Effect of Rotation on Flowering Response of Xanthium pennsylvanicum

Science  17 Aug 1962:
Vol. 137, Issue 3529, pp. 535-536
DOI: 10.1126/science.137.3529.535


The flowering response of Xanthium pennsylvanicum Wallr. is attenuated when the plant is rotated around a horizontal axis at the rate of 0.25 rev/min. Rotation prior to an inductive dark period has the strongest effect.