provenance-selection
Provenance selection is the practice of choosing plant material for cultivation or restoration based on the geographic origin of the source population, recognizing that plants from different locations have adapted to distinct local environmental conditions. This approach is critical in plant science because locally adapted genotypes often show superior survival, growth, and resilience compared to non-local material when planted in a given environment. As climate change alters growing conditions, researchers also explore 'climate-adjusted' provenance strategies to match plant genetics with projected future environments rather than current ones.
open_in_new WikipediaPubMed · 2026-05-08
A 6-year study found that where an oak tree's seeds originated matters more than which oak species it is when it comes to the soil microbes and root chemicals it develops. Oaks from drier regions carried distinct soil bacteria and drought-protective compounds even when grown in identical conditions, suggesting the trees' ancestral environment shapes their underground partnerships.
Geographic seed origin (provenance) consistently shaped the bacterial rhizosphere microbiome and root metabolome across a 6-year common garden experiment, while oak species identity had no significant effect.
Trees from the drier north German lowland origin were enriched with the bacterial family Pseudonocardiaceae, and showed higher levels of ellagic acid — a polyphenol associated with drought tolerance.
Higher intrinsic water use efficiency correlated with lower prokaryotic (bacterial) diversity in the rhizosphere, suggesting drought-adapted trees host more specialized microbial communities.
