Maternal effects provide phenotypic adaptation to local environmental conditions

Galloway, Laura F.

doi:10.1111/j.1469-8137.2004.01314.x

Cited by 314 publications

(301 citation statements)

References 54 publications

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“…Individuals in this population grow on a hillside under the deciduous forest canopy as well as in tree-fall light gaps; fairly typical habitat for this species (Galloway, 2005). Two seeds per family were germinated in a growth chamber in a randomized design (211C day/121C night, 12 h days).…”

Section: Artificial Selectionmentioning

confidence: 99%

Artificial selection shifts flowering phenology and other correlated traits in an autotetraploid herb

2007

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There is mounting evidence that plants are responding to anthropogenic climate change with shifts in flowering phenologies. We conducted a three-generation artificial selection experiment on flowering time in Campanulastrum americanum, an autotetraploid herb, to determine the potential for adaptive evolution of this trait as well as possible costs associated with enhanced or delayed flowering. Divergent selection for earlier and later flowering resulted in a 25-day difference in flowering time. Experiment-wide heritability was 0.31 and 0.23 for the initiation of flowering in early and late lines, respectively. Selection for earlier flowering resulted in significant correlated responses in other traits including smaller size, fewer branches, smaller floral displays, longer fruit maturation times, fewer seeds per fruit and slower seed germination. Results suggest that although flowering time shows the potential to adapt to a changing climate, phenological shifts may be associated with reduced plant fitness possibly hindering evolutionary change.

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Section: Artificial Selectionmentioning

confidence: 99%

Artificial selection shifts flowering phenology and other correlated traits in an autotetraploid herb

2007

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“…In fact, individuals faced with low resource levels during growth inevitably grow less. Nevertheless, phenotypic responses to different environments may also include specific developmental and functional adjustments that increase fitness in those environments [7,13,27,44,49]. According to the optimal partitioning theory, plants respond to stressful environmental conditions by shifting carbon allocation to the organs collecting the most limiting resource, a form of plasticity conducive to growth maximization [5,11,42].…”

Section: Introductionmentioning

confidence: 99%

Divergence among species and populations of Mediterranean pines in biomass allocation of seedlings grown under two watering regimes

2007

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-Seedlings of four populations each of Pinus pinaster, P. halepensis, P. canariensis and P. pinea were grown in controlled conditions to evaluate both inter-and intra-specific differences in response to watering. We submitted half of the plants to a moderate water stress and after 22 weeks, we recorded height, stem diameter and root, stem and leaves dry weight. Patterns and amounts of phenotypic changes, including changes in biomass allocation, were analysed. We found a scant response in P. canariensis, P. pinaster and P. halepensis presented high population divergence for phenotypic changes, and P. pinea showed marked allocational shifts and no population divergence. The phenotypic changes observed within species are interpreted as a plastic response. The variation encountered within P. halepensis and P. pinaster may be indicative of specialisation to either resource-rich or resource-poor habitats, being populations from favourable sites more plastic. P. pinea exhibited a very uniform plastic response, indicating generalist behaviour.phenotypic changes / early testing / pine / drought stress / ontogeny Résumé -Divergences parmi les espèces et populations de pins méditerranéens pour l'allocation de biomasse chez des semis poussant sous deux régimes d'alimentation hydrique. Des semis de quatre populations de Pinus pinaster, de P. halepensis, de P. canariensis, et de P. pinea ont été élevés en conditions contrôlées pour évaluer au niveau inter-et intra-spécifique les différences de réponse au régime d'alimentation hydrique. Nous avons soumis la moitié des plants à un stress hydrique modéré et après 22 semaines nous avons mesuré leur hauteur, le diamètre de la tige et des racines, le poids sec de la tige et des feuilles. Les modèles et l'importance des changements phénotypiques, incluant les variations d'allocation de biomasse ont été analysés. Nous avons trouvé une faible réponse pour P. canariensis ; P. pinaster et P. halepensis ont présenté une importante divergence des populations au plan des changements phénotypiques, et P. pinea a montré une modification sensible au plan de l'allocation de biomasse sans divergence de population. Les changements phénotypiques observés chez les espèces ont été interprétés comme une réponse en terme de plasticité. Les variations rencontrées chez P. halepensis et P. pinaster peuvent être l'indice d'une spécialisation pour des habitats riches ou pauvres en terme de ressources. P. pinea a présenté une plasticité uniforme de réponse, révélant un comportement généraliste. changements phénotypiques / test précoce / stress hydrique / ontogénie

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“…The phenotypic response to environmental change is thought to include nongenetic, transgenerational processes (Bonduriansky and Day, 2009) that likely integrate epigenetic and/or maternal factors (Johannes et al, 2008;Danchin et al, 2011). Although maternal effects have been shown to influence these plant responses (Galloway, 2005), the involvement of organellar processes has not been formally demonstrated.…”

mentioning

confidence: 99%

The Chloroplast Triggers Developmental Reprogramming When MUTS HOMOLOG1 Is Suppressed in Plants

Santamaria

Virdi

et al. 2012

Plant Physiology

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Multicellular eukaryotes demonstrate nongenetic, heritable phenotypic versatility in their adaptation to environmental changes. This inclusive inheritance is composed of interacting epigenetic, maternal, and environmental factors. Yet-unidentified maternal effects can have a pronounced influence on plant phenotypic adaptation to changing environmental conditions. To explore the control of phenotypy in higher plants, we examined the effect of a single plant nuclear gene on the expression and transmission of phenotypic variability in Arabidopsis (Arabidopsis thaliana). MutS HOMOLOG1 (MSH1) is a plant-specific nuclear gene product that functions in both mitochondria and plastids to maintain genome stability. RNA interference suppression of the gene elicits strikingly similar programmed changes in plant growth pattern in six different plant species, changes subsequently heritable independent of the RNA interference transgene. The altered phenotypes reflect multiple pathways that are known to participate in adaptation, including altered phytohormone effects for dwarfed growth and reduced internode elongation, enhanced branching, reduced stomatal density, altered leaf morphology, delayed flowering, and extended juvenility, with conversion to perennial growth pattern in short days. Some of these effects are partially reversed with the application of gibberellic acid. Genetic hemicomplementation experiments show that this phenotypic plasticity derives from changes in chloroplast state. Our results suggest that suppression of MSH1, which occurs under several forms of abiotic stress, triggers a plastidial response process that involves nongenetic inheritance.

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Maternal effects provide phenotypic adaptation to local environmental conditions

Cited by 314 publications

References 54 publications

Artificial selection shifts flowering phenology and other correlated traits in an autotetraploid herb

Artificial selection shifts flowering phenology and other correlated traits in an autotetraploid herb

Divergence among species and populations of Mediterranean pines in biomass allocation of seedlings grown under two watering regimes

The Chloroplast Triggers Developmental Reprogramming When MUTS HOMOLOG1 Is Suppressed in Plants

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