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. 2018 Jun 8;18:114. doi: 10.1186/s12870-018-1328-z

Fig. 1.

Fig. 1

Superoxide dismutase (SOD) activity and viability assays of pollen samples from 16 olive cultivars. a Total SOD activity [units (U)/mg of total protein] in pollen protein extracts. b Pollen viability assays of the same samples. Cultivar names are shown in the lower chart. The asterisks indicate a significant difference from the cv. ‘Picual’ according to Student’s t test at p < 0.01