Active form of ABA was present in significantly lower amount in Cot E than Cot explants, which
perhaps helps in maintaining cellular cytokinin homeostasis in the former explant. Nishiyama and co-researchers
[31] have shown evidences for such mutual regulation between the ABA and cytokinin in metabolism, and in
signaling control underlying different biological processes including plant growth/development and adaptation
to stress. The antagonistic function of cytokinin and ABA in plant tissue culture has also been supported by Kano
and Asahira [32] and Christianson [10].