Recent Submissions

  • Analysis of Inbreeding Depression in Mixed-Mating Plants Provides Evidence for Selective Interference and Stable Mixed Mating 

    Winn, Alice A., Elizabeth Elle, Susan Kalisz, Pierre-Olivier Cheptou, et al. 2011. "Analysis of Inbreeding Depression in Mixed-Mating Plants Provides Evidence for Selective Interference and Stable Mixed Mating." Evolution 65(12): 3339-3359.
    Hermaphroditic individuals can produce both selfed and outcrossed progeny, termed mixed mating. General theory predicts that mixed-mating populations should evolve quickly toward high rates of selfing, driven by rapid ...
  • Plant mating systems in a changing world 

    Eckert, Christopher G., Susan Kalisz, Monica A. Geber, Risa Sargent, et al. 2010. "Plant mating systems in a changing world." Trends in Ecology & Evolution 25(1): 35-43.
    There is increasing evidence that human disturbance can negatively impact plant-pollinator interactions such as outcross pollination. We present a meta-analysis of 22 studies involving 27 plant species showing a significant ...
  • Correlated evolution of mating system and floral display traits in flowering plants and its implications for the distribution of mating system variation 

    Goodwillie, Carol, Risa D. Sargent, Christopher G. Eckert, Elizabeth Elle, et al. 2010. "Correlated evolution of mating system and floral display traits in flowering plants and its implications for the distribution of mating system variation." New Phytologist 185(1): 311-321.
    P> Reduced allocation to structures for pollinator attraction is predicted in selfing species. We explored the association between outcrossing and floral display in a broad sample of angiosperms. We used the demonstrated ...
  • Ovule Number Per Flower in a World of Unpredictable Pollination 

    Burd, Martin, Tia-Lynn Ashman, Diane R. Campbell, Michele R. Dudash, et al. 2009. "Ovule Number Per Flower in a World of Unpredictable Pollination." American Journal of Botany 96(6): 1159-1167.
    The number of ovules per flower varies over several orders of magnitude among angiosperms. Here we consider evidence that stochastic uncertainty in pollen receipt and Ovule fertilization has been a selective factor in the ...
  • Male-driven evolution of mitochondrial and chloroplastidial DNA sequences in plants 

    Whittle, CA, and MO Johnston. 2002. "Male-driven evolution of mitochondrial and chloroplastidial DNA sequences in plants." Molecular biology and evolution 19(6): 938-949.
    Although there is substantial evidence that, in animals, male-inherited neutral DNA evokes at a higher rate than female-inherited DNA, the relative evolutionary rate of male- versus female-inherited DNA hits not been ...
  • The cost of compensation 

    Simons, AM, and MO Johnston. 1999. "The cost of compensation." American Naturalist 153(6): 683-687.
    No abstract available.
  • Environmental and genetic sources of diversification in the timing of seed germination: Implications for the evolution of bet hedging 

    Simons, Andrew M., and Mark O. Johnston. 2006. "Environmental and genetic sources of diversification in the timing of seed germination: Implications for the evolution of bet hedging." Evolution 60(11): 2280-2292.
    Environmental variation that is not predictably related to cues is expected to drive the evolution of bet-hedging strategies. The high variance observed in the timing of seed germination has led to it being the most cited ...
  • Moving forward in determining the causes of mutations: the features of plants that make them suitable for assessing the impact of environmental factors and cell age 

    Whittle, C-A, and M. O. Johnston. 2006. "Moving forward in determining the causes of mutations: the features of plants that make them suitable for assessing the impact of environmental factors and cell age." Journal of experimental botany 57(9): 1847-1855.
    Currently, the types of factors that impact the mutation rate is a controversial issue. The marked attention towards identifying the factors that impact the genomic mutation rate is justified because mutations are the ...
  • Suboptimal timing of reproduction in Lobelia inflata may be a conservative bet-hedging strategy 

    Simons, AM, and MO Johnston. 2003. "Suboptimal timing of reproduction in Lobelia inflata may be a conservative bet-hedging strategy." Journal of Evolutionary Biology 16(2): 233-243.
    Age and size at reproduction are important components of fitness, and are variable both within and among angiosperm species. The fitness consequences of such life-history variation are most readily studied in organisms ...
  • Male-biased transmission of deleterious mutations to the progeny in Arabidopsis thaliana 

    Whittle, CA, and MO Johnston. 2003. "Male-biased transmission of deleterious mutations to the progeny in Arabidopsis thaliana." Proceedings of the National Academy of Sciences of the United States of America 100(7): 4055-4059.
    The extent and cause of male-biased mutation rates, the higher number of mutations in sperm than in eggs, is currently an active and controversial subject. Recent evidence indicates that this male (sperm) bias not only ...
  • Evolutionary history of the mating system in Amsinckia (Boraginaceae) 

