The soil microbial community alters patterns of selection on flowering time and fitness‐related traits in <i>Ipomoea purpurea</i>

Chaney, Lindsay; Baucom, Regina S.

doi:10.1002/ajb2.1426

Cited by 33 publications

(33 citation statements)

References 46 publications

(76 reference statements)

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“…However, it is unknown whether the same traits are involved in shaping the maize microbiome. An additional complication is the fact that the microbiome can, in turn, affect phenotypic expression in the host plant (Panke‐Buisse et al ., 2017; Berg & Koskella, 2018; O’Brien et al ., 2019) as well as the relationship between phenotype and yield (Wagner et al ., 2014; Chaney & Baucom, 2020). For these reasons, careful experimentation – not just simultaneous measurement of plant traits and microbiome features – will be needed to clarify the phenotypic links between heterozygosity and microbiome heterosis (Fig.…”

Section: Discussionmentioning

confidence: 99%

Heterosis of leaf and rhizosphere microbiomes in field‐grown maize

et al. 2020

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Macroorganisms' genotypes shape their phenotypes, which in turn shape the habitat available to potential microbial symbionts. This influence of host genotype on microbiome composition has been demonstrated in many systems; however, most previous studies have either compared unrelated genotypes or delved into molecular mechanisms. As a result, it is currently unclear whether the heritability of host-associated microbiomes follows similar patterns to the heritability of other complex traits. We take a new approach to this question by comparing the microbiomes of diverse maize inbred lines and their F 1 hybrid offspring, which we quantified in both rhizosphere and leaves of field-grown plants using 16S-v4 and ITS1 amplicon sequencing. We show that inbred lines and hybrids differ consistently in the composition of bacterial and fungal rhizosphere communities, as well as leaf-associated fungal communities. A wide range of microbiome features display heterosis within individual crosses, consistent with patterns for nonmicrobial maize phenotypes. For leaf microbiomes, these results were supported by the observation that broad-sense heritability in hybrids was substantially higher than narrow-sense heritability. Our results support our hypothesis that at least some heterotic host traits affect microbiome composition in maize.

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Section: Discussionmentioning

confidence: 99%

Heterosis of leaf and rhizosphere microbiomes in field‐grown maize

et al. 2020

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“…Our reciprocal transplants revealed that serpentine microorganisms, when in non-serpentine soils, accelerate vegetative, early flowering, and flowering phenology (Table 4). The importance of the microbial community for time to flowering has been previously demonstrated in Arabidopsis (Wagner et al 2014) and Ipomea purpurea (Chaney and Baucom 2020). Drought-adapted microbes accelerated flowering in Brassica when compared to non-drought-adapted microbes (Lau and Lennon 2012).…”

Section: Discussionmentioning

confidence: 88%

Plant phenology influences rhizosphere microbial community and is accelerated by serpentine microorganisms inPlantago erecta

Igwe

Quasem

Liu

et al. 2021

Preprint

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Serpentine soils are drought-prone and rich in heavy metals, and plants growing on serpentine soils host distinct microbial communities that may affect plant survival and phenotype. However, whether the rhizosphere communities of plants from different soil chemistries are initially distinct or diverge over time may help us understand drivers of microbial community structure and function in stressful soils. Here, we test the hypothesis that rhizosphere microbial communities will converge over time (plant development), independent of soil chemistry and microbial source. We grew Plantago erecta in serpentine or nonserpentine soil, with serpentine or nonserpentine microbes and tracked plant growth and root phenotypes. We used 16S rRNA barcoding to compare bacterial species composition at seedling, vegetative, early-, and late-flowering phases. Plant phenotype and rhizosphere bacterial communities were mainly structured by soil type, with minor contributions by plant development, microbe source and their interactions. Serpentine microorganisms promoted early flowering in plants on non-serpentine soils. Despite strong effects of soil chemistry, the convergence in bacterial community composition across development demonstrates the importance of the plant-microbe interactions in shaping microbial assembly processes across soil types.

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“…One way in which determining whether and how environmental microbial communities may mitigate plant adaptation is by determining whether such communities act as a selective agent on important plant traits. Chaney and Baucom (2020) show this to be the case by autoclaving soil to modify the soil microbial community. Doing so altered the pattern of selection on growth and flowering phenology in the common morning glory, Ipomoea purpurea, compared to plants growing in intact soils.…”

Section: Living Togethermentioning

confidence: 88%

Plant–environment interactions from the lens of plant stress, reproduction, and mutualisms

Baucom

Heath

Chambers

2020

American J of Botany

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The evolutionary processes that take place in invasive plant populations are not well documented or understood. Interspecific hybridization between cultivated radish (Raphanus sativus) and R. raphanistrum is known to be responsible for the origin of the invasive California wild radish, but little is known about the nature of the hybridization events that produced the hybrid‐derived lineage. We analyzed the trnL‐rpl32 intergenic region of chloroplast DNA (cpDNA) obtained from 37 cultivated radish individuals from four different cultivars, 53 R. raphanistrum individuals from six European populations and 104 California wild radish individuals from 11 populations covering its entire range throughout the state. We found that cultivated radish and R. raphanistrum shared no cpDNA haplotypes but that they both shared haplotypes with California wild radish, evidence for bidirectional hybridization between the progenitor species in the creation of the California lineage. We also found evidence that multiple cultivars and multiple European source populations contributed to the diversity of cpDNA haplotypes within California. Studies like this will continue to be important for our understanding of the origin of invasive populations and the mechanisms by which they succeed.

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The soil microbial community alters patterns of selection on flowering time and fitness‐related traits in Ipomoea purpurea

Cited by 33 publications

References 46 publications

Heterosis of leaf and rhizosphere microbiomes in field‐grown maize

Heterosis of leaf and rhizosphere microbiomes in field‐grown maize

Plant phenology influences rhizosphere microbial community and is accelerated by serpentine microorganisms inPlantago erecta

Plant–environment interactions from the lens of plant stress, reproduction, and mutualisms

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