Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Cell Signaling in Plants01:25

Cell Signaling in Plants

Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
Glucagon-like Receptor Agonists01:24

Glucagon-like Receptor Agonists

Incretins include glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which stimulate insulin secretion post-meals. In type 2 diabetes, GIP's efficacy is reduced, making GLP-1 a viable drug target. GIP originates from preproGIP.
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by the...
G Protein-coupled Receptors01:15

G Protein-coupled Receptors

G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
Indirect-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship01:29

Indirect-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship

Indirect-acting cholinergic agonists are agents that interact with the acetylcholinesterase enzyme in the synaptic cleft, preventing the breakdown of acetylcholine into choline and acetate. Consequently, the concentration of acetylcholine in the synaptic cleft increases. These agonists can be classified into reversible and irreversible inhibitors based on their duration of action.
Reversible inhibitors display short to medium durations of action. Short-acting agents include simple alcohols with...
Direct-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship01:22

Direct-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship

Cholinergic agonists or cholinomimetics mimic the action of acetylcholine to stimulate the parasympathetic nervous system. They are categorized into direct-acting and indirect-acting agents. The direct-acting cholinergic drugs induce the parasympathetic response by directly binding to the muscarinic or nicotine receptors. In comparison, the indirect-acting cholinergic drugs prevent acetylcholine hydrolysis, indirectly contributing to the extended parasympathetic response.
The direct-acting...
Inducible Operons: lac Operon01:25

Inducible Operons: lac Operon

The lac operon in Escherichia coli is a model for understanding inducible gene regulation and metabolic flexibility. It integrates local control by lactose and global regulation through catabolite repression, enabling E. coli to preferentially metabolize glucose when available and switch to lactose utilization when glucose is scarce.Structure and Function of the lac OperonThe lac operon contains three structural genes: lacZ (β-galactosidase), lacY (lactose permease), and lacA (thiogalactoside...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Editing strigolactone biosynthesis genes in tomato reveals novel phenotypic effects and highlights D27 as a breeding target for parasitic weed resistance.

Plant & cell physiology·2026
Same author

Spatially distinct regulation of strigolactone exudation by phosphate and phytohormones in rice.

Plant physiology and biochemistry : PPB·2026
Same author

Acid ceramidase overactivity drives ceramide loss, leading to atopic dry skin and Th2-skewed immune polarization.

The Journal of pathology·2026
Same author

High-Energy Emulsified Clove Essential Oil Nanoemulsion as a Natural Herbicidal Product: Germination Suppression and Seed Structure Alteration in <i>Echinochloa crus-galli</i>.

Plants (Basel, Switzerland)·2026
Same author

Herbicidal Activity of the Invasive Weed <i>Malachra capitata</i> L.: Growth Stage Dependence, Bioassay-Guided Fractionation, and Physiological Effects on Seed Germination.

Plants (Basel, Switzerland)·2026
Same author

Dawn of a new era for parasitic plant biology.

Plant & cell physiology·2026

Related Experiment Video

Updated: Jun 25, 2026

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer
11:33

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer

Published on: October 14, 2022

Strigolactones: structures and biological activities.

Koichi Yoneyama1, Xiaonan Xie, Kaori Yoneyama

  • 1Weed Science Centre, Utsunomiya University, Utsunomiya, Japan. yoneyama@cc.utsunomiya-u.ac.jp

Pest Management Science
|February 18, 2009
PubMed
Summary

Strigolactones are plant hormones regulating root parasitic weed germination and symbiotic fungal growth. Recent findings reveal plants produce both standard and epimeric forms of these crucial signaling molecules.

More Related Videos

Rapid One-step Enzymatic Synthesis and All-aqueous Purification of Trehalose Analogues
09:27

Rapid One-step Enzymatic Synthesis and All-aqueous Purification of Trehalose Analogues

Published on: February 17, 2017

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis
14:43

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

Published on: July 23, 2014

Related Experiment Videos

Last Updated: Jun 25, 2026

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer
11:33

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer

Published on: October 14, 2022

Rapid One-step Enzymatic Synthesis and All-aqueous Purification of Trehalose Analogues
09:27

Rapid One-step Enzymatic Synthesis and All-aqueous Purification of Trehalose Analogues

Published on: February 17, 2017

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis
14:43

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

Published on: July 23, 2014

Area of Science:

  • Plant Biology
  • Biochemistry
  • Hormone Signaling

Background:

  • Strigolactones are rhizosphere signaling molecules influencing parasitic weeds and symbiotic fungi.
  • They are recognized as a novel class of plant hormones regulating shoot development.
  • The C-D ring moiety is considered essential for strigolactone bioactivity.

Purpose of the Study:

  • To investigate the structural diversity of natural strigolactones.
  • To explore the implications of stereochemistry on strigolactone activity.
  • To understand the biosynthesis and occurrence of different strigolactone forms in plants.

Main Methods:

  • Chemical synthesis and derivatization of strigolactones.
  • Analysis of root exudates from various plant species.
  • Spectroscopic and chromatographic techniques for structural elucidation.

Main Results:

  • Natural strigolactones share a common C-D ring structure.
  • Substitutions on the A-B ring yield diverse strigolactone analogs like orobanchol, strigol, and sorgomol.
  • 2'-epi-strigolactones, previously uncharacterized, were identified in multiple plant root exudates.

Conclusions:

  • Plants produce a wider array of strigolactone structures than previously known.
  • The stereochemistry at C-2' is not strictly conserved for biological activity, as epimers are produced.
  • This discovery broadens our understanding of strigolactone biosynthesis and function in plant signaling.