Copyright © 2011 Qi-Jian Tan. This is an open access article distributed under the
Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This paper is concerned with a weakly coupled system of quasilinear parabolic equations where the coefficients are allowed to be discontinuous and the reaction functions may depend on continuous delays. By the method of
upper and lower solutions and the associated monotone iterations and by difference ratios method and various
estimates, we obtained the existence and uniqueness of the global piecewise classical solutions under certain
conditions including mixed quasimonotone property of reaction functions. Applications are given to three 2-species Volterra-Lotka models with discontinuous coefficients and continuous delays.