    Schoen, DJ, MO Johnston, AM LHeureux, and JV Marsolais. 1997. "Evolutionary history of the mating system in Amsinckia (Boraginaceae)." Evolution 51(4): 1090-1099.
    A survey of restriction site variation in the chloroplast genome of the annual plant genus Amsinckia, together with estimation of outcrossing rates, was conducted to analyze the evolutionary history of rbe mating system. ...
  • Adaptive epigenetic memory of ancestral temperature regime in Arabidopsis thaliana 

    Whittle, C. A., S. P. Otto, M. O. Johnston, and J. E. Krochko. 2009. "Adaptive epigenetic memory of ancestral temperature regime in Arabidopsis thaliana." Botany-Botanique 87(6): 650-657.
    Although certain acquired nongenetic (i.e., epigenetic) traits are known to be heritable in plants, little is known currently about whether environmental parameters can induce adaptive epigenetic responses in plants and ...
  • Plasticity and the genetics of reproductive behaviour in the monocarpic perennial, Lobelia inflata (Indian tobacco) 

    Simons, AM, and MO Johnston. 2000. "Plasticity and the genetics of reproductive behaviour in the monocarpic perennial, Lobelia inflata (Indian tobacco)." Heredity 85(4): 356-365.
    The timing of reproduction is an important life-history variable, especially for organisms that die following a single reproductive episode, such as the monocarp Lobelia inflata. The propensity to initiate flowering (to ...
  • Quantitative Genetic Variation in Populations of Amsinckia Spectabilis that Differ in Rate of Self-Fertilization 

    Bartkowska, Magdalena P., and Mark O. Johnston. 2009. "Quantitative Genetic Variation in Populations of Amsinckia Spectabilis that Differ in Rate of Self-Fertilization." Evolution 63(5): 1103-1117.
    Self-fertilization is expected to reduce genetic diversity within populations and consequently to limit adaptability to changing environments. Little is known, however, about the way the evolution of self-fertilization ...
  • The genetic consequences of fluctuating inbreeding depression and the evolution of plant selfing rates 

    Porcher, E., J. K. Kelly, P. -O Cheptou, C. G. Eckert, et al. 2009. "The genetic consequences of fluctuating inbreeding depression and the evolution of plant selfing rates." Journal of Evolutionary Biology 22(4): 708-717.
    The magnitude of inbreeding depression, a central parameter in the evolution of plant mating systems, can vary depending on environmental conditions. However, the underlying genetic mechanisms causing environmental ...
  • Variation in seed traits of Lobelia inflata (Campanulaceae): Sources and fitness consequences 

    Simons, AM, and MO Johnston. 2000. "Variation in seed traits of Lobelia inflata (Campanulaceae): Sources and fitness consequences." American Journal of Botany 87(1): 124-132.
    Seed germination constitutes an important event in the life cycle of plants. Two related seed traits affect fitness: seed size and the timing of seed germination. In three sets of experiments, we (1) partition the sources ...
  • Developmental instability as a bet-hedging strategy 

    Simons, AM, and MO Johnston. 1997. "Developmental instability as a bet-hedging strategy." Oikos 80(2): 401-406.
    No abstract available.
  • Broad-scale analysis contradicts the theory that generation time affects molecular evolutionary rates in plants 

    Whittle, CA, and MO Johnston. 2003. "Broad-scale analysis contradicts the theory that generation time affects molecular evolutionary rates in plants." Journal of Molecular Evolution 56(2): 223-233.
    Several studies of plant taxa have concluded that generation time, including annual/perennial life history, may explain molecular evolutionary rate variation in selectively neutral DNA. Unlike in animals, there is little ...
  • Is G1 arrest in plant seeds induced by a p53-related pathway? 

    Whittle, CA, T. Beardmore, and MO Johnston. 2001. "Is G1 arrest in plant seeds induced by a p53-related pathway?." Trends in plant science 6(6): 248-251.
    In mammals, p53 is crucial for inducing the genes that lead to G1 arrest following DNA damage, enabling DNA repair. However, the possibility that such a system exists in plants has attracted little attention. Even though ...
  • Male and female pollination success in a deceptive orchid, a selection study 

    O'Connell, LM, and MO Johnston. 1998. "Male and female pollination success in a deceptive orchid, a selection study." Ecology 79(4): 1246-1260. Copyright by the Ecological Society of America.
    We carried out phenotypic selection analyses to assess the relative importance of several Horal traits, as well as microhabitat, in determining both male and female pollination success in a nonrewarding orchid (Cypripedium ...

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