatory and anti-leishmanial activity, thus suggesting the use of EO and its major constituents as a green drug that is a safer alternative to synthetic compounds.

Published
2022
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34. Salicylic acid pre-treatment modulates Pb2+-induced DNA damage vis-à-vis oxidative stress in Allium cepa roots.

Author

Kaur, Gurpreet, Sharma, Padma, Rathee, Sonia, Singh, Harminder Pal, Batish, Daizy Rani, and Kohli, Ravinder Kumar

Subjects
ONIONS, DNA damage, OXIDATIVE stress, NUCLEAR membranes, GLUTATHIONE, PHYTOCHELATINS, SALICYLIC acid
Abstract

The current study investigated the putative role of salicylic acid (SA) in modulating Pb2+-induced DNA and oxidative damage in Allium cepa roots. Pb2+ exposure enhanced free radical generation and reduced DNA integrity and antioxidant machinery after 24 h; however, SA pre-treatment (for 24 h) ameliorated Pb2+ toxicity. Pb2+ exposure led to an increase in malondialdehyde (MDA) and hydrogen peroxide (H2O2) accumulation and enhanced superoxide radical and hydroxyl radical levels. SA improved the efficiency of enzymatic antioxidants (ascorbate and guaiacol peroxidases [APX, GPX], superoxide dismutases [SOD], and catalases [CAT]) at 50-μM Pb2+ concentration. However, SA pre-treatment could not improve the efficiency of CAT and APX at 500 μM of Pb2+ treatment. Elevated levels of ascorbate and glutathione were observed in A. cepa roots pre-treated with SA and exposed to 50 μM Pb2+ treatment, except for oxidized glutathione. Nuclear membrane integrity test demonstrated the ameliorating effect of SA by reducing the number of dark blue–stained nuclei as compared to Pb2+ alone treatments. SA was successful in reducing DNA damage in cell exposed to higher concentration of Pb2+ (500 μM) as observed through comet assay. The study concludes that SA played a major role in enhancing defense mechanism and protecting against DNA damage by acclimatizing the plant to Pb2+-induced toxicity. [ABSTRACT FROM AUTHOR]

Published
2021
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