Early root development of field-grown poplar: effects of planting material and genotype

Douglas, Grant; McIvor, Ian; Lloyd-West, C.M.

doi:10.1186/s40490-015-0057-4

Cited by 13 publications

(7 citation statements)

References 61 publications

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“…We have no evidence for the heterogeneity of the aboveground tree litter deposition since the poplar trees were clones planted at fixed distances from each other, and spontaneous growth of other tree species was not observed. The lateral and vertical distribution of poplar roots was not determined; however, considerable variation in total root mass and length of poplar clones of young age (1 to 3 years) has been reported in the field (Douglas, McIvor & Lloyd-West, 2016). Combined with the high spatial heterogeneity of the spontaneous herbaceous understory vegetation, spatial differences in belowground litter and root exudate inputs may have accounted for the observed divergence of soil fungi under the trees.…”

Section: Discussionmentioning

confidence: 99%

Early response of soil fungal communities to the conversion of monoculture cropland to a temperate agroforestry system

Beule

Karlovský

2021

PeerJ

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Background Alley-cropping systems in the temperate zone are a type of agroforestry in which rows of fast-growing trees are alternated with rows of annual crops. With numerous environmental benefits, temperate agroforestry is considered a promising alternative to conventional agriculture and soil fungi may play a key in maintaining productivity of these systems. Agroforestry systems that are established for more than 10 years have shown to increase the fungal biomass and impact the composition of soil fungal communities. Investigations of soil fungi in younger temperate agroforestry systems are scarce and the temporal dynamic of these changes is not understood. Methods Our study was conducted in a young poplar-based alley cropping and adjacent monoculture cropland system in an Arenosol soil in north-west Germany. We investigated the temporal dynamics of fungal populations after the establishment of agroforestry by collecting soil samples half, one, and one and a half years after conversion of cropland to agroforestry. Samples were collected within the agroforestry tree row, at 1, 7, and 24 m distance from the tree row within the crop row, and in an adjacent conventional monoculture cropland. The biomass of soil fungi, Asco-, and Basidiomycota was determined by real-time PCR. Soil fungal community composition and diversity were obtained from amplicon sequencing. Results Differences in the community composition of soil fungi in the tree row and arable land were detected as early as half a year following the conversion of monoculture cropland to agroforestry. In the tree row, soil fungal communities in the plots strongly diverged with the age of the system. The presence of young trees did not affect the biomass of soil fungi. Conclusions The composition of soil fungal communities responded rapidly to the integration of trees into arable land through agroforestry, whereas the fungal biomass was not affected during the first one and a half years after planting the trees. Fungal communities under the trees gradually diversified. Adaptation to spatially heterogeneous belowground biomass of the trees and understory vegetation or stochastic phenomena due to limited exchange among fungal populations may account for this effect; long-term monitoring might help unravelling the cause.

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Section: Discussionmentioning

confidence: 99%

Early response of soil fungal communities to the conversion of monoculture cropland to a temperate agroforestry system

Beule

Karlovský

2021

PeerJ

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“…While evaluation of seedling root system architecture and root response to environmental factors is similar to approaches taken with Arabidopsis (e.g., Shinde et al, 2017Shinde et al, , 2019, feedstock propagation is typically via cuttings, which will be the focus here. Root mass and extent are all strongly correlated with the size of the cutting used to establish the tree (Douglas et al, 2016). In addition, extensive clonal variation in root number, length, and mass suggest lines could be selected for feedstock production on marginal soils (Phillips et al, 2014;Douglas et al, 2016;Carthy et al, 2018).…”

Section: Poplar Root Systemmentioning

confidence: 99%

“…Root mass and extent are all strongly correlated with the size of the cutting used to establish the tree (Douglas et al, 2016). In addition, extensive clonal variation in root number, length, and mass suggest lines could be selected for feedstock production on marginal soils (Phillips et al, 2014;Douglas et al, 2016;Carthy et al, 2018). This variation has additionally been used to help identify genes associated with rooting propensity (e.g., Dash et al, 2017Dash et al, , 2018, establishing pathways for selection of root traits.…”

Section: Poplar Root Systemmentioning

confidence: 99%

Bioenergy Underground: Challenges and opportunities for phenotyping roots and the microbiome for sustainable bioenergy crop production

York

Cumming

Trusiak

et al. 2022

The Plant Phenome Journal

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Bioenergy production often focuses on the aboveground feedstock production for conversion to fuel and other materials. However, the belowground component is crucial for soil carbon sequestration, greenhouse gas fluxes, and ecosystem function. Roots maximize feedstock production on marginal lands by acquiring soil resources and mediating soil ecosystem processes through interactions with the microbial community. This belowground world is challenging to observe and quantify; however, there are unprecedented opportunities using current methodologies to bring roots, microbes, and soil into focus. These opportunities allow not only breeding for increased feedstock production but breeding for increased soil health and carbon sequestration as well. A recent workshop hosted by the USDOE Bioenergy Research Centers highlighted these challenges and opportunities while creating a roadmap for increased collaboration and data interoperability through standardization of methodologies and data using F.A.I.R. principles. This article provides a background on the need for belowground research in bioenergy cropping systems, a primer on root system properties of major U.S. bioenergy crops, and an overview of the roles of root chemistry, exudation, and microbial interactions on sustainability. Crucially, we outline how to adopt standardized measures and databases to meet the most pressing methodological needs to accelerate root, soil, and microbial research to meet the pressing societal challenges of the century.

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“…Poplar, which is an important ecologically-important tree species, has a global distribution (Douglas et al, 2016). Currently, this tree is facing the danger of poplar canker.…”

Section: Introductionmentioning

confidence: 99%

Study on the molecular mechanism of Laccaria bicolor helping Populus trichocarpa to resist the infection of Botryosphaeria dothidea

Dong

Wang

Tang

2022

Journal of Applied Microbiology

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This study explored the specific molecular mechanism of Laccaria bicolor to help Populus trichocarpa resist infection by Botryosphaeria dothidea. Methods and Results: Transcriptome technology was used to sequence P. trichocarpa under disease stress, and a total of 6379 differentially expressed genes (DEGs) were identified. A total of 536 new DEGs were induced by L. bicolor during the infection of B. dothidea. L. bicolor helps to prevent and alleviate the infection of B. dothidea by regulating related genes in the cell wall pathway, signal transduction pathway, disease-resistant protein synthesis pathway and antioxidant enzyme synthesis pathway of P. trichocarpa. Conclusion:The inoculation of L. bicolor can regulate the expression of genes in the cell wall pathway and enhance the physical defense capabilities of plants. Under disease stress conditions, L. bicolor can regulate signal transduction pathways, diseaseresistant related pathways and reactive oxygen species (ROS) clearance pathways to help P. trichocarpa alleviate the disease. Significance and Impact of the Study:The research reveals the mechanism of L.bicolor inducing resistance to canker of P. trichocarpa from the molecular level and provides a theoretical basis for the practical application of mycorrhizal fungi to improve plant disease resistance.

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Early root development of field-grown poplar: effects of planting material and genotype

Cited by 13 publications

References 61 publications

Early response of soil fungal communities to the conversion of monoculture cropland to a temperate agroforestry system

Early response of soil fungal communities to the conversion of monoculture cropland to a temperate agroforestry system

Bioenergy Underground: Challenges and opportunities for phenotyping roots and the microbiome for sustainable bioenergy crop production

Study on the molecular mechanism of Laccaria bicolor helping Populus trichocarpa to resist the infection of Botryosphaeria dothidea

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