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Kumar, Pawan

Phytoecdysteroid Profiling of Silene vulgaris by UPLC-ESI-MS

Abstract Views :209 | PDF Views:72

Authors

Jasmeen Sidana ¹, Renuka Devi ¹, Pawan Kumar ¹, Bikram Singh ¹, Om P. Sharma ¹

Affiliations
1 Natural Products Chemistry and Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur 176 061, IN

Source

Current Science, Vol 113, No 10 (2017), Pagination: 1986-1992

Abstract

Silene vulgaris is a wild edible plant consumed in both raw as well as cooked forms in several parts of Europe. The phytoconstituents of Silene species include phytoecdysteroids, triterpenoidal saponins, terpenoids, flavonoids and phenolics. Silene vulgaris is a relatively unexplored species and the chemical profiling of this plant has not been attempted so far. Hence the UPLC-ESI-MS approach was applied to the extracts of flowers, leaves and ischolar_mains of S. vulgaris for the profiling of phytoecdysteroids. The relative distribution of these compounds varied between flowers and leaves; however, the qualitative composition was similar. Only traces of phytoecdysteroids were present in the ischolar_mains. The aglycones, sugars and other moieties were determined on the basis of ESI-MS. A total of eight previously known phytoecdysteroids were identified. Partial characterization of eight other phytoecdysteroids was also attempted.

Keywords

Chemical Profiling, Chromatographic Analysis, Phytoecdysteroids, Silene vulgaris.

Full Text

References

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Soil and Water Conservation Techniques Based Land Degradation Neutrality: A Need-Based Solution for Degraded Lands in Indian Perspective

Abstract Views :178 | PDF Views:71

Authors

Anand K. Gupta ¹, Pawan Kumar ¹, A. C. Rathore ¹, Parmanand Kumar ², Rajesh Kaushal ¹, Sadikul Islam ³, Devi Deen Yadav ⁴, D. K. Jigyasu ⁵, H. Mehta ¹

Affiliations
1 Plant Science Division, ICAR-Indian Institute of Soil and Water Conservation, Dehradun 248 195, IN
2 Forest Research Institute, Chakarata Road, Dehradun 248 001, IN
3 Hydrology and Engineering Division, ICAR-Indian Institute of Soil and Water Conservation, Dehradun 248 195, IN
4 Soil Science and Agronomy Division, ICAR-Indian Institute of Soil and Water Conservation, Dehradun 248 195, IN
5 Central Muga Eri Research and Training Institute, Jorhat 785 700, IN

Source

Current Science, Vol 121, No 10 (2021), Pagination: 1343-1347

Abstract

Land degradation neutrality (LDN) adopted in 2015 as target 15.3 of sustainable development goals (SDGs), is a challenge as well as opportunity in the present world to restore the degraded lands. Soil and water conservation (SWC) techniques in the form of bio-engineering measures have vast potential to attain LDN in sustainable manner. India has already announced a LDN target of 26 mha and is fully determined to meet the target by 2030. Therefore, this article proposes and recommends incorporation of SWC measures in effective ways at policy level as key to the success of LDN

Keywords

Degraded Land Restoration, Ecosystem Services, LDN, SDGs, SWC Techniques.

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Trilobozoan (Tribrachidium and Albumares) Ediacaran Organisms from Marwar Supergroup, Western India

Abstract Views :96 | PDF Views:65

Authors

V. S. Parihar ¹, Hukmaram ¹, Pawan Kumar ¹, Anshul Harsh ¹

Affiliations
1 Department of Geology, Jai Narain Vyas University, Jodhpur 342 005, IN

