Figure 5:

Abiotic stress responses in lycophytes. (A) Diagram showing the pathway and genes involved in cold sensing and response in plants. The key genes EGR2, MYB15, and ANN1 were not detected in I. sinensis and most lycophytes. (B) Diagram showing the pathway and genes involved in salinity and drought stress sensing and signaling. The key genes MKK5, AIK1, MAP3K17/K18, HPCA1, ANN1, ANN4, SOS3, and SCaBP8 were not detected in I. sinensis and most lycophytes. Dotted lines and white text indicate the absence of genes.