Geographic and genetic variation in susceptibility of Butomus umbellatus to foliar fungal pathogens

Harms, Nathan E.; Shearer, Judy F.; Cronin, James T.; Gaskin, John F.

doi:10.1007/s10530-019-02109-3

Cited by 14 publications

(7 citation statements)

References 77 publications

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“…For invaders with multiple introduced genotypes, determining how environmental variation contributes to their success, and whether the response to the environment varies by genotype, can improve predictions about which invaders (or genotypes) will become invasive (i.e., using a trait‐based approach; Bhattarai et al, 2017 ; Davidson et al, 2011 ; Weinig et al, 2007 ) and guide decision‐making around management actions (Gaskin et al, 2011 ; Thum, 2018 ). There are a growing number of invaders for which it is clear that management should be tailored at the subspecific level (Blossey & Casagrande, 2016 ; Croy et al, 2020 ; Harms, Shearer, et al, 2020 ; Harms, Williams, & Purcell, 2021 ), and this work further supports continuation of that research direction. How genotypes of introduced species differ in their tolerance or response to environmental variation is key to distinguishing invasive traits, and thus modeling their distribution and impacts in the invaded range.…”

Section: Discussionsupporting

confidence: 64%

Intraspecific trait plasticity to N and P of the wetland invader, Alternanthera philoxeroides under flooded conditions

Harms

Knight

DeRossette

et al. 2023

Ecology and Evolution

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Interactions between invaders and resource availability may explain variation in their success or management efficacy. For widespread invaders, regional variation in plant response to nutrients can reflect phenotypic plasticity of the invader, genetic structure of invading populations, or a combination of the two. The wetland weed Alternanthera philoxeroides (alligatorweed) is established throughout the southeastern United States and California and has high genetic diversity despite primarily spreading clonally. Despite its history in the United States, the role of genetic variation for invasion and management success is only now being uncovered. To better understand how nutrients and genotype may influence A. philoxeroides invasion, we measured the response of plants from 26 A. philoxeroides populations (three cp haplotypes) to combinations of nitrogen (4 or 200 mg/L N) and phosphorus (0.4 or 40 mg/L P). We measured productivity (biomass accumulation and allocation), plant architecture (stem diameter and thickness, branching intensity), and foliar traits (toughness, dry matter content, percent N, and percent P). A short‐term developmental assay was also conducted by feeding a subset of plants from the nutrient experiment to the biological control agent Agasicles hygrophila , to determine whether increased availability of N or P to its host influenced agent performance, as has been previously suggested. Alternanthera philoxeroides haplotype Ap1 was more plastic than other haplotypes in response to nutrient amendments, producing more than double the biomass from low to high N and 50%–68% higher shoot: root ratio than other haplotypes in the high N treatment. Alternanthera philoxeroides haplotypes differed in seven of 10 variables in response to increased N. We found no differences in short‐term A. hygrophila development between haplotypes but mass was 23% greater in high than low N treatments. This study is the first to explore the interplay between nutrient availability, genetic variation, and phenotypic plasticity in invasive characteristics of the global invader, A. philoxeroides .

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Section: Discussionsupporting

confidence: 64%

Intraspecific trait plasticity to N and P of the wetland invader, Alternanthera philoxeroides under flooded conditions

Harms

Knight

DeRossette

et al. 2023

Ecology and Evolution

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“…Butomus umbellatus establishment and spread in North American aquatic habitats has generated negative ecological and economic impacts, leading to increased interest in predicting invasiveness, potential distribution (Banerjee et al, in prep), and development of effective management tools for the species [59,70,71]. However, research on B. umbellatus management has largely failed to take into account genetic variation and the implications of differences in ploidy in the invaded range (but see [72][73][74][75][76][77][78][79][80].…”

Section: Discussionmentioning

confidence: 99%

“…As demonstrated here and elsewhere, genetic variability in invasive species may be sufficient to generate patterns where some areas are more prone to invasion than others. In North America, B. umbellatus is represented by several genotypes within two cytotypes which vary in a number of important traits, including pathogen susceptibility [59], nutrient response [86], and competitive ability (this study). Future research into ecosystem impacts or to develop effective management strategies for B. umbellatus should take this variability into account.…”

