Phototropism in Phycomyces as Investigated by Focused Laser Radiation

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Science  24 Jul 1970:
Vol. 169, Issue 3943, pp. 370-371
DOI: 10.1126/science.169.3943.370


The phototropic response and distribution of photopigment in the sporangiophore of Phycomyces was investigated with a microillumination pattern. The data support the hypothesis that phototropism results from greater stimulation of growth in regions of more intense illumination and indicate that the photoreceptor extends to the outer wall of the sporangiophore.

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