THE INTERACTION OF THE SEED COAT AND GIBBERELLIC ACID IN THE GERMINATION OF DATURA FEROX L.

Publisher Website
Google Scholar
Abstract
Gibberellic acid (GA) eliminates the germination blockage in photoblastic Datura ferox seeds. With decoated dormant seeds, maximum response to GA can be obtained with only 24 hours treatment with this substance, if it is preceded by a period of pretreatment in water. This indicates the need for certain metabolic processes to take place if GA is to have an effect. These processes do not take place or do so at a much slower rate if intact seeds are pretreated in a similar fashion. As afterripening proceeds, the need for pretreatment and the effect of the seed coat are less evident. This behavior is very similar to that displayed by this species in relation to red light. It is possible that the modes of action of red light and GA have certain points of contact. These may be linked to the metabolic processes which take place during the first 48 hours incubation, and it is on them that the seed coat has its effect.

This publication has 3 references indexed in Scilit: