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Updated: Apr 1, 2026

High Resolution Quantification of Crystalline Cellulose Accumulation in Arabidopsis Roots to Monitor Tissue-specific Cell Wall Modifications

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Published on: May 10, 2016

Structure-function analysis identifies highly sensitive strigolactone receptors in Striga.

Shigeo Toh¹, Duncan Holbrook-Smith¹, Peter J Stogios²

¹Cell and Systems Biology, University of Toronto, 25 Willcocks Street, Toronto M5S 3B2, Canada.

Science (New York, N.Y.)

|October 10, 2015

Summary

This summary is machine-generated.

Striga hermonthica strigolactone receptors exhibit high sensitivity, driven by larger binding pockets. This discovery enables a new bioassay for identifying strigolactone-altering chemicals and crops.

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Lateral Root Inducible System in Arabidopsis and Maize

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Published on: January 14, 2016

Area of Science:

Plant Biology
Molecular Biology
Biochemistry

Background:

Strigolactones are crucial signaling molecules regulating plant development and interactions.
Parasitic plants like Striga hermonthica rely on strigolactones for host plant infestation.

Purpose of the Study:

To characterize the function and sensitivity of strigolactone receptors in Striga hermonthica.
To elucidate the structural basis for strigolactone sensitivity in parasitic plants.

Main Methods:

Chemical and structural biology techniques were employed.
Functional characterization of 11 strigolactone receptors from Striga hermonthica.
Crystal structure determination of a highly sensitive Striga strigolactone receptor.

Main Results:

Identified a clade of polyspecific strigolactone receptors in Striga.
Discovered a receptor sensitive to picomolar concentrations of strigolactones.
Revealed a larger binding pocket in the Striga receptor compared to Arabidopsis, explaining enhanced sensitivity.

Conclusions:

Striga's sensitivity to host strigolactones is mediated by its highly sensitive receptors.
The structural differences in receptors contribute to varying strigolactone sensitivity.
Developed a bioassay using Striga receptors in Arabidopsis for identifying chemicals and crops affecting strigolactone levels.