Chromosomal studies of three species of <i>Bidens</i> (L.) (Asteraceae)

Tereza, Grombone-Guaratini Maria; Mansanares, Mariana Esteves; Semir, João; Solferini, Vera Nisaka

doi:10.1080/00087114.2006.10797892

Cited by 13 publications

(4 citation statements)

References 13 publications

(15 reference statements)

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“…Following, materials were stained with leuco-basic fuchsin in the dark at room temperature for 2 h and treated with 1 % pectinase at room temperature for 1 h to separate the connected cells. Root-tips were spread on a slide and squashed in a drop of 45 % acetic acid and then observed under a microscope (Grombone-Guaratini et al 2006). Totally, 16 cells of var.…”

Section: Methodsmentioning

confidence: 99%

Chromosome numbers of populations of three varieties of Bidens pilosa in Taiwan

Huang

Kao

2015

Bot Stud

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BackgroundHairy beggar-ticks (Bidens pilosa L.) is a common invasive plant in tropical and subtropical regions. The Flora of Taiwan listed three varieties of B. pilosa in Taiwan, var. minor, var. pilosa and var. radiata. Among the three varieties, var. radiata was the most recently, in 1970s, introduced into Taiwan. However, after its introduction into Taiwan, var. radiata has become dominant over the other two varieties and is considered a serious invasive plant in lowland of Taiwan. Our previous study showed that var. radiata is self-incompatible and the other two varieties are self-fertile. Could it be possible that different chromosome numbers contribute to the different breeding systems of these three varieties? In addition, the heterogeneities of traits of var. radiata were found higher than those of var. minor and var. pilosa. Is the phenomenon resulting from the hybridization between var. radiata with other varieties? We counted chromosome numbers of populations of these three varieties distributed in Taiwan and conducted hand pollination treatment between var. radiata (as pollen receiver) and var. minor or var. pilosa (as pollen donor) to provide answer for the aforementioned questions.ResultsNo difference was found in chromosome numbers among populations of the same variety. Forty-eight chromosomes (2n = 48) were counted for var. radiata while 72 (2n = 72) chromosomes for var. minor and var. pilosa. Therefore, var. radiata is tetraploid and var. minor and var. pilosa are hexaploid. No successful hybridization was found between var. radiata and var. minor or between var. radiata and var. pilosa.ConclusionsThis study provided the evidence that the invasive plant (B. pilosa var. radiata) has different chromosome numbers from the other two varieties and is unlikely to hybridize with the other two varieties.

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Section: Methodsmentioning

confidence: 99%

Chromosome numbers of populations of three varieties of Bidens pilosa in Taiwan

Huang

Kao

2015

Bot Stud

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“…Plants constitute a vital part of the world’s primary health care [ 1 ]. Bidens pilosa , an underutilized plant species is a member of the Asteraceae family [ 2 , 3 ] widely distributed around the world [ 4 ]. It is rich in phenolic compounds that are of great medical significance [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

The effect of temperature and methanol–water mixture on pressurized hot water extraction (PHWE) of anti-HIV analogoues from Bidens pilosa

Gbashi

Njobeh

Steenkamp

et al. 2016

Chemistry Central Journal

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BackgroundPressurized hot water extraction (PHWE) technique has recently gain much attention for the extraction of biologically active compounds from plant tissues for analytical purposes, due to the limited use of organic solvents, its cost-effectiveness, ease-of-use and efficiency. An increase in temperature results in higher yields, however, issues with degradation of some metabolites (e.g. tartrate esters) when PHWE is conditioned at elevated temperatures has greatly limited its use. In this study, we considered possibilities of optimizing PHWE of some specific functional metabolites from Bidens pilosa using solvent compositions of 0, 20, 40 and 60 % methanol and a temperature profile of 50, 100 and 150 °C.ResultsThe extracts obtained were analyzed using UPLC-qTOF-MS/MS and the results showed that both temperature and solvent composition were critical for efficient recovery of target metabolites, i.e., dicaffeoylquinic acid (diCQA) and chicoric acid (CA), which are known to possess anti-HIV properties. It was also possible to extract different isomers (possibly cis-geometrical isomers) of these molecules. Significantly differential (p ≤ 0.05) recovery patterns corresponding to the extraction conditions were observed as recovery increased with increase in methanol composition as well as temperature. The major compounds recovered in descending order were 3,5-diCQA with relative peak intensity of 204.23 ± 3.16 extracted at 50 °C and 60 % methanol; chicoric acid (141.00 ± 3.55) at 50 °C and 60 % methanol; 4,5-diCQA (108.05 ± 4.76) at 150 °C and 0 % methanol; 3,4-diCQA (53.04 ± 13.49) at 150 °C and 0 % methanol; chicoric acid isomer (40.01 ± 1.14) at 150 °C and 20 % methanol; and cis-3,5-diCQA (12.07 ± 5.54) at 100 °C and 60 % methanol. Fitting the central composite design response surface model to our data generated models that fit the data well with R2 values ranging from 0.57 to 0.87. Accordingly, it was possible to observe on the response surface plots the effects of temperature and solvent composition on the recovery patterns of these metabolites as well as to establish the optimum extraction conditions. Furthermore, the pareto charts revealed that methanol composition had a stronger effect on extraction yield than temperature.ConclusionUsing methanol as a co-solvent resulted in significantly higher (p ≤ 0.05) even at temperatures as low as 50 °C, thus undermining the limitation of thermal degradation at higher temperatures during PHWE.

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“…Pappus, 1-3 mm long, composed of 3-5 awns, retorsely barbed. Chromosome number n = 36 (Ballard 1986;Tereza et al 2006…”

Section: Bidens Lmentioning

confidence: 99%

Bidens L. (Coreopsideae, Asteraceae), a new generic record for Abu Dhabi, United Arab Emirates

Sakkir¹,

Thazhe²,

Mansoori³

et al. 2021

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We report a collection of Bidens pilosa L. from an urban habitat in Abu Dhabi. This represents a new generic record of Bidens L. for the emirate. The species has most likely been accidentally introduced and has the potential to affect the native flora because of its fast rate of growth. The new record expands the geographic distribution of the species and highlights the importance of expanding surveys to include urban habitats, which would help track the spread of non-native species within the emirate.

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Chromosomal studies of three species of Bidens (L.) (Asteraceae)

Cited by 13 publications

References 13 publications

Chromosome numbers of populations of three varieties of Bidens pilosa in Taiwan

Chromosome numbers of populations of three varieties of Bidens pilosa in Taiwan

The effect of temperature and methanol–water mixture on pressurized hot water extraction (PHWE) of anti-HIV analogoues from Bidens pilosa

Bidens L. (Coreopsideae, Asteraceae), a new generic record for Abu Dhabi, United Arab Emirates

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