sexual-dimorphism
Sexual dimorphism in plants refers to the phenomenon where male and female individuals of the same dioecious species display distinct physical differences beyond their reproductive structures, such as variations in leaf morphology, growth rate, biomass allocation, or stress tolerance. Understanding these differences is important for plant biologists because sex-specific traits can influence ecosystem dynamics, resource competition, and responses to environmental pressures like drought or herbivory. Research in this area helps reveal the evolutionary pressures shaping plant reproduction strategies and can inform conservation and breeding programs for dioecious species.
open_in_new WikipediaPubMed · 2026-04-01
Male and female poplar trees use fundamentally different underground strategies to compete for nitrogen when it's scarce, and these differences play out through shared fungal networks that connect their roots. Female trees are more aggressive nitrogen grabbers, while male trees rely more on the shared network — a hidden gender imbalance beneath the forest floor.
Female Populus cathayana trees acquired significantly more nitrogen through shared fungal networks than male trees under nitrogen-deficient conditions, indicating a sexually asymmetric competitive advantage.
Male and female trees employed distinct root strategies: females invested more in root architecture optimized for nutrient uptake, while males showed greater dependence on the common mycorrhizal network for nitrogen transfer.
The common mycorrhizal network acted as a conduit for net nitrogen transfer from male to female plants, suggesting that sex-based differences can drive directional resource flow within plant communities.
