The growth response of Alternanthera philoxeroides in a simulated post-combustion emission with ultrahigh [CO2] and acidic pollutants

Xu, Cheng‐Yuan; Griffin, Kevin L.; Blazier, John C.; Craig, E. C.; Gilbert, Dominique; Sritrairat, S.; Anderson, O. Roger; Castaldi, Marco J.; Beaumont, Larry

doi:10.1016/j.envpol.2009.02.013

Cited by 7 publications

(2 citation statements)

References 40 publications

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“…Alternanthera philoxeroides and P. canescens had high N concentrations (> 50 mg N g −1 ) in leaf tissue (Fig. 2c,d), as regularly observed in these two species cultured under glasshouse condition with adequate nutrient supply (Xu et al. 2009; C.‐Y.…”

Section: Resultssupporting

confidence: 74%

Effects of clonal integration and light availability on the growth and physiology of two invasive herbs

Xu¹,

Schooler

Klinken

2010

Journal of Ecology

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Summary1. Clonal plants benefit from the ability to translocate resources among interconnected ramets to colonize heterogeneous habitats. Clonal integration affects the resource level and morphological traits of ramets, and thus may influence their physiology and general performance. Although leaf gas exchange and its associated physiological adjustments are key traits to assess plant fitness, the effect of clonal integration on these functional traits is insufficiently understood. 2. In a glasshouse experiment, we addressed how clonal integration affects gas exchange properties, leaf characters and growth of ramets in two invasive plants, Alternanthera philoxeroides and Phyla canescens, under full sun and 85% shade. We also used stable-isotope labelling to assess the maternal subsidy to daughter ramets. 3. Similar effects of connection were observed in both species for most gas exchange parameters and leaf characters. Clonal integration did not affect photosynthetic capacity and respiratory rates of ramets. When grown in shade, ramets connected with an unshaded mother plant displayed higher area-based leaf nitrogen and chlorophyll content than severed ramets, but the additional nitrogen and chlorophyll was not translated to increased photosynthetic capability. Overall, severed ramets displayed significant light response for leaf nitrogen (area-based), photosynthetic nitrogen use efficiency, chlorophyll to nitrogen ratio, and nitrogen stable-isotope signature, but the light response was eliminated by clonal integration in connected ramets. 4. Both species displayed substantial maternal carbohydrate subsidy that benefited the growth of daughter ramets, but species-specific patterns were observed in the growth of daughter ramets and the amount of subsidy. The amount of subsidy was independent of ramet growth light levels for P. canescens, but shaded, connected ramets of A. philoxeroides received more subsidy than unshaded controls, facilitating a larger growth improvement relative to severed counterparts than P. canescens. 5. Synthesis. We observed increased leaf nitrogen and chlorophyll in shaded, connected ramets of two clonal invasive plants. Clonal integration may facilitate nitrogen assimilation and allow preacclimation to high-light conditions for shaded, connected ramets, thus promoting the opportunistic expansion of these invaders on site scale. The species-specific maternal subsidy pattern demonstrated that clonal plants possess different strategies to subsidize ramets under light-limited conditions.

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Section: Resultssupporting

confidence: 74%

Effects of clonal integration and light availability on the growth and physiology of two invasive herbs

Xu¹,

Schooler

Klinken

2010

Journal of Ecology

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“…In a more recent study conducted on alligator weed ( Alternanthera philoxeroides ) it was shown that exposing plants to NO 2 (0.8–3.1 ppm) and SO 2 (0.09–0.35 ppm) emission scenarios designed to represent post‐combustion flue gases, alongside concurrent ultrahigh CO 2 concentrations (2000–5000 ppm), could partially compensate for the negative effects of the acidic pollutants and result in increased absorbance of excess CO 2 and higher yields (Xu et al . ). Taken together, these examples underline the major challenges in developing a full understanding of plant defence mechanisms in the natural environment.…”

Section: Plant Physiological and Molecular Responses To Combinations mentioning

confidence: 99%

Dynamics of plant responses to combinations of air pollutants

Papazian

Blande

2019

Plant Biol J

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The focus of this review is on how plants respond to combinations of multiple air pollutants. Global pollution trends, plant physiological responses and ecological perspectives in natural and agricultural systems are all discussed. In particular, we highlight the importance of studying sequential or simultaneous exposure of plants to pollutants, rather than exposure to individual pollutants in isolation, and explore how these responses may interfere with the way plants interact with their biotic community. Air pollutants can alter the normal physiology and metabolic functioning of plants. Here we describe how the phenotypic and molecular changes in response to multiple pollutants can differ compared to those elicited by single pollutants, and how different responses have been observed between plants in the field and in controlled laboratory conditions and between trees and crop plants. From an ecological perspective, we discuss how air pollution can result in greater susceptibility to biotic stressors and in direct or indirect effects on interactions with organisms that occupy higher trophic levels. Finally, we provide an overview of the potential uses of plants to mitigate air pollution, exploring the feasibility for pollution removal via the processes of bio-accumulation and phytoremediation. We conclude by proposing some new directions for future research in the field.

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Strong effects of hydrologic environment and weak effects of elevated CO2 on the invasive weed Alternanthera philoxeroides and the biocontrol beetle Agasicles hygrophila

Henriksen

Lim

et al. 2018

Arthropod-Plant Interactions

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The growth response of Alternanthera philoxeroides in a simulated post-combustion emission with ultrahigh [CO2] and acidic pollutants

Cited by 7 publications

References 40 publications

Effects of clonal integration and light availability on the growth and physiology of two invasive herbs

Effects of clonal integration and light availability on the growth and physiology of two invasive herbs

Dynamics of plant responses to combinations of air pollutants

Strong effects of hydrologic environment and weak effects of elevated CO2 on the invasive weed Alternanthera philoxeroides and the biocontrol beetle Agasicles hygrophila

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