Xylem Surfactants Add New Element to Cohesion‑Tension Theory

A 2017 research article explores the role of surfactants in plant xylem. The authors propose that these surfactants introduce a new element to the classic cohesion‑tension theory. Cohesion‑tension theory traditionally describes water movement driven by surface tension and transpiration. The presence of surfactants may alter the physical properties of water within the vascular system. The study analyzes how this modification could affect water ascent in tall plants. Experimental data are presented to support the proposed revision of the theory. The authors discuss implications for plant physiology and drought resistance. Future work is suggested to test the model across diverse species.