Collaboration with the next generation of classical artists has been a keystone of music director Esa-Pekka Salonen’s San Francisco Symphony tenure. For this return engagement, the Symphony is led by young Polish conductor Marta Gardolińksa, a Dudamel fellow who has twice led the LA Philharmonic at the Hollywood Bowl. The program features a little-heard but delightfully energetic overture by Polish composer Bacewicz, Mendelssohn’s “Scottish” symphony inspired by the composers first visit to Britain and “new cello genius” (Le Figaro) Pablo Ferrández performing Elgar’s contemplative cello concerto.