Allelopathy of yellow fieldcress (Rorippa sylvestris): Identification and characterization of phytotoxic constituents.

08:00 EDT 1st May 1992 | BioPortfolio

Summary of "Allelopathy of yellow fieldcress (Rorippa sylvestris): Identification and characterization of phytotoxic constituents."

Both the neutral and acidic fractions of the acetone extract of yellow fieldcress (Kireha-inugarashi,Rorippa sylvestris Besser) inhibited lettuce seed germination. Salicylic,p-hydroxybenzoic, vanillic, and syringic acid were identified in the acidic fraction. In the neutral fraction, hirsutin (8-methylsulfinyloctyl isothiocyanate), 4-methoxyindole-3-acetonitrile, and pyrocatechol were identified. Bioassay using a root exudate recirculating system showedR. sylvestris during flowering inhibited the lettuce seedling growth. Hirsutin (13μg/plant/day) and pyrocatechol (9.3μg/plant/day) were the major compounds released into the rhizosphere. Several combinations of pyrocatechol,p-hydroxybenzoic acid, vanillic acid, and hirsutin reduced lettuce seedling growth. These compounds seemed to be allelochemicals.


Department of Agricultural Chemistry, Faculty of Agriculture, Hokkaido University, 060, Sapporo, Japan.

Journal Details

This article was published in the following journal.

Name: Journal of chemical ecology
ISSN: 1573-1561
Pages: 683-691


PubMed Articles [8756 Associated PubMed Articles listed on BioPortfolio]

Analytical characterization of academic nude paintings by José Veloso Salgado.

This case study illustrates the analytical characterization of 12 academic nude paintings by Veloso Salgado, made between 1883 and 1893. The study was done with in situ methods (infrared reflectograph...

Molecular characterization of tea mosquito bug from tea growing regions of India.

The tea mosquito bug, Helopeltis (Hemiptera: Miridae), is an insidious pest that poses a significant economical threat to tea plantations. As a basic first step to control this pest is authentic ident...

Voice source characterization using pitch synchronous discrete cosine transform for speaker identification.

A characterization of the voice source (VS) signal by the pitch synchronous (PS) discrete cosine transform (DCT) is proposed. With the integrated linear prediction residual (ILPR) as the VS estimate, ...

Development of a comprehensive method for analyzing clerodane-type diterpenes and phenolic compounds from Casearia sylvestris Swartz (Salicaceae) based on ultra high performance liquid chromatography combined with chemometric tools.

This work describes the development and optimization of an analytical method utilising liquid chromatography and chemometrics to evaluate and differentiate two varieties of Casearia sylvestris Swartz ...

Contemporary Nucleic Acid-based Molecular Techniques for Detection, Identification, and Characterization of Bifidobacterium.

Bifidobacteria are one of the most important bacterial groups found in the gastrointestinal tract of humans. Medical and food industry researchers have focused on bifidobacteria because of their healt...

Clinical Trials [702 Associated Clinical Trials listed on BioPortfolio]

Human Immune Responses to The Yellow Fever Virus Vaccine

The objective of this study is to study immune memory generated against the yellow fever vaccine (YFV) in participants who recently received the YFV vaccine. Volunteers who are planning ...

Yellow Fever Virus Vaccine and Immune Globulin Study

The purpose of this study is to determine whether immune globulin can limit the amount of yellow fever vaccine virus present in the blood after vaccination without compromising the immunit...

Identification and Quantification of Immune Response Induced by Hyaluronidase and Other Factors of Virulence of Invasive Human Infections of Streptococcus Pneumoniae

- 4 tubes (2 x7-ml dry tubes with yellow gelose, and 2 x 5 ml tubes with blue CTAD) will be taken from the patient within 24 hours following inclusion (D0) in the department in ...

Immunity After Two Doses of Yellow Fever Vaccine

To evaluate the immune status of yellow fever in adults with a history of two or more doses of vaccine, having received the second dose for at least 1 year, compared to re-vaccinated indiv...

Characterization of T Cell Responses Following Yellow Fever Virus Vaccination in Healthy Adults

The investigators at Rockefeller University are doing this research to study how the immune system responds to viruses and other infectious agents by using the yellow fever 17D vaccine as ...

Medical and Biotech [MESH] Definitions

A plant genus of the family TROPAEOLACEAE. The common nasturtium is a plant that grows 2.4-3.6 m (8-12 feet) tall and has funnel-shaped flowers that are commonly yellow-orange with red spots or stripes and have a long spur that contains sweet nectar. Some species in this genus are called watercress which is also a common name for RORIPPA and NASTURTIUM.

Vaccine used to prevent YELLOW FEVER. It consists of a live attenuated 17D strain of the YELLOW FEVER VIRUS.

A rare condition characterized by the presence of yellow nails, LYMPHEDEMA, and/or PLEURAL EFFUSION with respiratory tract involvement. Abnormal lymphatic network may play a role in its etiology. Occasionally inherited, yellow nail syndrome mostly is sporadic without apparent family history.

A plant family of the order Capparales, subclass Dilleniidae, class Magnoliopsida. They are mostly herbaceous plants with peppery-flavored leaves, due to gluconapin (GLUCOSINOLATES) and its hydrolysis product butenylisotrhiocyanate. The family includes many plants of economic importance that have been extensively altered and domesticated by humans. Flowers have 4 petals. Podlike fruits contain a number of seeds. Cress is a general term used for many in the Brassicacea family. Rockcress is usually ARABIS; Bittercress is usually CARDAMINE; Yellowcress is usually RORIPPA; Pennycress is usually THLASPI; Watercress refers to NASTURTIUM; or RORIPPA or TROPAEOLUM; Gardencress refers to LEPIDIUM; Indiancress refers to TROPAEOLUM.

A mitosporic Loculoascomycetes fungal genus including several plant pathogens and at least one species which produces a highly phytotoxic antibiotic. Its teleomorph is Lewia.