Ledebouria hyderabadensis (Hyacinthaceae), a new species from India

Ramana, M. Venkata; Prasanna, P. V.; Venu, P.

doi:10.1007/s12225-012-9363-7

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…The current center of diversity is the Limpopo, Mpumalanga, and KwaZulu-Natal regions of South Africa (Venter, 1993), with a secondary center in East Africa (Lebatha et al, 2006; Lebatha, 2004), both of which may simply reflect a geographic bias in our understanding of Ledebouriinae diversity. For example, throughout the distribution of the Ledebouriinae, studies continue to reveal undescribed diversity within the group (Howard, 2014; Ramana et al, 2012). Taxonomically, the group currently consists of Ledebouria Roth with two sections: Drimiopsis (Lindl.…”

Section: Introductionmentioning

confidence: 99%

Peeling Back the Layers: First Phylogenomic Insights into the Ledebouriinae (Scilloideae, Asparagaceae)

Howard

Crowl

Harvey³

et al. 2020

Preprint

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The Ledebouriinae (Scilloideae, Asparagaceae) are a widespread group of bulbous geophytes found predominantly throughout seasonal climates in sub-Saharan Africa, with a handful of taxa in Madagascar, the Middle East, India and Sri Lanka. An understanding of the phylogenetic relationships within the group have been historically difficult to reconstruct, however. Here, we provide the first phylogenomic perspective into the Ledebouriinae. We use this renewed phylogenetic framework to hypothesize historical factors that have resulted in the topology recovered. Using the Angiosperms353 targeted enrichment probe set, we consistently recovered four major clades (i.e. two Ledebouria clades, Drimiopsis, and Resnova). The two Ledebouria clades closely align with geography, either consisting almost entirely of sub-Saharan African taxa (Ledebouria Clade A), or East African and non-African taxa (Ledebouria Clade B). Our results also suggest that the Ledebouriinae underwent a rapid radiation leading to rampant incomplete lineage sorting.

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Section: Introductionmentioning

confidence: 99%

Peeling Back the Layers: First Phylogenomic Insights into the Ledebouriinae (Scilloideae, Asparagaceae)

Howard

Crowl

Harvey³

et al. 2020

Preprint

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“…The form of the dipole magnetic field around a rotating black hole has been investigated by some authors (e.g. Prasanna 1978; Prasanna & Vishveshwara 1978; Takahashi & Koyama 2009). Applying the assumption of a stationary and axisymmetric field as well as a slowly rotating black hole in their solution, the appropriate form for B S is given by Here, μ is the dipole magnetic moment of the central star, which can be expressed in terms of the surface magnetic field B s and the radius R of the central object as μ= B s R 3 .…”

Section: Formalismmentioning

confidence: 99%

Accreting magnetofluids around a rotating compact object with a dipolar magnetic field

Shaghaghian

2011

Monthly Notices of the Royal Astronomical Society

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The dynamics of an axisymmetric stationary disc of accreting magnetofluid with finite conductivity around a rotating compact object is presented here. Along with the Maxwell equations and the generalized Ohm law, the basic equations governing the motion of a finitely conducting plasma in a curved space–time around a slowly rotating compact object are derived. The finite electrical conductivity is taken into account for the plasma; however, the shear viscous stress is neglected, as well as the self‐gravity of the disc. In this case, energy dissipation occurs only through the finite resistivity. The magnetic stress takes the place of viscous stress in the standard disc model, and extracts angular momentum from the disc. The accreting plasma in the presence of an external dipole magnetic field gives rise to a current in the azimuthal direction. The azimuthal current produced as a result of the motion of the magnetofluid generates the magnetic field for the disc. Magnetic lines of force can penetrate the accretion disc because of the presence of finite resistivity. It has been shown that the dipolar magnetic field structure of the central black hole is modified inside the disc. In fact, the magnetic field lines are pushed outward and are continuous across the disc boundary. It has been demonstrated that the inward flow passing through a sub‐Alfvénic region becomes super‐Alfvénic to fall into the event horizon.

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“…In 2012, Ramana et. al., [7] reported a new taxon, Ledebouria hyderabadensis is recognized as the first collection from the Hyderabad city of Telangana state from India. L. hyderabadensis is being a new plant any kind of earlier reports are not available related to phytochemical analysis and antimicrobial activity and hence, this prompted us to look into its phytochemistry and biological activity.…”

Section: Introductionmentioning

confidence: 99%

Phytochemical screening and antimicrobial activity studies of underground bulbs of Ledeboria hyderabadensis

Veenaa¹,

Sujatha²

2019

J Phytopharmacol

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Plants are good source for the bioactive compounds and are used as traditional medicines. Phytochemical investigation of plants emphasizes in traditional medicines has yielded various bioactive compounds with different pharmacological activities. In the Hyacinthaceae family, Ledebouria genus is the weakly evergreen bulbs. Ledebouria hyderabadensis is a new toxin exist in the Hyderabad city of Telangana state, India. In the present study, we have carried out isolation of homoisoflavone from the underground bulbs of L. hyderabadensis and phytochemical screening of crude extracts of bulbs of L. hyderabadensis. The methanol extract of underground bulbs and isolated compound were screened for antimicrobial activity. Both the methanol extract and isolated compound Scillascillin shows significant antimicrobial activity.

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Ledebouria hyderabadensis (Hyacinthaceae), a new species from India

Cited by 8 publications

References 3 publications

Peeling Back the Layers: First Phylogenomic Insights into the Ledebouriinae (Scilloideae, Asparagaceae)

Peeling Back the Layers: First Phylogenomic Insights into the Ledebouriinae (Scilloideae, Asparagaceae)

Accreting magnetofluids around a rotating compact object with a dipolar magnetic field

Phytochemical screening and antimicrobial activity studies of underground bulbs of Ledeboria hyderabadensis

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