Related Experiment Video
Updated: May 30, 2026

Light Sheet Fluorescence Microscopy of Plant Roots Growing on the Surface of a Gel
Published on: January 18, 2017
Light is a positive regulator of strigolactone levels in tomato roots
Hinanit Koltai1, Maja Cohen, Ori Chesin
1Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, PO Box 6, Bet Dagan 50250, Israel.
Abstract:
Strigolactones (SLs) or closely related molecules were recently identified as phytohormones, acting as long-distance branching factors that suppress growth of pre-formed axillary buds in the shoot. The SL signaling pathways and light appear to be connected, as SLs were shown to induce light-regulated pathways and to mimic light-adapted plant growth. However, it is not yet clear how light affects SL levels. Here, we examined the effect of different light intensities on SL levels in tomato roots. The results show that light intensity, above a certain threshold, is a positive regulator of SL levels and of Sl-CCD7 transcription; Sl-CCD7 is involved in SLs biosynthesis in tomato. Moreover, SL accumulation in plant roots is shown to be a time-dependent process. At least some of the similar effects of light and SLs on plant responses might result from a positive effect of light on SL levels.
More Related Videos
Related Concept Videos
Regulation of Transpiration by Stomata
Cell Signaling in Plants
Photoreceptors and Plant Responses to Light
Light Acquisition
Key Elements for Plant Nutrition

