Soybean homologs of MPK4 negatively regulate defense responses and positively regulate growth and development.
Liu JZ, Horstman HD, Braun E, Graham MA, Zhang C, Navarre D, Qiu WL, Lee Y, Nettleton D, Hill JH, et al. Plant Physiol. 2011 Nov; 157(3):1363-78. Epub 2011 Aug 30.