Phosphinothricin stimulates somatic embryogenesis in grape (Vitis sp. L.)
Dominique Hébert-Soulé, Julie R. Kikkert, and Bruce I. Reisch
Plant Cell Reports 14:380-384 (1995)
The effect of phosphinothricin concentration on embryo production from an embryogenic callus of 'Chancellor' (Vitis L. complex interspecific hybrid) was tested. Embryogenic callus was cultured on medium supplemented with nine phosphinothricin concentrations (0, 0.1, 0.5, 1, 1.5, 2, 3, 5, and 10 mg/l). The highest number of embryos per plate was observed at 0.5 mg/l phosphinothricin. The use of phosphinothricin to stimulate embryo production did not affect embryo germination and plantlet formation. Three germination techniques were compared. Embryo dehydration or growth on Transfergel-solidified medium gave higher germination rates than chilling treatments. Most germinated somatic embryos produced secondary embryos from the hypocotyl after a few weeks of culture. Regardless of the germination technique, the plantlet conversion rate was very low.
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