To sum up, as shown in Fig. 7, our combined data suggested that DES-derived H2S might, at least partially, act as a downstream component of auxin signaling to trigger lateral root formation, by the modulation of CDKA;1, CYCA2;1 and KRP2 gene expression. Our research thus provides useful tools to illustrate the functions of H2S, a novel gasotransmitter, in specific developmental processes, as revealed in the case of lateral root formation