Source

Current Science, Vol 124, No 4 (2023), Pagination: 485-490

Abstract

Here we describe the Tribrachidium and Albumares Ediacaran organisms belonging to phylum Trilobozoa in the Sonia Sandstone of Marwar Supergroup, western India. Between the two Ediacaran genera, Albumares brunsae was the first to be discovered in India, while Tribrachidium heraldicum was the first record from the Marwar Supergroup. T. heraldicum is soft-bodied, discoidal or disc-shaped (in plane view) and slightly conical-shaped (when found with up to 2 mm vertical relief) with three elevated lobes (arms) or ridges bounded by a well-defined peripheral ring. A. brunsae is soft-bodied, flattened, low-relief, circular to sub-circular and with a tri-lobed (three elevated arms/rays) shield having branching rays that radiate outward from the centre to the outer edge of the peripheral ring. Both Ediacaran taxa occur here as convex or positive reliefs with triradial symmetry on medium to fine-grained sandstone bedding planes in the Sursagar area and show the Flinders Ranges style of preservation.

Keywords

Albumares, Ediacaran Organisms, Sandstone, Tribrachidium, Trilobozoans.

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Triangular-Shaped Ediacaran Fossil Thectardis Avalonensis From the Sonia Sandstone, Jodhpur Group, Marwar Supergroup, Western India

Abstract Views :86 | PDF Views:47

Authors

V. S. Parihar ¹, Hukmaram ¹, Pawan Kumar ¹, Anshul Harsh ¹

Affiliations
1 Department of Geology, Jai Narain Vyas University, Jodhpur 342 005, India., IN

Source

Current Science, Vol 124, No 9 (2023), Pagination: 1095-1100

Abstract

The present study records the triangular-shaped Ediacaran fossil identified as Thectardis avalonensis from the Sonia Sandstone of Jodhpur Group, Marwar Supergroup, western India. These Ediacaran fossil specimens are preserved in convex (positive) relief, but one is in negative relief on the bedding planes of sandstone in the Sursagar mines area. T. avalonensis is well-preserved, unskeletonized, elongated and triangular in shape, with sharp, raised marginal rims or ridges that widen at the triangular base and taper towards the apex of the organism. This Ediacaran triangular-shaped T. avalonensis organism is recorded for the first time from India. The phylogenetic affinity of T. avalonensis is still uncertain, as some have interpreted it as a sponge based on a body plan consistent with the hydrodynamics of the sponge water-canal system, which lacked a mouth or movement and its length–width ratio of more than 1.6. As well as these, T. avalonensis may also belong to Diskagma-like lichen or living Cladonia-like lichen group and the Auroralumina-like cnidarian organisms of the Ediacaran crown group.

Keywords

Eukaryotic Organism, Fossil Specimens, Length– Width Ratio, Phylogenetic Affinity, Sandstone, Thectardis Avalonensis.

Full Text

References

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Nimbia: The Discoid Organisms from Ediacaran Sonia Sandstone of Jodhpur Group, Marwar Supergroup, Western India

Abstract Views :47 | PDF Views:25

Authors

Hukmaram ¹, Anshul Harsh ¹, Pawan Kumar ¹, V. S. Parihar ¹

Affiliations
1 Department of Geology, Jai Narain Vyas University, Jodhpur 342 005, IN

Source

Current Science, Vol 125, No 9 (2023), Pagination: 999-1004

Abstract

In this study, we report well-preserved fossil remains of Nimbia from the Ediacaran Sonia Sandstone of Jodhpur Group, Marwar Supergroup in the Sursagar area of Jodhpur district, Rajasthan, western India. Here, two species of Nimbia, namely Nimbia occlusa and Nimbia dniesteri, have been recorded on medium- to fine-grained sandstone bedding surfaces. The N. occlusa forms are circular to ovate and elliptical imprints with a smooth and flat central part and enclosed by a single thick, annular marginal rim, whereas the N. dniesteri remains are circular to sub-circular discoid impressions with a trapezoidal structure. Here, the recorded N. occlusa is common compared to the N. dniesteri fossil forms in the Ediacaran Sonia Sandstone. These Nimbia fossil forms are found in the Sonia Sandstone in terrestrial to marginal marine habitats with moderate hydrodynamic forces.

Keywords

Discoid Organisms, Fossil Remains, Hydrodynamic Forces, Nimbia Species.

Full Text

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