Interaction between jasmonic and gibberellic acids on in vitro tuberization of potato plantlets |
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Authors: | Gabriela Castro Guillermina Abdala Cecilia Agüero R Tizio |
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Institution: | (1) Departmento de Ciencias Naturales, Facultad de Ciencias Exactas, Universidad Nacional de Río Cuarto, 5800-Río Cuarto, Córdoba, Argentina;(2) Facultad de Ciencias Agrarias, Chacras de Coria, 5505 Mendoza, Argentina |
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Abstract: | 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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Keywords: | Solanum tuberosum L potato tuberization growth regulators |
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