stem-architecture
Stem architecture refers to the structural organization and growth patterns of plant stems, including branching angles, internode lengths, and overall plant form. Understanding stem architecture is critical for plant science because it directly influences light capture efficiency, resource allocation, and yield potential in crops. Researchers study the genetic and environmental factors that shape stem architecture to develop plants better suited for modern agricultural systems.
open_in_new WikipediaPubMed · 2026-04-25
Bending tomato stems in greenhouses — a common grower trick to manage canopy height — physically reshapes how the plant grows: stems get shorter between leaf nodes and wider overall. Researchers found this happens through hormone-level changes that slow cell expansion, not cell division, revealing the biology behind a practice growers have used for years without fully understanding.
Stem bending significantly reduced plant height and internode elongation, with the strongest effect on newly developing internodes
Shorter internodes were caused by restricted expansion of pith parenchyma cells, not a reduction in cell number
Genes involved in gibberellin deactivation and jasmonate biosynthesis/signaling were markedly upregulated in bent internodes
