PsMAPK3, a new MAP kinase cDNA, was cloned from ovaries of Pisum sativum L. Expression of PsMAPK3 is at low basal levels in unpollinated ovaries but it is rapidly induced by gibberellic acid (peak at 30 min) and 6-benzyladenine (peak at 45 min). Both treatments promoted the development of a parthenocarpic fruit. In situ hybridization localized PsMAPK3 mRNA in ovules. The transcript was additionally detected in the mesocarp when it is expanding in response to the treatments. These observations suggest that gibberellins and cytokinins regulate PsMAPK3 mRNA levels in pea ovary shortly after fruit set is induced.
Plant Molecular Biology – Springer Journals
Published: Oct 16, 2004
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