Germination inductor
As Keimungsinduktoren be physical or chemical factors which, at the breaking of dormancy contribute. The spores and seeds of many organisms often only germinate under the influence of such physical (light, temperature, humidity) or chemical factors ( plant hormones , messenger substances ).
For example, the seeds of parasitic plants of the genera Orobanche and Striga react to substances released from the roots of their potential host plants in the soil.
Chemical germination inductors
With the terpenoid Strigol (structure), such a germination inducer from cotton plants was identified for the first time in 1972, which triggers the germination of seeds of Striga lutea . Since then, a number of other compounds of similar structure have been isolated and characterized from different hosts by Orobanche and Striga , which are generally summarized under the term strigolactones . Another class of substances are carrots .
Individual evidence
- ^ CE Cook, Leona P. Whichard, Monroe Wall E., Grant H. Egley, P. Coggon, Patricia A. Luhan, AT McPhail: Germination stimulants. II. Structure of strigol, a potent seed germination stimulant for witchweed (Striga lutea) . Journal of the American Chemical Society 94, August 1972, p. 6198-6199 , doi : 10.1021 / ja00772a048 .
- ↑ Zwanenburg, Mwakaboko, Reizelman, Anilkumar, Sethumadhavan: Structure and function of natural and synthetic signaling molecules in parasitic weed germination . Pest Management Science 65, May 2009, p. 478-491 ( abstract ).