Biology and Impacts of Pacific Island Invasive Species. 4. Verbesina encelioides, Golden Crownbeard (Magnoliopsida: Asteraceae)<sup>1</sup>

Feenstra, Kathleen R; Clements, David R.

doi:10.2984/1534-6188(2008)62[161:baiopi]2.0.co;2

Cited by 25 publications

(19 citation statements)

References 27 publications

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“…We provide here an example of how a plant can play the same role, with equally important consequences for ecosystem function. In bird systems alone, there are multiple examples of plants that deter birds, suggesting that our observations at Palmyra have wide-reaching importance (31,32). However the implications of these results extend far beyond bird-dominated systems.…”

Section: Discussionmentioning

confidence: 47%

Plants cause ecosystem nutrient depletion via the interruption of bird-derived spatial subsidies

Young¹,

McCauley²,

Dunbar

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

109

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Plant introductions and subsequent community shifts are known to affect nutrient cycling, but most such studies have focused on nutrient enrichment effects. The nature of plant-driven nutrient depletions and the mechanisms by which these might occur are relatively poorly understood. In this study we demonstrate that the proliferation of the commonly introduced coconut palm, Cocos nucifera, interrupts the flow of allochthonous marine subsidies to terrestrial ecosystems via an indirect effect: impact on birds. Birds avoid nesting or roosting in C. nucifera, thus reducing the critical nutrient inputs they bring from the marine environment. These decreases in marine subsidies then lead to reductions in available soil nutrients, decreases in leaf nutrient quality, diminished leaf palatability, and reduced herbivory. This nutrient depletion pathway contrasts the more typical patterns of nutrient enrichment that follow plant species introductions. Research on the effects of spatial subsidy disruptions on ecosystems has not yet examined interruptions driven by changes within the recipient community, such as plant community shifts. The ubiquity of coconut palm introductions across the tropics and subtropics makes these observations particularly noteworthy. Equally important, the case of C. nucifera provides a strong demonstration of how plant community changes can dramatically impact the supply of allochthonous nutrients and thereby reshape energy flow in ecosystems.Cocos nucifera | community shifts | indirect effects | seabird | tropical islands

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Section: Discussionmentioning

confidence: 47%

Plants cause ecosystem nutrient depletion via the interruption of bird-derived spatial subsidies

Young¹,

McCauley²,

Dunbar

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

109

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“…f. ex A. Gray (golden crownbeard) have been shown to thrive in both windward and leeward zones (Feenstra & Clements, 2008; DR Clements, unpubl.). This is evidently a plastic response by V. encelioides , with plants growing larger and more branched on the windward side.…”

Section: Plasticity Versus Genetic Changementioning

confidence: 99%

Climate change and weed adaptation: can evolution of invasive plants lead to greater range expansion than forecasted?

2011

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Invasive plants are frequently viewed as harbingers of climate change owing to their potential to cause economic and ecological damage in the process of expanding their ranges. Models are being developed to help predict the range expansion of these plants, based on known tolerance ranges. Success of weeds has often been attributed to an Ôall-purpose genotypeÕ, implying a high level of phenotypic plasticity. However, recent work has shown that many species are capable of relatively rapid genetic change as well, enhancing their ability to invade new areas in response to anthropogenic ecosystem modification. We thus predict that range expansion by many invasive species will exceed that predicted by modelling approaches that do not consider potential evolutionary change. We highlight a number of cases where weeds have expanded their latitudinal ranges or are predicted to do so in response to climatic selection pressures. We also list ten traits as likely targets for natural selection under climate change. The lag phase commonly observed for invasive species may frequently be a result of the time needed for the invader to evolve to fit the new habitat. During this present period of climate change, many invasive plant populations are likely to be in the process of developing adaptations that could lead to exponential population growth in the near future. Thus, assessment of the risk of invasive species owing to changing climate must incorporate evolutionary potential.

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“…Verbesina encelioides (VE) , member of Asteraceae (Sunflower) family, is native to the United States, Mexican Plateau, Europe, and Asia including Saudi Arabia [ 19 ]. It is a notorious weed and an ornamental plant with various bio efficacies like antibacterial, antifungal, antiviral, hypoglycemic and implantation activities [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Verbesina encelioides: cytotoxicity, cell cycle arrest, and oxidative DNA damage in human liver cancer (HepG2) cell line

Al-Oqail

Siddiqui

Al-Sheddi

et al. 2016

BMC Complement Altern Med

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BackgroundCancer is a major health problem and exploiting natural products have been one of the most successful methods to combat this disease. Verbesina encelioides is a notorious weed with various pharmacological properties.The aim of the present investigation was to screen the anticancer potential of V. encelioides extract against human lung cancer (A-549), breast cancer (MCF-7), and liver cancer (HepG2) cell lines.MethodsA-549, MCF-7, and HepG2 cells were exposed to various concentrations of (10–1000 μg/ml) of V. encelioides for 24 h. Further, cytotoxic concentrations (250, 500, and 1000 μg/ml) of V. encelioides induced oxidative stress (GSH and LPO), reactive oxygen species (ROS) generation, mitochondrial membrane potential (MMP), cell cycle arrest, and DNA damage in HepG2 cells were studied.ResultsThe exposure of cells to 10–1000 μg/ml of extract for 24 h, revealed the concentrations 250–1000 μg/ml was cytotoxic against MCF-7 and HepG2 cells, but not against A-549 cells. Moreover, the extract showed higher decrease in the cell viability against HepG2 cells than MCF-7 cells. Therefore, HepG2 cells were selected for further studies viz. oxidative stress (GSH and LPO), reactive oxygen species (ROS) generation, mitochondrial membrane potential (MMP), cell cycle arrest, and DNA damage. The results revealed differential anticancer activity of V. encelioides against A-549, MCF-7 and HepG2 cells. A significant induction of oxidative stress, ROS generation, and MMP levels was observed in HepG2 cells. The cell cycle analysis and comet assay showed that V. encelioides significantly induced G2/M arrests and DNA damage.ConclusionThese results indicate that V. encelioides possess substantial cytotoxic potential and may warrant further investigation to develop potential anticancer agent.Electronic supplementary materialThe online version of this article (doi:10.1186/s12906-016-1106-0) contains supplementary material, which is available to authorized users.

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Biology and Impacts of Pacific Island Invasive Species. 4. Verbesina encelioides, Golden Crownbeard (Magnoliopsida: Asteraceae)¹

Cited by 25 publications

References 27 publications

Plants cause ecosystem nutrient depletion via the interruption of bird-derived spatial subsidies

Plants cause ecosystem nutrient depletion via the interruption of bird-derived spatial subsidies

Climate change and weed adaptation: can evolution of invasive plants lead to greater range expansion than forecasted?

Verbesina encelioides: cytotoxicity, cell cycle arrest, and oxidative DNA damage in human liver cancer (HepG2) cell line

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Biology and Impacts of Pacific Island Invasive Species. 4. Verbesina encelioides, Golden Crownbeard (Magnoliopsida: Asteraceae)1

Cited by 25 publications

References 27 publications

Plants cause ecosystem nutrient depletion via the interruption of bird-derived spatial subsidies

Plants cause ecosystem nutrient depletion via the interruption of bird-derived spatial subsidies

Climate change and weed adaptation: can evolution of invasive plants lead to greater range expansion than forecasted?

Verbesina encelioides: cytotoxicity, cell cycle arrest, and oxidative DNA damage in human liver cancer (HepG2) cell line

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Biology and Impacts of Pacific Island Invasive Species. 4. Verbesina encelioides, Golden Crownbeard (Magnoliopsida: Asteraceae)¹