Characterization of the florigenic promoter of mango
1999
Davenport, T.L.(University of Florida, Forida (USA))
Initiation of shoot growth is associated with a floral and vegetatively inductive signal that results in production of reproductive or vegetative shoots, respectively. The inductive signal is proposed to be a ratio of a cool-temperature-regulated, florigenic promoter and an age-regulated vegetative promoter, both of which are apparently synthesized in leaves and move in the phloem to buds. Results of field and controlled temperature experiments on whole plants will be presented which indicate that the flowering promoter is labile in buds, lasting only days after removal of leaves. Cutting bioassays and whole plant systems have been developed which flower when the florigenic promoter is present and the inhibitor is absent. Preliminary results of experiments using these bioassays confirm that the florigenic promoter has a short life span in buds lasting about one week. Preliminary results of chromatographic separations of sterile phloem exudates demonstrated reduction of several peaks over at 24-hour period. These reduced peaks represent potential candidates for further investigation into the identity of the florigenic promoter.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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