When plants eat rocks: Functional adaptation of roots on rock outcrops

  title={When plants eat rocks: Functional adaptation of roots on rock outcrops},
  author={Laurent Augusto and Nicolas Fanin and Mark Ronald Bakker},
  journal={Functional Ecology},

Vellozioid roots allow for habitat specialization among rock‐ and soil‐dwelling Velloziaceae in campos rupestres

Plant growth on harsh substrates (habitat specialization) requires specific traits to cope with stressful conditions. We tested whether traits related to nutrient acquisition (root colonization by



Specialized roots of Velloziaceae weather quartzite rock while mobilizing phosphorus using carboxylates

The investigated roots show novel morphological and physiological specializations, coined vellozioid roots, which are highly effective at P acquisition, which play a pivotal role in rock weathering, contributing to shaping the campos rupestres landscapes.

Symbiotic germination and development of myco-heterotrophic plants in nature: transfer of carbon from ectomycorrhizal Salix repens and Betula pendula to the orchid Corallorhiza trifida through shared hyphal connections.

The results provide the first experimental confirmation that growth of Corallorhiza trifida can be sustained by supply of C received directly from an autotrophic partner through linked fungal mycelia.

The regulation of symbiotic N2 fixation: a conceptual model of N feedback from the ecosystem to the gene expression level

The presented model is based primarily on knowledge about the physiology of a few leguminous crop species and of ecosystem processes in managed, perennial grassland in temperate climatic conditions, and may stimulate thinking about functional relationships between symbiotic N2 fixation and terrestrial ecosystems at various system levels.

The role of fungi in weathering

No rock at the Earth's surface escapes weathering. This process is the primary source of all the essential elements for organisms, except nitrogen and carbon. Since the onset of terrestrial life,

Nitrogen-fixing red alder trees tap rock-derived nutrients

It is calculated that increased uptake of rock-derived nutrients by N-fixing alder requires a 64% increase in weathering supply of nutrients over nonfixing trees, thus increasing supplies of multiple nutrients that limit carbon uptake and storage in forest ecosystems.

Mineral nutrition of campos rupestres plant species on contrasting nutrient-impoverished soil types.

The large spectrum of leaf P concentration and variation in root morphologies show high functional diversity for nutritional strategies, and indicates a strong global functional convergence in plant mineral nutrition strategies among severely P-impoverished ecosystems.

Ancestral alliances: Plant mutualistic symbioses with fungi and bacteria

The spectrum of plant-microbe symbioses and their evolution is reviewed, including evidence from the Rhynie Chert of the Devonian period and modern associations, and some of the molecular pathways and cellular mechanisms involved in their evolution and development are discussed.

Frontiers in root ecology: recent advances and future challenges

Root resource acquisition, root dynamics, root-root and root-microbes interaction and the relative importance of root vs. soil properties on soil aggregation were shown to vary among biomes, soil and climate conditions.

Ectomycorrhizal fungi - potential organic matter decomposers, yet not saprotrophs.

It is proposed that ectomycorrhizal fungi benefit from organic matter decomposition primarily through increased nitrogen mobilization rather than through release of metabolic C and questioned is the view that they may act as facultative saprotrophs.