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 Experiment Videos

Bioactive steroids from Oryza sativa L.

Francisco A Macías1, Nuria Chinchilla, Rosa M Varela

  • 1Grupo de Alelopatía, Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, c/República Saharaui, s/n, 11510 Puerto Real (Cádiz), Spain. famacias@uca.es

Steroids
|April 20, 2006
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

Non-strigolactone natural products interfering with parasitic weed development.

Natural product reports·2026
Same author

Stability studies of cynaropicrin-major sesquiterpene lactone of Cynara cardunculus leaves.

Pest management science·2026
Same author

Simulated gastrointestinal digestion of cocoa powder (INFOGEST): methylxanthine bioaccessibility and antioxidant properties.

Food & function·2026
Same author

Phytochemical Profiling and Antioxidant Properties of <i>Ziziphus lotus</i> (L.) Fruits Supported by Xanthine Oxidase Inhibition and Molecular Docking.

Plants (Basel, Switzerland)·2026
Same author

Improving the Activity of Aminophenoxazinones: Synthesis, CPC Purification, and Phytotoxicity Potential.

Journal of agricultural and food chemistry·2026
Same author

Nanoemulsion design of Cynara cardunculus leaves extract rich in sesquiterpene lactones.

Pest management science·2026

Rice compounds show potential as natural herbicides to combat herbicide-resistant weeds like barnyardgrass. Steroids, including ergosterol peroxide, demonstrated significant phytotoxicity, offering a novel approach to weed management.

Area of Science:

  • Agricultural Science
  • Plant Biochemistry
  • Chemical Ecology

Background:

  • Modern agriculture's reliance on monoculture and herbicides has led to herbicide-resistant weeds, notably barnyardgrass (Echinochloa crus-galli) in rice cultivation.
  • There is a critical need for new herbicides with novel modes of action to manage weed resistance and ensure crop yields.

Purpose of the Study:

  • To investigate the potential of rice (Oryza sativa) as a source of natural compounds for weed suppression.
  • To isolate and identify phytotoxic compounds from rice extracts and evaluate their efficacy against barnyardgrass.

Main Methods:

  • Rice plant material was processed into fresh, dried, and Pluviotron-harvested forms, with aerial and root parts separated.
  • Extracts were prepared using water, organic solvents, and the Pluviotron device, yielding 12 distinct extracts.

Related Experiment Videos

  • Bioassays, including wheat etiolated coleoptiles and phytotoxicity tests on barnyardgrass, were used to evaluate extract activity. Bioactive extracts were fractionated, and compounds identified using spectroscopic methods.

    • Main Results:

    • Fifteen compounds were isolated and identified; eight were newly reported in rice.
    • Ergosterol peroxide and 7-oxo-stigmasterol exhibited the highest phytotoxicity against barnyardgrass.
    • Ergosterol peroxide displayed greater activity than the commercial herbicide Logran.

    Conclusions:

    • This study reports the potential allelopathic activity of steroids isolated from rice against weeds.
    • Ergosterol peroxide and 7-oxo-stigmasterol are promising candidates for developing new, naturally derived herbicides.
    • Rice represents a valuable resource for discovering novel weed management solutions to combat herbicide resistance.