greenhouse-horticulture
Greenhouse horticulture is the science and practice of cultivating plants within controlled-environment structures that regulate temperature, light, humidity, and CO₂ to optimize growth conditions year-round. This field is central to plant science research because it allows precise manipulation of environmental variables, enabling studies on plant physiology, stress responses, and productivity that would be confounded by outdoor variability. It also drives advances in sustainable food production by improving resource efficiency and extending growing seasons beyond natural climatic limits.
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
