Sesquiterpene lactones of Xanthium strumarium in a texas population and in experimental hybrids
Abstract
Morphologically diverse plants in a wild population of Xanthium strumarium in eastern Texas produced widely variant combinations of sesquiterpene lactones. Some plants showed a preponderance of xanthinin and related compounds, xanthanol and xanthatin, while others a predominance of stereoisomers, xanthumin, xanthumanol and deacetoxylxanthumin. Some plants produced only one sesquiterpene lactone and other plants yielded various mixtures of xanthinin, xanthumin and related compounds, including xanthinosin and/or tomentosin. Experimental hybridization between plants containing primarily xanthinin and plants containing xanthumin, but originating in diverse parts of the world, yielded F 1 progenies with xanthanol and/or xanthumanol as the predominant sesquiterpenoid component. The F 2 generation showed segregation of the xanthinin, xanthumin and related compounds. The Texas population occurs in an area where the "italicum" (xanthinin-predominants) and "chinense" (xanthumin-predominant) morphological complexes are sympatric. The diverse patterns of sesquiterpene lactones in the Texas population probably resulted from the natural hybridization of morphological complexes that originally were spatially isolated.
- Publication:
-
Biochemical Systematics and Ecology
- Pub Date:
- 1975
- DOI:
- 10.1016/0305-1978(75)90017-4
- Bibcode:
- 1975BioSE...3..137M
- Keywords:
-
- Xanthium strumarium;
- Asteraceae (Compositae);
- sesquiterpene lactones;
- hybridization;
- xanthinin;
- xanthumin