Abstract
The relationships between IAA and ABA, and between BA and ABA in their effects on ethylene production were examined with etiolated mungbean hypocotyl segments. When ABA and IAA were simultaneously applied to the tissues, ABA inhibited IAA-induced ethylene production and the degree of inhibition was solely determined by the ABA concentrations. Increasing concentrations of BA did not affect ABA inhibition. Low concentrations of ABA slightly increased endogenous ethylene production. When ABA and BA were applied together in the presence of IAA, the degree of ABA inhibition was again determined by the ABA concentrations regardless of the BA concentrations. BA did not recover ABA inhibition and ABA did not inhibit the stimulative effect of BA on both endogenous and IAA-induced ethylene production. Almost the same results were obtained with ABA and BA pretreatment of the tissues. This indicates that in the processes of IAA-induced ethylene production, IAA and ABA act in series, but that the actions at their respective sites are independent.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
