Floral ecology, breeding system and pollination in <i>Antigonon leptopus</i> L. (Polygonaceae)

Raju, A. J. S.; Raju, Vinod K; Platon, Victor; Naidu, S. Appala

doi:10.1046/j.1442-1984.2001.00060.x

Cited by 32 publications

(26 citation statements)

References 10 publications

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“…The C. polygonoides cross pollinates (anemophily) (Raju et al 2001) which might lead to high variations at chemical as well as molecular levels, not withstanding the fact that the populations of the species under study are located at tens to hundreds of kilometers of distance. Predominantly obligate out breeding behavior of C. polygonoides beside certain non-comprehensible reasons prompted these accessions to spread and occupy specific geographical niches thereby enhancing their adaptational capabilities vis-à-vis native climatic conditions.…”

Section: Discussionmentioning

confidence: 99%

Chemical and genetic diversity among some wild stands of Calligonum polygonoides (Polygonaceae) from the Thar Desert of Rajasthan

Vyas

Kumar

Sharma

et al. 2012

RBT

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Abstract:The arid Western Rajasthan, where the Thar Desert of India is immersed, is mostly covered by sand dunes, a common landscape. The region has confronted with fragilities of natural resources, low, erratic and ill-distributed rainfall, and is covered up with many perennial hardy shrubs. Calligonum polygonoides, the most common perennial shrub, is widely present in some localities of this Thar Desert. In this study, we evaluated the diversity present among 54 wild Calligonum polygonoides plants, sampled from eight different locations within the Thar Desert. Our methods included chemical/nutritional characteristics and random amplified polymorphic DNA (RAPD). Both chemical and molecular methods produced wider range of diversity, however, RAPD detected comparatively more diversity. A total of 163 band positions were produced by ten RAPD primers, of which 147 were found polymorphic with 90.18% polymorphism. RAPD-based Jaccard's similarity coefficients ranged from 0.43-0.89. The analysis of various chemical and mineral constituents revealed that phog is an excellent source of calcium, potassium and phosphorous while relatively poor in zinc. Among minerals, average potassium content was found maximum (2 430mg/100g) with 0.14 CV. Zinc was observed comparably less in quantity while highest variable with CV 0.73. The chemical-based Manhattan dissimilarity coefficient values ranged from 0.01-0.22 with an average of 0.12. The comparison of the clusters obtained based on the chemical and mineral parameters with those of the RAPD data showed that the groups formed in both cases showed different patterns of relationships among the samples. Broader range of diversity might be due to the out breeding behavior of C. polygonoides and indicates the good adaptability of the plants in the region studied. However, low diversity observed in the Bikaner province is alarming and suggests that anthropogenic activities leading to heavy population disturbances can affect the genetic composition of the species in a considerable way. Rev.

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Section: Discussionmentioning

confidence: 99%

Chemical and genetic diversity among some wild stands of Calligonum polygonoides (Polygonaceae) from the Thar Desert of Rajasthan

Vyas

Kumar

Sharma

et al. 2012

RBT

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“…The botanical species on which the present work is based À Antigonon leptopus À is an invasive which has been a source of great harm to forests and agricultural lands besides contributing in other ways to environmental pollution and global warming. [33] Over the years, millions of dollars worth of monies have been spent across the world to destroy or control this weed, but it continues to thrive. Hence, the present work, on the utilisation of this weed in BNP synthesis, provides us with a substrate which has no competing use.…”

Section: Introductionmentioning

confidence: 99%

Rapid and green synthesis of bimetallic Au–Ag nanoparticles using an otherwise worthless weedAntigonon leptopus

Ganaie

Abbasi

2015

Journal of Experimental Nanoscience

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We demonstrate a simple, straightforward, clean-green, single pot approach for the synthesis of bimetallic Ag/Au nanoparticles (BNPs) by using a highly invasive terrestrial weed coral vine (Antigonon leptopus). Aqueous extracts of the weed were found to reduce the metal ions to form nanosised aggregates and then stabilise them by preventing further aggregation. The efficacy of the extracts of all its parts was explored by varying the stoichiometry of reactants, temperature, pH and reaction time. The electron micrographs of the synthesised BNPs indicated the presence of particles of predominantly spherical shapes in sizes ranging from 10 to 60 nm. The presence of gold and silver atoms was confirmed from the energy dispersive X-ray, X-ray photoelectron and X-ray diffraction studies. The Fourier transform infra-red spectroscopic spectral study indicated that the phenolics (including flavonoids) and proteins contained in the plant extract could have been responsible for the formation and stabilisation of the BNPs.

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“…After conducting a year-long study on the phenology of corallita on St. Eustatius, Ernst and Ketner (2007) failed to identify a distinct flowering season, likely due to the lack of a dry season. In tropical climates, this species usually flowers year-round (Raju et al 2001), whereas in more temperate regions (Arizona, Texas), the foliage senesces during the winter months (Scheper 2004).…”

Section: Natural History Taxonomy and Distributionmentioning

confidence: 99%

Corallita (Antigonon leptopus): Intentional Introduction of a Plant with Documented Invasive Capability

Burke

DiTommaso

2011

Invasive plant sci. manag.

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Corallita (Antigonon leptopus) is a perennial vine, lauded as an ornamental for its vigorous growth, and plentiful (usually) pink flowers, and even its ability to smother unsightly landscapes. In the United States it thrives in horticultural zones 8 to 10, and also is successfully grown worldwide in tropical climates. When corallita is neglected, it can grow quickly over other vegetation, spreading beyond its area of introduction. Once established, it is difficult to eradicate because it produces many tuberous roots that can propagate vegetatively. Its fruits are buoyant, allowing for successful seed dispersal in water. The islands of Guam (South Pacific Ocean) and St. Eustatius (Caribbean Sea) represent two regions where corallita has become so pervasive that it threatens local diversity. In Florida, already it is classified as a Category II invasive. Our report reviews the literature and past studies of corallita, in addition to adding new taxonomic and distribution information from herbarium specimens to clarify the identity and geographic range. It is recommended that introductions of this plant by the horticultural industry in both tropical and temperate regions be closely monitored to prevent spread. On tropical island nations, we advise against any new introductions.

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Floral ecology, breeding system and pollination in Antigonon leptopus L. (Polygonaceae)

Cited by 32 publications

References 10 publications

Chemical and genetic diversity among some wild stands of Calligonum polygonoides (Polygonaceae) from the Thar Desert of Rajasthan

Chemical and genetic diversity among some wild stands of Calligonum polygonoides (Polygonaceae) from the Thar Desert of Rajasthan

Rapid and green synthesis of bimetallic Au–Ag nanoparticles using an otherwise worthless weedAntigonon leptopus

Corallita (Antigonon leptopus): Intentional Introduction of a Plant with Documented Invasive Capability

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