ABSTRACT
Development of the research in the LDP Sinapis points clearly to participation of some common growth substances and assimilates in the control of evocation. The evidence concerning an eventual participation of endogenous growth substances and assimilates in the control of evocation is still of a preliminary and fragmentary nature. It shows that the content, metabolism, and/or distribution of all substances analyzed change during the floral transition, and the results leave open the possibility that some of these changes play an essential role in this developmental switch. The idea that evocation is controlled by several interacting flower-inducing and flower-inhibiting compounds is in line with the variety of correlative influences that have been found to interfere in the fate of all shoot meristems. The number and nature of the missing or limiting factors in unfavorable conditions depend on the species and various environmental parameters.
