Interspecific Competition in Arabidopsis thaliana: A Knowledge Gap Is Starting to Close

Bartelheimer, Maik; Schmid, Christoph; Storf, Joana; Hell, Katharina; Bauer, Sibylle

doi:10.1007/978-3-319-08807-5_12

Cited by 11 publications

(9 citation statements)

References 45 publications

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“…We found that A. thaliana can inhabit diverse and contrasted plant assemblages in south-west of France. This observation is in line with previous studies reporting (i) the potential interactions of A. thaliana with a large number of plant species in natural communities in other French geographical regions (Brachi et al 2013), and (ii) the extensive genetic diversity of A. thaliana for the response to interspecific competition observed in common garden experiments (Baron et al 2015;Bartelheimer et al 2015;Frachon et al 2017).…”

Section: Discussionsupporting

confidence: 92%

Adaptation to Plant Communities across the Genome of Arabidopsis thaliana

Frachon

Mayjonade

Bartoli

et al. 2019

Molecular Biology and Evolution

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Despite the importance of plant-plant interactions on plant community dynamics and crop yield, our understanding of the adaptive genetics underlying these interactions is still limited and deserves to be investigated in the context of complex and diffuse interactions occurring in plant assemblages. Here, based on 145 natural populations of Arabidopsis thaliana located in southwest of France and characterized for plant communities, we conducted a Genome-Environment Association analysis to finely map adaptive genomic regions of A. thaliana associated with plant community descriptors. To control for correlated abiotic environment effects, we also characterized the populations for a set of biologically meaningful climate and soil variables. A non-negligible fraction of top SNPs was associated with both plant community descriptors and abiotic variables, highlighting the importance of considering the actual abiotic drivers of plant communities to disentangle genetic variants for biotic adaptation from genetic variants for abiotic adaptation. The adaptive loci associated with species abundance were highly dependent on the identity of the neighboring species suggesting a high degree of biotic specialization of A. thaliana to members of its plant interaction network. Moreover, the identification of adaptive loci associated with α-diversity and composition of plant communities supports the ability of A. thaliana to interact simultaneously with multiple plant neighbors, which in turn can help to understand the role of community-wide selection. Altogether, our study highlights that dissecting the genetic basis underlying plant-plant interactions at a regional scale while controlling for abiotic confounding factors, can help understanding the adaptive mechanisms modulating natural plant assemblages.

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Section: Discussionsupporting

confidence: 92%

Adaptation to Plant Communities across the Genome of Arabidopsis thaliana

Frachon

Mayjonade

Bartoli

et al. 2019

Molecular Biology and Evolution

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“…However, several studies recently challenged this view: (i) by revealing extensive genetic diversity in A . thaliana for the response to intra‐ and interspecific competition (Bartelheimer et al ., ); (ii) by finding that plant–plant interactions may act as selective agents on phenology in A . thaliana (Brachi et al ., , ); and (iii) by demonstrating the in situ adaptive evolution of a highly genetically polymorphic local population of A .…”

Section: The Genetics Of Natural Variation Of Plant–plant Interactionsmentioning

confidence: 99%

“…A. thaliana is not considered as being often challenged by other plant species in its natural habitats. However, several studies recently challenged this view: (i) by revealing extensive genetic diversity in A. thaliana for the response to intra-and interspecific competition (Bartelheimer et al, 2015); (ii) by finding that plant-plant interactions may act as selective agents on phenology in A. thaliana (Brachi et al, 2012(Brachi et al, , 2013; and (iii) by demonstrating the in situ adaptive evolution of a highly genetically polymorphic local population of A. thaliana to increased interspecific competition in less than eight generations (Frachon et al, 2017). Therefore, A. thaliana appears as a valuable model system for studying the genetics of natural variation of plant-plant interactions.…”

Section: Highlights On the Nature Of The Datamentioning

confidence: 99%

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The genetics underlying natural variation of plant–plant interactions, a beloved but forgotten member of the family of biotic interactions

et al. 2018

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Despite the importance of plant-plant interactions on crop yield and plant community dynamics, our understanding of the genetic and molecular bases underlying natural variation of plant-plant interactions is largely limited in comparison with other types of biotic interactions. By listing 63 quantitative trait loci (QTL) mapping and global gene expression studies based on plants directly challenged by other plants, we explored whether the genetic architecture and the function of the candidate genes underlying natural plant-plant interactions depend on the type of interactions between two plants (competition versus commensalism versus reciprocal helping versus asymmetry). The 16 transcriptomic studies are unevenly distributed between competitive interactions (n = 12) and asymmetric interactions (n = 4, all focusing on response to parasitic plants). By contrast, 17 and 30 QTL studies were identified for competitive interactions and asymmetric interactions (either weed suppressive ability or response to parasitic plants), respectively. Surprisingly, no studies have been carried out on the identification of genetic and molecular bases underlying natural variation in positive interactions. The candidate genes underlying natural plant-plant interactions can be classified into seven categories of plant function that have been identified in artificial environments simulating plant-plant interactions either frequently (photosynthesis, hormones), only recently (cell wall modification and degradation, defense pathways against pathogens) or rarely (ABC transporters, histone modification and meristem identity/life history traits). Finally, we introduce several avenues that need to be explored in the future to obtain a thorough understanding of the genetic and molecular bases underlying plant-plant interactions within the context of realistic community complexity.

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“…The barley + silage maize phase of the R3 rotation offered a similar temporal gap for the establishment of these weeds between the maize harvest and the next barley sowing. Arabidopsis thaliana only forms basal leaf rosettes, with an upright growth limited to just a floral scape up to 40 cm tall (Bartelheimer et al , 2015). Hovick et al (2012) reported that A. thaliana responded negatively to competition by species with higher plant cover, suggesting that competition for light is of great relevance.…”

Section: Discussionmentioning

confidence: 99%

Weed seedling emergence in contrasting fodder crop systems following 30 years of cultivation in the lowlands of Northern Italy

Borrelli¹,

Pecetti²

2020

Weed Research

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Five fodder crop systems of different intensity (ranging from a double annual crop of Italian ryegrass + silage maize to a permanent meadow) were adopted for 30 years in the lowlands of Northern Italy under two input levels, differing mainly in their provision of organic fertiliser (manure). Herbicides were used in the maize crops included in all systems, except the meadow. After 30 years, the weed seedbank of all systems and input levels were assessed by the seedling emergence technique on soil samples from each plot. The cropping systems determined the abundance and composition of the weed assembly. Relatively few, frequent species made up the majority of the emerged seedlings in all systems, and there was no relationship between the total number of emerged seedlings and the mean number of species recorded in the different systems. Arabidopsis thaliana and Oxalis corniculata were abundant in the annual double crop and in the 3‐ and 6‐year rotations that also comprised the annual double crop. These weeds, however, were unlikely to represent a major threat to the crops, due to their vigour and growth period. The permanent meadow tended to greater weed biodiversity than the other systems. The application of manure favoured the seedbank of species such as Lolium multiflorum, Digitaria sanguinalis and A. thaliana. Weed communities in the different systems were mainly determined by herbicide application, (through the ability of weeds to avoid its effects, determined by the weed life history and emergence period) and manure application (with its possible dual effect of spreading weed seeds and favouring nitrogen‐responsive weeds).

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Interspecific Competition in Arabidopsis thaliana: A Knowledge Gap Is Starting to Close

Cited by 11 publications

References 45 publications

Adaptation to Plant Communities across the Genome of Arabidopsis thaliana

Adaptation to Plant Communities across the Genome of Arabidopsis thaliana

The genetics underlying natural variation of plant–plant interactions, a beloved but forgotten member of the family of biotic interactions

Weed seedling emergence in contrasting fodder crop systems following 30 years of cultivation in the lowlands of Northern Italy

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