Aging mugwort plants recruit busier microbial helpers in their soil
Qixiu C, Chen H, Hu S, Dai Y, Cui Y
Soil Health
The wild mugwort growing along trails and roadsides is quietly running a soil nutrient factory that gets more active as the plant matures, a reminder that what's happening at a plant's roots changes as much as what you see above ground.
Scientists looked at the soil clinging to the roots of a wild mugwort plant called Artemisia lavandulifolia at two points in its early life: a younger stage and a slightly older one. They found that as the plant aged, the mix of bacteria and fungi around its roots got more diverse and more tightly networked together, and the microbes ramped up activity on genes tied to capturing carbon, nitrogen, and phosphorus. It's a snapshot of how a plant's growth stage quietly reshapes its underground support crew to match its changing needs.
Key Findings
Bacterial and fungal diversity was significantly higher in the late vegetative stage than the early stage (p < 0.05)
Microbial co-occurrence networks grew more complex with age: bacterial networks went from 1049 to 1189 nodes and 76,390 to 98,550 edges; fungal networks went from 230 to 373 nodes and 4509 to 6932 edges
Genes for carbon fixation (cbbLR), nitrogen cycling (amoA), and phosphorus mineralization (phoD) were all significantly more abundant at the later growth stage (p < 0.05)
chevron_right Technical Summary
As mugwort plants grow from early to late vegetative stages, the community of bacteria and fungi living around their roots becomes more diverse and more interconnected, and ramps up genes involved in cycling carbon, nitrogen, and phosphorus, suggesting the plant recruits more helpful soil microbes as its nutrient needs increase.
Abstract Preview
Original paper
Phenology-dependent assembly and functional potential of the Artemisia lavandulifolia rhizosphere microbiome.
Plant developmental stages represent important endogenous drivers shaping rhizosphere microbiome assembly and functional potential. However, how rhizosphere microbial communities of Artemisia lavan...
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Mugwort is a common name for several species of aromatic flowering plants in the genus Artemisia. In Europe, mugwort most often refers to the species Artemisia vulgaris, or common mugwort. In East Asia, the species Artemisia argyi is often called "Chinese mugwort" in the context of traditional Ch...