Summary
A reverse of the delaying effect of gibberellic acid (GA3) was observed in in vitro tuberization of potato plantlets when the medium contained 0.8×10−5 M jasmonic acid (JA). The promoting effect of JA seemed to be correlated with the initial absence of growing roots, probably through direct activity of JA in microtuber-producing buds in the stoloniferous shoots. This is based on the fact that JA did not inhibit root growth a posteriori. Endogenous gibberellins (GAs) synthesized by roots did not interfere with the previous activity of JA in tuberization. The absence of a JA promoting-effect on tuberization of previously-rooted plantlets could be related to the capacity of potato roots to synthesize endogenous GAs which might antagonize the JA effect on buds of stoloniferous shoots.
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Castro, G., Abdala, G., Agüero, C. et al. Interaction between jasmonic and gibberellic acids on in vitro tuberization of potato plantlets. Potato Res 43, 83–88 (2000). https://doi.org/10.1007/BF02358516
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DOI: https://doi.org/10.1007/BF02358516