Does the coefficient of variation reflect developmental instability in plants?

Veličković, Miroslava; Stanković, Siniša

doi:10.2298/abs0503247v

Cited by 6 publications

(3 citation statements)

References 5 publications

(1 reference statement)

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“…A large number of authors have used the degree of morphological variation as an index of developmental homeostasis (Rasmuson 1960; Mitton 1978; Yezerinac et al . 1992; Sherry & Lord 1996; Veličković 2005). Moreover, several reports on plants have shown that these organisms are ideal for studying genotypic and environmental influences on developmental stability (Cowart & Graham 1999).…”

Section: Introductionmentioning

confidence: 99%

Patterns of leaf asymmetry changes inPlantago majorL. (ssp.major) natural populations exposed to different environmental conditions

Veličković

Savić

2011

Plant Species Biology

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In the present study, developmental stability of leaf traits was examined in three natural populations of Plantago major L. (ssp. major), representing two polluted environments (Karaburma and Zemun) and an unpolluted area (Crni Lug). Developmental stability was assessed as fluctuating asymmetry (FA). The magnitude of FA is believed to reflect differences in the ability of individuals to buffer their development in natural populations. We hypothesized that there are differences within characters and among characters in response to environmental conditions. Significant patterns of asymmetry correlations and asymmetry changes were detected both within characters and between characters. The manova results revealed a significant effect of individual and a significant individual ¥ environment interaction on actual asymmetry (logLi -logRi) and on the amount of asymmetry |(logLi -logRi)| for leaf width and vein distances within a leaf. Over time, statistically significant and positive correlations of the FA values were detected for each trait separately per sample (population). For both leaf traits, there were differences for (logLi -logRi) and |(logLi -logRi)| asymmetry values among individuals within samples in response to yearly variations. Statistically significant and negative correlations for(logLi -logRi) versus |(logLi -logRi)| asymmetries were detected for both leaf traits. In summary, our results highlight the importance of differences in the ability of individuals to buffer their development under different environmental conditions and point to the concept that developmental stability is character specific.

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Section: Introductionmentioning

confidence: 99%

Patterns of leaf asymmetry changes inPlantago majorL. (ssp.major) natural populations exposed to different environmental conditions

Veličković

Savić

2011

Plant Species Biology

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“…Selection on whole‐plant traits, such as growth, could indirectly alter the range of traits achieved across tissue ontogeny (Fiorani et al, 2000) or increase developmental instability and trait “noise” as leaves mature (Arendt, 1997). Such developmental instability, and subsequent effects on levels of trait variation among plant tissues, could also increase with hybridization (Albarrán‐Lara et al, 2010; Møller & Shykoff, 1999; Veličković & Stanković, 2005)—a common part of the domestication and improvement process (but see Gardner, 1995; Waldmann, 1999). In contrast, genome duplication, another common feature of domesticated plants (Ramanna & Jacobsen, 2003; Salman‐Minkov et al, 2016), has been found to buffer and minimize stochastic gene expression (Cook et al, 1998; Klingenberg, 2003; Soltani et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

A domestic plant differs from its wild relative along multiple axes of within‐plant trait variability and diversity

Robinson

Schilmiller

Wetzel

2022

Ecology and Evolution

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For 10,000 years humans have altered plant traits through domestication and ongoing crop improvement, shaping plant form and function in agroecosystems. To date, studies have focused on how these processes shape whole‐plant or average traits; however, plants also have characteristic levels of trait variability among their repeated parts, which can be heritable and mediate critical ecological interactions. Here, we examine an underappreciated scale of trait variation—among leaves, within plants—that may have changed through the process of domestication and improvement. Variability at this scale may itself be a target of selection, or be shaped as a by‐product of the domestication process. We explore how levels of among‐leaf trait variability differ between cultivars and wild relatives of alfalfa (Medicago sativa), a key forage crop with a 7,000‐year domestication history. We grew individual plants from 30 wild populations and 30 cultivars, and quantified variability in a broad suite of physical, nutritive, and chemical leaf traits, including measures of chemical dissimilarity (beta diversity) among leaves within each plant. We find that trait variability has changed over the course of domestication, with effects often larger than changes in trait means. Domestic alfalfa had elevated among‐leaf variability in SLA, trichomes, and C:N; increased diversity in defensive compounds; and reduced variability in phytochemical composition. We also elucidate fundamental relationships between trait means and variability, and between overall production of secondary metabolites and patterns of chemical diversity. We conclude that within‐plant variability is an overlooked dimension of trait diversity in a globally critical agricultural crop. Trait variability is actually higher in cultivated plants compared to wild progenitors for multiple nutritive, physical, and chemical traits, highlighting a scale of variation that may mitigate loss of trait diversity at other scales in alfalfa agroecosystems, and in other crops with similar histories of domestication and improvement.

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“…Selection on whole-plant traits, such as growth, could indirectly alter the range of traits achieved across tissue ontogeny (Fiorani et al, 2000) or increase developmental instability and trait 'noise' as leaves mature (Arendt, 1997). Such developmental instability, and subsequent effects on levels of trait variation among plant tissues, could also increase with hybridization (Møller & Shykoff, 1999;Veličković & Stanković, 2005;Albarrán-Lara et al, 2010) -a common part of the domestication and improvement process (but see Gardner, 1995;Waldmann, 1999). In contrast, genome duplication, another common feature of domesticated plants (Ramanna & Jacobsen, 2003;Salman-Minkov et al, 2016), has been found to buffer and minimize stochastic gene expression (Cook et al, 1998;Klingenberg, 2003;Soltani et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

A domestic plant differs from its wild relative along multiple axes of within-plant trait variability and diversity

Robinson

Schilmiller

Wetzel

2020

Preprint

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For over 10,000 years humans have shaped plant traits through domestication. Studies of domestication have focused on changes to trait averages; however, plants also have characteristic levels of trait variability among their repeated parts, which can be heritable and mediate critical ecological interactions. Here, we ask how domestication selection has altered among-leaf trait variability using alfalfa (Medicago sativa), the oldest forage crop in the world. We found that domestication changed variability more than averages for multiple traits. Relative to wild progenitors, domesticates had elevated variability in specific leaf area, trichomes, C:N, and phytochemical concentrations and reduced variability in phytochemical composition among their leaves. Our work shows that within-plant trait variability is a novel facet of the domesticated plant phenotype, constituting a novel frontier of trait diversity within crop fields. As many critical biotic interactions occur at the scale of individual plants, our findings suggest that trait variability and diversity among leaves could act to magnify or counter the depauperate trait diversity often found at higher scales in agroecosystems.

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Does the coefficient of variation reflect developmental instability in plants?

Abstract: Developmental stability or homeostasis refers to the ability of an individual to produce a consistent phenotype in a given environment (Graham et al. 1993). Reduced developmental stability can result from a wide variety of environmentally (or genetically) induced perturbations

Cited by 6 publications

References 5 publications

Patterns of leaf asymmetry changes inPlantago majorL. (ssp.major) natural populations exposed to different environmental conditions

Patterns of leaf asymmetry changes inPlantago majorL. (ssp.major) natural populations exposed to different environmental conditions

A domestic plant differs from its wild relative along multiple axes of within‐plant trait variability and diversity

A domestic plant differs from its wild relative along multiple axes of within-plant trait variability and diversity

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