Oxygen Tension as a Control Mechanism in Pollen Tube Rupture

See allHide authors and affiliations

Science  18 Aug 1967:
Vol. 157, Issue 3790, pp. 833-834
DOI: 10.1126/science.157.3790.833


The decrease in stylar pO2 encountered by pollen as it approaches the ovary can induce bursting of pollen tube tips. Anaerobic conditions induced a high percentage of tube tip bursting in most pollen germinated in vitro. Changes in tube tip metabolism with decreased oxygen probably sets up cell wall stress resulting in pollen tube rupture.