Section: Discussionmentioning

confidence: 99%

“…Although there have been multiple introductions into North America, the source areas for introduced genotypes has yet to be determined. However, investigations into ecological differences between cytotypes have uncovered variation in disease susceptibility [59] and nutrient response (Harms et al, in review), with implications for cytotype-specific management strategies. Butomus umbellatus colonizes a variety of wetland and aquatic habitats including shallow wetlands, slow-moving rivers, large reservoirs, ponds, and roadside ditches [60][61][62].…”

Section: Study Systemmentioning

confidence: 99%

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Competitive Interactions of Flowering Rush (Butomus umbellatus L.) Cytotypes in Submersed and Emergent Experimental Aquatic Plant Communities

Harms

2020

Diversity

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The ability to invade communities in a variety of habitats (e.g., along a depth gradient) may facilitate establishment and spread of invasive plants, but how multiple lineages of a species perform under varying conditions is understudied. A series of greenhouse common garden experiments were conducted in which six diploid and four triploid populations of the aquatic invasive plant Butomus umbellatus L. (Butomaceae) were grown in submersed or emergent conditions, in monoculture or in a multispecies community, to compare establishment and productivity of cytotypes under competition. Diploid biomass overall was 12 times higher than triploids in the submersed experiment and three times higher in the emergent experiment. Diploid shoot:root ratio was double that of triploid plants in submersed conditions overall, and double in emergent conditions in monoculture. Relative interaction intensities (RII) indicated that triploid plants were sixteen times more negatively impacted by competition under submersed conditions but diploid plants were twice as impacted under emergent conditions. Recipient communities were similarly negatively impacted by B. umbellatus cytotypes. This study supports the idea that diploid and triploid B. umbellatus plants are equally capable of invading emergent communities, but that diploid plants may be better adapted for invading in submersed habitats. However, consistently lower shoot:root ratios in both monoculture and in communities suggests that triploid plants may be better-adapted competitors in the long term due to increased resource allocation to roots. This represents the first examination into the role of cytotype and habitat on competitive interactions of B. umbellatus.

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“…Polyploids exhibit improvement such as adaptivity to abiotic stress, e.g. drought (del Pozo and Ramirez-Parra, 2014;Martínez et al, 2018), cold (Klatt et al, 2018), heat (Godfree et al, 2017), salt (Chao et al, 2013), and light (Coate et al, 2013), biotic-stress tolerance e.g., against pathogen (Keane et al, 2014;Hannweg et al, 2016;Hias et al, 2017), against competitors (Wu et al, 2019;Harms et al, 2020), in mutualistic interaction photosynthesis efficiency (Anneberg and Segraves, 2019;Acuña-Rodríguez et al, 2020), metabolite alternation (Iannicelli et al, 2020), and reactive oxygen species (ROS) scavenging (Deng et al, 2012;Wei et al, 2019). Polyploidy also influences plant reproduction and fitness, especially apomixis, i.e., the asexual reproduction via seed (Asker and Jerling, 1992).…”

Section: Polyploidymentioning

confidence: 99%

Ploidy-dependent effect of prolonged photoperiod on mode of reproduction and photosynthesis in the Ranunculus auricomus complex (Ranunculaceae)

Bahrul¹

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Geographic and genetic variation in susceptibility of Butomus umbellatus to foliar fungal pathogens

Cited by 14 publications

References 77 publications

Intraspecific trait plasticity to N and P of the wetland invader, Alternanthera philoxeroides under flooded conditions

Intraspecific trait plasticity to N and P of the wetland invader, Alternanthera philoxeroides under flooded conditions

Competitive Interactions of Flowering Rush (Butomus umbellatus L.) Cytotypes in Submersed and Emergent Experimental Aquatic Plant Communities

Ploidy-dependent effect of prolonged photoperiod on mode of reproduction and photosynthesis in the Ranunculus auricomus complex (Ranunculaceae)

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