Biological resources
Seeds of wild type peas (L107, Torsdag cultivar) and mutants deficient in either SL synthesis mutants (rms1-2 and rms5-3 ) or SL signalling (rms3-1 and rms4-1 ) seed were kindly donated by Professor Christine Beveridge. Stocks of the aphid Acyrthosiphon pisum was maintained on wild type pea at a 16 h day length and 22±3oC.