Fig. 9From: Comparative mitochondrial proteomic, physiological, biochemical and ultrastructural profiling reveal factors underpinning salt tolerance in tetraploid black locust (Robinia pseudoacacia L.)Functional classification of the identified proteins. The pie chart shows the distribution of the salt-responsive proteins into their functional classes in percentage. a Salt-responsive proteins in diploid (2×) R. pseudoacacia; b Salt-responsive proteins in tetraploid (4×) R. pseudoacacia Back to article page