Nodulation inducing factors
US5141745A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1989 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Aug 8, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/878
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
Nodulation gene-inducing factors have been isolated and identified. A number of substituted flavones, some of which are components of exudates and extracts of leguminous plants, have been found to induce expression of certain nodulation genes in Rhizobium strains. Three components of clover extract 7,4'-dihydroxyflavone, 7,4'-dihydroxy-3'methoxyflavone, and 4'-hydroxy-7-methoxyflavone have been identified as nodulation inducers of certain Rhizobium trifolii nod genes. A number of other flavonoids including flavones, flavanones, flavanols and dihydroflavanols, not necessarily found in legume exudates, were also found to induce expression of certain nodulation genes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.